Zeitschriftenartikel: „Cylindrical Tank“

1

Limarchenko, O., C. Cattani und V. Pilipchuk. „Structure of geometrical nonlinearities in problems of liquid sloshing in tanks of non-cylindrical shape“. Mathematical Modeling and Computing 1, Nr. 2 (2014): 195–213. http://dx.doi.org/10.23939/mmc2014.02.195.

Der volle Inhalt der Quelle

Annotation:

Structure of geometrical nonlinearities in mathematical model of liquid sloshing in tanks of non-cylindrical shape is under consideration. In contrast to the case of cylindrical reservoir, some new types of nonlinearities occur in mathematical statement of the problem. They are connected with four main reasons. First, they are determined by new normal modes, which correspond to non-cylindrical shape of the tank and take into account some nonlinear properties of the problem (for example, they follow tank walls above level of a free surface). Second, determination of the potential energy of the liquid includes tanks geometry in close vicinity of cross-section of undisturbed free surface of the liquid and tank walls. Third type of manifestation of geometrical nonlinearities is connected with compensation of elevation of liquid level due to non-cylindrical type of tank shape for providing law of mass conservation. The fourth type of nonlinearities is connected with simultaneous manifestation of physical and geometrical nonlinearities. Investigation showed that mostly manifestation of nonlinear properties of liquid sloshing, connected with geometrical nature, is predetermined by inclination and curvature of tank walls in close vicinity of contact of undisturbed liquid with tank walls. We illustrated some general properties of geometrical nonlinearities by the example of three cases of tanks, namely, cylindrical, conic, and paraboloidal tank, which is selected such that its walls have the same inclination near free surface of the liquid as conic tank, but in this case curvature is manifested supplementary.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

2

Tso, W. K., A. Ghobarah und S. K. Yee. „Seismic design forces for cylindrical tanks on ground“. Canadian Journal of Civil Engineering 12, Nr. 1 (01.03.1985): 12–23. http://dx.doi.org/10.1139/l85-002.

Der volle Inhalt der Quelle

Annotation:

A study is made on the hydrodynamic effect caused by seismic ground motions on the design of cylindrical on-ground liquid-storage tanks. The current techniques for determining the design base shear and overturning moment of the tank are reviewed, first treating the tank wall as rigid and then including the wall flexibility effect. By means of examples, these calculations are compared with those suggested by the National Building Code of Canada (NBCC). In addition, theoretically predicted values are compared with experimental data.It was found that in the case of tanks of high height to radius ratio and small wall thickness to radius ratio, the interaction of the fluid and wall flexibility can cause responses as high as two to three times those calculated based on rigid tank wall assumptions. The range of tank geometries under which the tank can be considered rigid is given. It is shown that the NBCC formula to establish seismic loads for tanks on ground is in general conservative, provided the acceleration ratio in the NBCC formulae takes on the value of maximum peak ground acceleration of the site. Key words: seismic, earthquake, hydrodynamic force, response, cylindrical tanks, design code.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

3

Doi, Taiga, Takashi Futatsugi, Michio Murase, Kosuke Hayashi, Shigeo Hosokawa und Akio Tomiyama. „Countercurrent Flow Limitation at the Junction between the Surge Line and the Pressurizer of a PWR“. Science and Technology of Nuclear Installations 2012 (2012): 1–10. http://dx.doi.org/10.1155/2012/754724.

Der volle Inhalt der Quelle

Annotation:

An experimental study on countercurrent flow limitation (CCFL) in vertical pipes is carried out. Effects of upper tank geometry and water levels in the upper and lower tanks on CCFL characteristics are investigated for air-water two-phase flows at room temperature and atmospheric pressure. The following conclusions are obtained: (1) CCFL characteristics for different pipe diameters are well correlated using the Kutateladze number if the tank geometry and the water levels are the same; (2) CCFL occurs at the junction between the pipe and the upper tank both for the rectangular and cylindrical tanks, and CCFL with the cylindrical tank occurs not only at the junction but also inside the pipe at high gas flow rates and small pipe diameters; (3) the flow rate of water entering into the vertical pipe at the junction to the rectangular upper tank is lower than that to the cylindrical tank because of the presence of low frequency first-mode sloshing in the rectangular tank; (4) increases in the water level in the upper tank and in the air volume in the lower tank increase water penetration into the pipe, and therefore, they mitigate the flow limitation.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

4

Kotrasova, Kamila, Ivan Grajciar und Eva Kormaníková. „Dynamic Time-History Response of Cylindrical Tank Considering Fluid - Structure Interaction due to Earthquake“. Applied Mechanics and Materials 617 (August 2014): 66–69. http://dx.doi.org/10.4028/www.scientific.net/amm.617.66.

Der volle Inhalt der Quelle

Annotation:

Ground-supported cylindrical tanks are used to store a variety of liquids. The fluid was develops a hydrodynamic pressures on walls and bottom of the tank during earthquake. This paper provides dynamic time-history response of concrete open top cylindrical liquid storage tank considering fluid-structure interaction due to earthquake. Numerical model of cylindrical tank was performed by application of the Finite Element Method (FEM) utilizing software ADINA. Arbitrary-Lagrangian-Eulerian (ALE) formulation was used for the problem analysis. Two way Fluid-Structure Interaction (FSI) techniques were used for the simulation of the interaction between the structure and the fluid at the common boundary

APA, Harvard, Vancouver, ISO und andere Zitierweisen

5

Kotrasova, Kamila, und Eva Kormanikova. „The Study of Seismic Response on Accelerated Contained Fluid“. Advances in Mathematical Physics 2017 (2017): 1–9. http://dx.doi.org/10.1155/2017/1492035.

Der volle Inhalt der Quelle

Annotation:

Ground-supported cylindrical tanks are strategically very important structures used to store a variety of liquids. This paper presents the theoretical background of fluid effect on tank when a fluid container is subjected to horizontal acceleration. Fluid excites the hydrodynamic (impulsive and convective) pressures, impulsive and convective (sloshing) actions. Seismic response of cylindrical fluid filling tanks fixed to rigid foundations was calculated for variation of the tank slenderness parameter. The calculating procedure has been adopted in Eurocode 8.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

6

Hlova, Taras, Mykhailo Semerak, Bogdanna Hlova und Mykola Mykhailyshyn. „The influence of pressure changes on the integrity of tanks for storage of petroleum products and toxic substances“. Military Technical Collection, Nr. 24 (20.05.2021): 31–36. http://dx.doi.org/10.33577/2312-4458.24.2021.31-36.

Der volle Inhalt der Quelle

Annotation:

Tanks for the storage of oil products and toxic substances in warehouses are the main ones. They can be in the form of separate tanks or a group of tanks. The most widespread are vertical steel tanks with a stationary roof that a placed in open areas. The tanks heat up, and the intensity of evaporation of the oil product increases in case of fire. If there is a permanent roof, the pressure in the tank will increase. If the capacity of the breathing valves is less than the intensity of evaporation then there is a risk of explosion. Explosions in the tank often lead to the separation of the bottom, and the side cylindrical surface and the roof fly away instantly, spilling oil on neighboring tanks and the territory of the tank’s park. Then the combustion area increases intensively. The destruction of the integrity of the tank, due to the separation of the bottom, contributes to temperature and power stresses, the value of which increases with increasing temperature of their heating and increasing pressure, respectively. The values of temperature stresses are added to the power stresses caused by pressure, and when the critical value is reached, destruction occurs. We investigated the stress-strain state of a steel vertical tank for the storage of oil products and toxic substances. The analysis of the reasons for the occurrence of admissible pressure in the tank, which is the reason for the loss of its integrity, is carried out. Using the differential equation of a closed cylindrical shell, which is under the action of internal pressure, analytical expressions are obtained to find deformations and stresses in the side cylindrical surface and bottom. Were calculated axial and annular stresses for the tank of RVS-900. Based on the basic relations of the theory of elasticity of thin plates and shells analytical expressions of the stress-strain state of the cylindrical tanks are obtained for conditions for changing of pressure on their structural elements. It is shown that the greatest values of axial stresses are obtained on the surface of the connection of the cylindrical surface with the bottom. The researches results are presented graphically.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

7

Zui, H., T. Shinke und A. Nishimura. „Experimental Studies on Earthquake Response Behavior of Cylindrical Tanks“. Journal of Pressure Vessel Technology 109, Nr. 1 (01.02.1987): 50–57. http://dx.doi.org/10.1115/1.3264855.

Der volle Inhalt der Quelle

Annotation:

A series of dynamic tests for the seismic behavior of ground-supported liquid storage tanks are evaluated and compared with previous theoretical studies. Two model tanks were subjected to shaking table tests with particular attention to the influence of base fixity and geometric imperfections in the tank walls. Test results support numerical calculations which show that base fixity conditions strongly influence the seismic response of tanks. Although high radial accelerations are induced by the imperfections, they are not found to be significant factors in tank failure.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

8

Tang, Fei, Yong Li und Yong Bin Geng. „Liquid Sloshing Damping Computation in Cylindrical Tank Based on VOF Method“. Applied Mechanics and Materials 390 (August 2013): 116–20. http://dx.doi.org/10.4028/www.scientific.net/amm.390.116.

Der volle Inhalt der Quelle

Annotation:

For liquid sloshing in partially filled cylindrical tank, the influence of the free surface on the sloshing damping is very important, especially in the application of spacecraft. In order to calculate the damping characteristic of partially filled cylindrical tanks more accurately, the finite volume scheme base on Volume-of-Fluid (VOF) is used to simulate the interface flow in the tank. Second order accurate piecewise line interface construction scheme is used to reconstruct the free surface. Through the numerical simulation, the influence on the sloshing damping with different liquid fill ratios in the cylindrical tanks is obtained.At the end, by use of semi-empirical equation, found that it agrees with theoretical results reasonably well.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

9

Goudarzi, Mohammad Ali, Mojtaba Moosapoor und Mohammad Reza Nikoomanesh. „Seismic design loads of cylindrical liquid tanks with insufficient freeboard“. Earthquake Spectra 36, Nr. 4 (09.06.2020): 1844–63. http://dx.doi.org/10.1177/8755293020926191.

Der volle Inhalt der Quelle

Annotation:

Cylindrical liquid tanks are essential elements of lifelines that should maintain performance during and immediately after an earthquake. Sloshing of liquid in a tank without sufficient freeboard in response to an earthquake can redistribute the hydrodynamic pressure on the tank shell. This study aims to explore changes in the seismic design load caused by insufficient freeboard using experimental and numerical methods. A series of shaking table tests on a small-scale tank subjected to seismic excitation are performed and the effects of insufficient freeboard on the hydrodynamic base shear are investigated. By altering the liquid height-to-tank radius ratio and freeboard, 190 cases were considered. An equivalent simplified mass spring model of the corresponding regular tank for experimental cases is adjusted in the numerical study and a simple analytical solution to estimate the hydrodynamic force on a tank with insufficient freeboard is suggested and validated using the experimental results.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

10

Zeybek, Özer. „Design of cylindrical steel liquid tanks with stepped walls using One-foot method“. Challenge Journal of Structural Mechanics 7, Nr. 4 (16.12.2021): 162. http://dx.doi.org/10.20528/cjsmec.2021.04.001.

Der volle Inhalt der Quelle

Annotation:

Cylindrical steel tanks are used in most countries to store bulk volumes of both solid and liquid products such as water, oil, gasoline and grain. Such steel tanks are prone to buckling when subjected to external pressure either due to vacuum or due to wind. These types of shell structures are generally controlled by elastic buckling failure because of the thin wall thickness. Cylindrical shells are commonly constructed with stepwise variable wall thickness due to economic reasons. The thickness of the tank shell wall is designed to increase from top to bottom because the stress resultants on the tank wall gradually increase towards the base of the tank. For open-top tanks, a primary stiffening ring is required at or near the top to maintain roundness under all loads. Stress resultants in a primary stiffening ring were previously identified by the Author for uniform wall thick tanks. In this new study, the applicability of this hand calculation method in stepped wall tanks has been investigated. Pursuant to this goal, a specified tank shell was designed considering One-foot method. Then, the stepped wall tank was transformed into an equivalent 1-course tank for hand calculation. Using the previously developed hand calculation method by Author, a test for the in-plane bending moment in the ring was conducted to achieve an acceptable value for stepped wall tanks. The analysis results show that the previously proposed method for uniform wall thick tanks may also be used for stepped wall tanks considering an equivalent thickness. On the other hand, using Linear Buckling Analysis (LBA), the buckling mode was obtained for two different stepped wall tanks in the study.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

11

Ye, Z., und A. M. Birk. „Fluid Pressures in Partially Liquid-Filled Horizontal Cylindrical Vessels Undergoing Impact Acceleration“. Journal of Pressure Vessel Technology 116, Nr. 4 (01.11.1994): 449–58. http://dx.doi.org/10.1115/1.2929615.

Der volle Inhalt der Quelle

Annotation:

An experimental investigation has been carried out to study the fluid pressures in partially liquid-filled vessels when they are suddenly accelerated by impact along the longitudinal axis. The experiments were conducted with three horizontal cylindrical tanks of different length-to-diameter ratios of L/D = 6.0, 3.5, 2.0. The tanks were filled with water at ambient pressure and temperature and were accelerated using a large steel impact hammer. Internal tank wall pressures caused by the acceleration were measured with transient pressure transducers. Six types of pressure-time histories have been observed and results indicated that the pressure profile changes with fill level and transducer location. The peak pressures on the end of the tank are strongly affected by the fill level and the tank length-to-diameter ratio L/D. A modal change in the behavior of liquid movement has been found around fill level h/D = 0.95. For fill levels h/D above 0.95, the pressure in the tanks acted like either a water hammer or an accelerated fluid column, depending on the duration of the impact relative to the pressure wave transit time. For the fill levels with h/D below 0.95, liquid sloshing activity was involved and the pressure at the end of the tank was a function of the liquid dynamic pressure. This modal change also caused the location of maximum peak pressure to move from the impact end of the tank to the tank top. In some cases the pressure on the tank top was two times larger than that at the tank impact end. The maximum pressure observed from the tests was on the top of the tank. This modal change may have some significance in some transportation applications.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

12

Mir, Faizan Ul Haq, Ching-Ching Yu und Andrew S. Whittaker. „Rocking response of liquid-filled cylindrical tanks“. Earthquake Spectra 37, Nr. 3 (11.01.2021): 1698–709. http://dx.doi.org/10.1177/8755293020981973.

Der volle Inhalt der Quelle

Annotation:

The hydrodynamic response of liquid-filled storage tanks subjected to translational earthquake shaking has been the focus of studies for more than 75 years. In service, tanks experience six components of seismic input, with rocking due to support flexibility and/or rotational components of ground motion. Published theory for predicting hydrodynamic responses in rigid cylindrical tanks due to rotational seismic input is examined. Analytical solutions for pressure in the fluid and on the tank wall, and base moment are modified to account for the effects of angular displacements at the base. A finite element model of a water-filled cylindrical tank using the Arbitrary Lagrangian and Eulerian (ALE) solver in LS-DYNA is used to demonstrate the efficacy of the proposed expressions for three base rocking motions. Results from the modified analytical solutions and the finite element model are in excellent agreement.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

13

Sames, Pierre C., Delphine Marcouly und Thomas E. Schellin. „Sloshing in Rectangular and Cylindrical Tanks“. Journal of Ship Research 46, Nr. 03 (01.09.2002): 186–200. http://dx.doi.org/10.5957/jsr.2002.46.3.186.

Der volle Inhalt der Quelle

Annotation:

To validate an existing finite volume computational method, featuring a novel scheme to capture the temporal evolution of the free surface, fluid motions in partially filled tanks were simulated. The purpose was to compare computational and experimental results for test cases where measurements were available. Investigations comprised sloshing in a rectangular tank with a baffle at 60% filling level and in a cylindrical tank at 50% filling level. The numerical study started with examining effects of systematic grid refinement and concluded with examining effects of three-dimensionality and effects of variation of excitation period and amplitude. Predicted time traces of pressures and forces compared favorably with measurements.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

14

Cheng, Xu Dong, Jing Jing Hu und Li Ming Zhao. „Dynamic Response Analysis of Vertical Cylindrical Storage Tanks Based on ADINA“. Applied Mechanics and Materials 90-93 (September 2011): 1482–85. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.1482.

Der volle Inhalt der Quelle

Annotation:

Storage tanks after earthquake disaster may create the serious consequence, so their anti-seismic problems have drawn greater attention, and their seismic response become the focus of research. Considering the liquid-solid coupling and the interaction between foundation and storage tanks，three different volumes of storage tanks that have different liquid height were simulated under the earthquake using the software ADINA. The liquid sloshing wave height, peak acceleration of tank wall and hydrodynamic pressure were analyzed. The results show that the peak sloshing wave height shows a rising trend basically with the increase of liquid height, and the roofs of large tanks are more easier to be destroyed by liquid sloshing. With the increase of liquid height and tank volume, the response of peak acceleration is greater. The hydrodynamic pressure increases with the decrease of liquid height. Near the bottom of tank wall the value of hydrodynamic pressure is relatively large, so elephant foot buckling is easier to happen in that area.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

15

Natsiavas, S. „An Analytical Model for Unanchored Fluid-Filled Tanks Under Base Excitation“. Journal of Applied Mechanics 55, Nr. 3 (01.09.1988): 648–53. http://dx.doi.org/10.1115/1.3125843.

Der volle Inhalt der Quelle

Annotation:

A set of equations is derived describing the dynamic response of cylindrical liquid storage tanks under horizontal ground excitation. The structure consists of a flexible cylindrical tank with a roof and a bottom plate and rests on a flexible ground through a rigid foundation. Portion of the base of the tank may separate from and lift off the foundation during ground motion. The solution of the hydrodynamic problem is first found in closed form. Then, Hamilton’s principle is applied and the equations governing the behavior of the coupled fluid/structure/ground system are derived. During this procedure, the base uplifting is modeled by an appropriate rotational nonlinear spring placed between the base of the tank and the foundation.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

16

Kotrasova, Kamila, Eva Kormanikova und Iveta Hegedusova. „Analysis of the peak vertical displacement of liquid surface due to sloshing“. MATEC Web of Conferences 313 (2020): 00023. http://dx.doi.org/10.1051/matecconf/202031300023.

Der volle Inhalt der Quelle

Annotation:

When a tank containing liquid vibrates, the liquid exerts hydrodynamic effects on the solid domain of a tank. In the case of roof tanks, a large sloshing wave will impact the wall or roof of the tanks and may cause extensive damage or failure of the tanks. This paper provides the theoretical background of simplified seismic analysis of liquid storage cylindrical ground -supported tanks, and it documents the seismic effect of input motions characteristics on fluid sloshing behaviour.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

17

Jendželovský, Norbert, und Lenka Uhlířová. „Rectangular tank under the seismic load“. MATEC Web of Conferences 313 (2020): 00022. http://dx.doi.org/10.1051/matecconf/202031300022.

Der volle Inhalt der Quelle

Annotation:

Tanks have been currently used for the storage of various substances, in particular as drinking water storage tanks and for storage of various technical fluids. Rectangular tanks have advantages over cylindrical tanks, such as: lower sensitivity to unilateral loads and better use of space when used in a system of tanks. The rectangular tank analyzed in this article is filled with water. During the dynamic analysis of the tank, it was loaded by an accelerogram of a natural earthquake. In the calculation, the method of direct integration over time was used, considering damping. From the accelerogram a response spectrum was generated and applied as an additional loading of the tank. The static model of the tank was created in the ANSYS program, which works on the basis of the finite element method (FEM).

APA, Harvard, Vancouver, ISO und andere Zitierweisen

18

Kobayashi, N., T. Mieda, H. Shibata und Y. Shinozaki. „A Study of the Liquid Slosh Response in Horizontal Cylindrical Tanks“. Journal of Pressure Vessel Technology 111, Nr. 1 (01.02.1989): 32–38. http://dx.doi.org/10.1115/1.3265637.

Der volle Inhalt der Quelle

Annotation:

An experimental and analytical study was conducted to determine the liquid natural frequencies and the resultant slosh forces in horizontal cylindrical tanks. This paper presents a study of the liquid slosh response of the small and the large slosh wave heights. In the former case, an effective calculation method of the longitudinal slosh response is presented by substituting an equivalent rectangular tank for a horizontal cylindrical tank. The calculated natural frequencies, slosh wave heights and slosh forces are in good agreement with the experimental ones. The transverse slosh response is also discussed. In the latter case, impulsive slosh forces were observed for longitudinal excitation, when the slosh liquid hit the top of the tank. The measured slosh forces including the impulsive forces were larger than the calculated ones. In order to determine the maximum slosh force, the experiments were parametrically conducted with several tank aspect ratios, liquid levels and excitation amplitudes. The obtained maximum slosh forces for longitudinal and transverse direction were about 0.28 and 0.16 times the full liquid weight of the tank, respectively.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

19

Ozdemir, Zuhal, Mhamed Souli und M. Fahjan Yasin. „Numerical Evaluation of Nonlinear Response of Broad Cylindrical Steel Tanks under Multidimensional Earthquake Motion“. Earthquake Spectra 28, Nr. 1 (Februar 2012): 217–38. http://dx.doi.org/10.1193/1.3672996.

Der volle Inhalt der Quelle

Annotation:

In this paper, a fluid-structure interaction (FSI) algorithm of the finite element method (FEM), which can take into account the effects of geometric and material nonlinearities of the tank, buckling of the tank shell, and nonlinear sloshing behavior of the contained liquid, is utilized to evaluate the actual behavior of broad cylindrical steel tanks when subjected to strong earthquake motions. In order to clarify a key question—whether anchoring would prevent earthquake damage to tanks—numerical analyses are carried out on the same tank model having two different support conditions: anchored and unanchored. In addition to two horizontal components of ground motion, the vertical component is also taken into account in order to determine the relative importance of vertical ground motion in the behavior of tanks. The consistency of provisions presented in current design codes and numerical analysis results is evaluated.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

20

Ishida, K., und N. Kobayashi. „An Effective Method of Analyzing Rocking Motion for Unanchored Cylindrical Tanks Including Uplift“. Journal of Pressure Vessel Technology 110, Nr. 1 (01.02.1988): 76–87. http://dx.doi.org/10.1115/1.3265572.

Der volle Inhalt der Quelle

Annotation:

In order to calculate the rocking response of the unanchored cylindrical tank, including the bottom uplift due to seismic loading, a simple but effective method is developed. Firstly, an analysis model for the rocking response is presented; tank wall and liquid content are replaced with a mass-spring system, and the nonlinearity associated with the partial uplift of bottom plate is considered as the rotational spring of a bilinear type. The reliability of this analysis was illustrated by comparing the calculation results of resonance frequencies and rotation angles of tank models with the results of vibration tests. Secondly, a simple calculation method for obtaining the rocking responses of tanks from a few graphs without troublesome calculations is proposed. And lastly, some examples of applying the calculation for full-scale tanks are shown. It is clarified that the bottom plates of tall tanks with a capacity of a few thousand kiloliters are most likely to be uplifted by seismic loading.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

21

Kotrasová, Kamila. „Seismic Response of Liquid Storage Ground Supported Tanks for Different Slenderness Ratio“. Transactions of the VŠB – Technical University of Ostrava, Civil Engineering Series. 16, Nr. 1 (01.03.2016): 15–20. http://dx.doi.org/10.1515/tvsb-2016-0003.

Der volle Inhalt der Quelle

Annotation:

Abstract Ground-supported cylindrical tanks are used to store a variety of liquids. This paper provides the theoretical background for takes into account impulsive and convective (sloshing) actions of the fluid in concrete containers fixed to rigid foundations; it has been adopted in Eurocode 8. Seismic responses - base shears, the bending and overturning moments - are calculated by using the response spectra of the earthquake in Loma Prieta, California (18.10.1989). As the examples is analyzed the ground supported cylindrical concrete tanks, fluid filling is H = 2 m and R are depended from tank slenderness ratio γ = H/R. For considered tank slenderness ratios γ = 0.3, 0.5, 0.7, 1, 2, 3 R are given 6.667 m, 4 m, 2.857 m, 2 m, 1 m and 0.667 m.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

22

Fang, Zhou, Zhi Ping Chen, Chu Lin Lu und Ming Zeng. „Effect of Weld on Axial Buckling of Cylindrical Shells“. Advanced Materials Research 139-141 (Oktober 2010): 171–75. http://dx.doi.org/10.4028/www.scientific.net/amr.139-141.171.

Der volle Inhalt der Quelle

Annotation:

Large oil storage tank (oil tank for short) shells are vulnerable to buckling damage when suffering the seismic loads. Numerical simulation analysis was taken to estimate the effects of the weld form, number and their location to axial buckling stress of cylindrical shells, considering not only the characteristic of welding processes, but also the effects probably caused by magnitude of residual stress and deformation on elephant foot buckling to oil tanks. It is revealed that the existence of circumferential welds had obvious negative effect on axial buckling critical stress compared with the structure without welds, while the effects of weld number and location were not as much; longitudinal welds had no visible effect on axial buckling critical stress; controlling the residual stress and deformation range caused by circumferential welds should be the key point during the tanks welding process.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

23

Chen, Z. P., Y. Y. Duan, J. M. Shen und J. L. Jiang. „A simplified method for calculating the stress of a large storage tank wall“. Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 221, Nr. 3 (01.08.2007): 119–27. http://dx.doi.org/10.1243/09544089jpme125.

Der volle Inhalt der Quelle

Annotation:

With consideration of the influences from the constraint reaction of tank bottom plate to each shell course, a simplified long-short shell method was proposed to calculate the stress of a large storage tank wall. The first shell course was regarded as a short cylindrical shell while all the others as long cylindrical shells, and the analytic solution equations of shell stress were achieved by theory of plates and shells. With resistance stress-strain method, a field stress test was done on a 15x104 m3 floating-roof oil tank during its water filling test, and the measured stress data are in good agreement with the calculation results obtained by this simplified calculation method for shell stress. Therefore, the simplified method can be adopted to calculate the shell stress of large storage tanks accurately.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

24

Abdi, Behzad, Hamid Mozafari, Ayob Amran und Roya Kohandel. „Optimum Size of a Ground-Based Cylindrical Liquid Storage Tank under Stability and Strength Constraints Using Imperialist Competitive Algorithm“. Applied Mechanics and Materials 110-116 (Oktober 2011): 3415–21. http://dx.doi.org/10.4028/www.scientific.net/amm.110-116.3415.

Der volle Inhalt der Quelle

Annotation:

Steel cylindrical tank is one of the most common forms of liquid storage vessels. In this study the Imperialist Competitive Algorithm (ICA) is used to find the optimum size of a ground based cylindrical liquid storage tank that is supported at both ends and the design considerations are stability and strength constraints. In this study total internal pressure and total special pressure are assumed as two types of load. The optimization procedure is formulated with the objective to minimize the mass of the tank due to the allowable capacity of cylindrical tank.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

25

B. Zh. Kyrykbaev, B. T. Shingisov und N. K. Utelieva. „AXISYMMETRIC BENDING OF A CYLINDRICAL TANK“. Bulletin of the National Engineering Academy of the Republic of Kazakhstan 3, Nr. 77 (15.10.2020): 18–25. http://dx.doi.org/10.47533/2020.1606-146x.02.

Der volle Inhalt der Quelle

Annotation:

An article is available on the problem associated with the presence of a completely isolated or partially liquid part, for example, oil, gasoline or in a loose way, for example, with grain. The tank, located on a non-deformable foundation, is a thin elastic closed end shell.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

26

Kotrasová, Kamila, und Eva Kormaníková. „Liquid Storage Cylindrical Tank - Earthquake Analysis“. MATEC Web of Conferences 125 (2017): 04009. http://dx.doi.org/10.1051/matecconf/201712504009.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

27

Kormanikova, Eva, und Kamila Kotrasova. „Multiscale modeling of composite cylindrical tank“. Data in Brief 18 (Juni 2018): 1777–83. http://dx.doi.org/10.1016/j.dib.2018.04.091.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

28

Danca, P. A., C. A. Băbuţanu, F. Bunea und A. Nedelcu. „Mixing Flow Characteristics in cylindrical tank“. IOP Conference Series: Earth and Environmental Science 664, Nr. 1 (01.05.2021): 012060. http://dx.doi.org/10.1088/1755-1315/664/1/012060.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

29

Noroozi, Siamak, John Vinney, Philip Sewell und Rasoul Khandan. „An Empirical Model of Ribbed Cylindrical Glass Reinforced Plastic Tanks“. Applied Mechanics and Materials 232 (November 2012): 51–56. http://dx.doi.org/10.4028/www.scientific.net/amm.232.51.

Der volle Inhalt der Quelle

Annotation:

Ribbed cylindrical Glass Reinforced Plastic (GRP) tanks are currently designed using simplified theory the results of which are then verified by extensive destructive testing. This approach is expensive and can only generate non-optimal design solutions. In addition, there is often a high degree of discrepancy between theoretical and experimental results which necessitates the use of undesirably high factors of safety, which in turn results in the excessive use of material with the concomitant increase in cost, weight and manufacturing time. The primary aim of this investigative research was to develop a more deterministic and accurate design method of predicting the structural integrity and performance of underground cylindrical GRP tanks using non-destructive testing. Linear and non-linear Finite Element Analysis (FEA) techniques, validated against experimental results, were used to analyze a large number of underground ribbed cylindrical GRP tanks. The outcome of which was then expressed in the form of an empirical ‘Design Formula’ which provides a comprehensive solution to ribbed cylindrical GRP tank design for a wide range of tank sizes, laminate lay-ups and material properties. It is intended that the application of this method will eliminate the need for the expensive field tests that are currently required by design codes and standards.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

30

Zui, H., und T. Shinke. „Seismic Response Analysis of Cylindrical Tanks With Initial Irregularities on Side Walls“. Journal of Pressure Vessel Technology 107, Nr. 2 (01.05.1985): 107–17. http://dx.doi.org/10.1115/1.3264421.

Der volle Inhalt der Quelle

Annotation:

The objective of this paper is to report the findings of the study on the effects of initial irregularities on the seismic response of cylindrical tanks. The initial irregularities induce circumferential hydrodynamic pressure components of high-order modes, which are neglected in current design assumptions. Seismic response formulas for cylindrical tanks with arbitrary initial irregularities have been derived from Lagrange’s kinematic equation taking into account natural frequencies, vibrational modes and the hydrodynamic pressure. The hydrodynamic pressure in an irregular tank is evaluated by using velocity potential function. Natural frequency analysis is done by means of the transfer matrix method taking into consideration the initial hoop stress. The effect of aspect ratio H/D (H: liquid height and D: tank diameter) and the shape of initial irregularities are further examined by numerical calculations.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

31

Buslaeva, I. I. „Brittle Fractures of Cylindrical Steel Storage Tanks for Petroleum and Petroleum Products in the North“. IOP Conference Series: Earth and Environmental Science 988, Nr. 5 (01.02.2022): 052057. http://dx.doi.org/10.1088/1755-1315/988/5/052057.

Der volle Inhalt der Quelle

Annotation:

Abstract This article discusses brittle fracture accidents of petroleum and petroleum products storage tanks that occurred in Yakutia. Operational safety of tanks in the cryolithozone is reduced by harsh natural and climatic conditions, the uniform and differential settlements of the shell and bottom, long-term operation associated with the degradation of structures and materials in such climatic conditions. The main factor contributing to brittle fracture is extreme low ambient temperature, which reduces the ductility and resistance to brittle fracture of steel of structures and welds. The uniform and differential settlements of the tank lead to appearance of dangerous stress-strain state of shell and its general and local deformations. A sharp change in the air temperature causes thermal stresses in the statically indeterminate structures of the tank. Analysis of tank accidents in Yakutia shows that places of crack initiation are assembly welds and their heat-affected zones, the metallurgical and corrosion defects of the base metal. Dangerous areas of the tank are shell-to-bottom connections and attachments of piping nozzles to the shell. The main cause of the considered accidents is the use of low-carbon steel that does not recommend to the oil tank operation in the climatic conditions of the cryolithozone.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

32

Hotala, Eugeniusz, und Rajmund Ignatowicz. „Effect of settlement of foundations on the failure risk of the bottom of cylindrical steel vertical tanks for liquids“. Studia Geotechnica et Mechanica 41, Nr. 3 (30.09.2019): 171–76. http://dx.doi.org/10.2478/sgem-2019-0017.

Der volle Inhalt der Quelle

Annotation:

AbstractDifferent types of foundations are used in steel, above-ground cylindrical storage tanks for liquids. If a sand-gravel foundation is used under the entire bottom of the tank or only in the central part of the tank, settlement can be expected, and it increases after many years of operation. The paper presents the typical kinds and types of soil settlements under the bottoms of the tanks, in which different types of foundations were used. Numerical analyses of the effect of the soil settlement on the state of deformations and stresses in steel sheets of the bottom under one of the real tanks, in which different types of foundations and different cases of settlement were assumed. The results of numerical analyses indicated the possibility of evaluating the state of the soil settlement and bottom sheet deformations on the basis of simple measurements of deformations of the lower part of the tank cylinder. These measurements can be very useful in assessing the possible risk of failure of the tank bottom during each period of its operation, as measurements of settlement of the bottom of a filled tank are not feasible in practice. It has been proposed that in each steel tank, the deformation of the cylinder’s sheets should be measured even before the beginning of exploitation, and that in subsequent periodical measurements, the influence of the soil settlement under the tank on the state of the cylinder deformation and bottom’s strain should be assessed more accurately.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

33

Rawat, Aruna, Vasant Matsagar und A. K. Nagpal. „Seismic Analysis of Steel Cylindrical Liquid Storage Tank Using Coupled Acoustic-Structural Finite Element Method For Fluid-Structure Interaction“. International Journal of Acoustics and Vibration 25, Nr. 1 (30.03.2020): 27–40. http://dx.doi.org/10.20855/ijav.2020.25.11499.

Der volle Inhalt der Quelle

Annotation:

A seismic analysis of ground-supported, three-dimensional (3-D) rigid-base steel cylindrical liquid storage tank is investigated, using a coupled acoustic-structural finite element (FE) method for fluid-structure interaction (FSI). In this method, the contained liquid in the tank is modelled using acoustic elements and the cylindrical tank is modelled using shell elements. The impulsive and convective terms are estimated separately by using the appropriate boundary conditions on the free surface of the liquid. The convergence and validation studies of the proposed FE model are conducted by comparing the results reported in the literature. The parametric studies are performed for rigid and flexible tanks for the varying slenderness of the open roof tanks. The sloshing displacement and base shear time history responses are evaluated for the 3-D tanks subjected to harmonic unidirectional ground motions. Further, the results are compared with the commonly used two and three lumped-mass models of the tank. Moreover, the seismic response quantities of the tank subjected simultaneously to the bi-directional horizontal components of earthquake ground motion are also investigated using the 3-D FE model, and the response quantities are compared with the lumped-mass models. The results obtained from the 3-D FE model and lumped-mass model are in close agreement. The average percentage difference in the 3-D FE and lumped-mass models for maximum sloshing displacement prediction is 15 percent to 20 percent and that for the base shear is about 4 to 10 percent, in the case of the uni-directional harmonic ground motions. It is concluded that the sloshing displacement is not affected by the tank flexibility, but the impulsive hydrodynamic pressure and the impulsive component of the base shear increases with the tank flexibility.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

34

Burkacki, Daniel, Michał Wójcik und Robert Jankowski. „The modal analysis of cylindrical steel tank with selfsupported roof filled with different level of liquid“. Budownictwo i Architektura 12, Nr. 2 (11.06.2013): 205–12. http://dx.doi.org/10.35784/bud-arch.2132.

Der volle Inhalt der Quelle

Annotation:

In technical branches, such as chemical or petroleum industries, cylindrical steel tanks are essential structures used for storage of liquid products. Therefore, their safety and reliability is essential, because any failure might have dangerous consequences, in extreme cases may even lead to an environmental disaster. The aim of the presented paper is to show the results of the modal analysis concerning the cylindrical steel tank with self-supported roof which has been constructed in northern Poland. The investigation was carried out with the use of the FEM commercial computer program Abaqus. The values of natural frequencies, as well as the natural modes, for different levels of liquid filling (empty tank, partly filled and tank fully filled) were determined in the study. The results of the study clearly indicate that the increase in the liquid level leads to the substantial decrease in the natural frequencies of the structure.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

35

Jendzelovsky, Norbert, und Lubomír Baláž. „Numerical Modeling of Cylindrical Tank and Compare with Experiment“. Applied Mechanics and Materials 617 (August 2014): 148–51. http://dx.doi.org/10.4028/www.scientific.net/amm.617.148.

Der volle Inhalt der Quelle

Annotation:

This paper deals with a problem of eigenfrequencies of cylindrical tank (steel water tank). For an ANSYS analysis of eigenfrequencies some numerical models of cylindrical tank are used and finally results got by these models are compared with experimental results in laboratory. In final part of the paper some crucial results are presented both in a graphical and numerical way.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

36

Kotrasova, Kamila, und Ivan Grajciar. „Dynamic Analysis of Liquid Storage Cylindrical Tanks due to Earthquake“. Advanced Materials Research 969 (Juni 2014): 119–24. http://dx.doi.org/10.4028/www.scientific.net/amr.969.119.

Der volle Inhalt der Quelle

Annotation:

Ground-supported tanks are used to store a variety of liquids. This paper provides theoretical background of seismic design of liquid storage ground-supported circular tanks. During earthquake activity the liquid exerts impulsive and convective (sloshing) actions on the walls and bottom of the circular tank. Seismic response was calculated by using the seismic response spectrum. Knowledge of these inner forces is important for design of reservoirs.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

37

Šapalas, Antanas, Gintas Šaučiuvėnas, Konstantin Rasiulis, Mečislovas Griškevičius und Tomas Gečys. „BEHAVIOUR OF VERTICAL CYLINDRICAL TANK WITH LOCAL WALL IMPERFECTIONS“. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 25, Nr. 3 (29.03.2019): 287–96. http://dx.doi.org/10.3846/jcem.2019.9629.

Der volle Inhalt der Quelle

Annotation:

Design of modern thin-walled metal structures is widely used around the world. In recent decades, more comprehensive research is carried out to investigate the behaviour of various thin-walled structures. Generally, the structure with regular geometry is investigated. In various countries such as USA, Russia, and the European Union issued the standards on regulation of the construction, design and maintenance of thin-walled structures. The actually used period of tanks usually is longer than recommendatory period. Recommendatory maintenance period of metal tanks is 15–20 years. Therefore, for such structures one of the most considerable questions is the residual load bearing capacity beyond the end of the maintenance period. This phase of using of structures is associated with complex investigation and numerical analysis of thin-walled structures. In this paper the load bearing capacity of the steel wall of the existing over-ground vertical cylindrical tank in volume of 5,000 m3 with a single defect and with a few contiguous local defects of the shape is analyzed. Calculations carried out are taking into account all the imperfections of the wall geometry. A major goal of the research – developing a realistic numerical model of the object analyzed, taking into account all the imperfections, determining the wall stress and strain state, exploring the places of extreme points, calculating the residual load bearing capacity of the tank and scrutinizing possible strengthening schemes for defective areas.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

38

Araki, Susumu, Wataru Kunimatsu, Shunyo Kitaguchi, Shun Iwasaki und Shin-ichi Aoki. „EXPERIMENTAL STUDY ON BORE WAVE PRESSURE ACTING ON STORAGE TANK“. Coastal Engineering Proceedings, Nr. 36 (30.12.2018): 44. http://dx.doi.org/10.9753/icce.v36.structures.44.

Der volle Inhalt der Quelle

Annotation:

Storage tanks located in coastal areas can be damaged by tsunami. The damage can lead a spill of gas or oil, which cause an extensive fire. Another huge tsunami triggered by earthquake is predicted to strike Japan in the near future. Therefore, tsunami wave load acting on storage tanks has to be investigated. The authors have investigated the characteristics of tsunami wave load acting on a storage tank (Araki et al., 2017a; 2017b). In this study, bore wave pressure acting on a cylindrical storage tank was measured. The characteristic of the pressure was discussed.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

39

Moeini, Morteza, und Mohammad Ali Goudarzi. „Seismic damage criteria for a steel liquid storage tank shell and its interaction with demanded construction material“. Bulletin of the New Zealand Society for Earthquake Engineering 51, Nr. 2 (30.06.2018): 70–84. http://dx.doi.org/10.5459/bnzsee.51.2.70-84.

Der volle Inhalt der Quelle

Annotation:

In this paper, the relation between the steel cylindrical tank geometry and the governing critical damage mode of the tank shell is numerically determined for all practical ranges of liquid storage tanks (aspect ratio H/D = 0.2 to 2). In addition, the interaction between the seismic intensity, soil type, acceptable seismic risk and tank geometry along with the extra material demanded by the seismic loads is examined based on the provisions of major codes. The importance of seismic factors on the economics of the design of a liquid tank in zones with high seismic activity is comprehensively discussed. In this regard, an empirical relation to estimate the steel volume required for specific seismic conditions and tank geometries is proposed based on the results of analysis.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

40

Park, Young-IL, Jin-Seong Cho und Jeong-Hwan Kim. „Structural Integrity Assessment of Independent Type-C Cylindrical Tanks Using Finite Element Analysis: Comparative Study Using Stainless Steel and Aluminum Alloy“. Metals 11, Nr. 10 (14.10.2021): 1632. http://dx.doi.org/10.3390/met11101632.

Der volle Inhalt der Quelle

Annotation:

The International Maritime Organization stipulates that greenhouse gas emissions from ships should be reduced by at least 50% relative to the amount observed in 2008. Consequently, the demand for liquefied natural gas (LNG)-fueled ships has increased significantly. Therefore, an independent type-C cylindrical tank, which is typically applied as an LNG fuel tank, should be investigated. In this study, structural integrity assessments using finite element analysis are performed on C-type LNG fuel tanks for a sea-cleaning vessel. In addition, the applicability of stainless steel and aluminum alloys is evaluated for LNG tank construction. Structural analyses and fatigue limit evaluations, including heat transfer analyses for the tank based on IGC code requirements, are performed, and the results are compared. The results of this study are expected to facilitate the selection of materials used for independent type-C tanks.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

41

Lu, Shengzhuo, Wei Wang, Weidong Chen, Jingxin Ma, Yaqin Shi und Chunlong Xu. „Behaviors of Thin-Walled Cylindrical Shell Storage Tank under Blast Impacts“. Shock and Vibration 2019 (14.08.2019): 1–21. http://dx.doi.org/10.1155/2019/6515462.

Der volle Inhalt der Quelle

Annotation:

Large steel storage tanks designed with long-span structures, employed for storing oil and fuel, have been widely used in many countries over the past twenty years. Most of these tanks are thin-walled cylindrical shells. Owing to the high risk of gas explosions and the resulting deaths, injuries, and economic losses, more thorough damage analyses of these large structures should be conducted. This study examines the structural response of a simplified steel storage tank under a blast impact, as calculated by the LS-DYNA software package. The numerical results are then compared with a scale-model experiment. On that basis, the simplified storage tank prototype, which has a 15 × 104 m3 capacity, is analyzed using numerical simulation. In this study, we address issues around the variation in structural responses—particularly of the failure mode, resultant displacement, structural energy, and dynamic strain under the impact. In addition, we also discuss the effects of varying the internal liquid level, constraint conditions, and blast intensity.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

42

Liu, De Yu, und Zhou Fang. „Dynamic Experimental Investigation on the Fundamental Frequency of Liquid Storage Tanks under Seismic Excitations“. Applied Mechanics and Materials 477-478 (Dezember 2013): 81–85. http://dx.doi.org/10.4028/www.scientific.net/amm.477-478.81.

Der volle Inhalt der Quelle

Annotation:

A large-scale earthquake simulation experiment about the unanchored cylindrical steel liquid storage model tanks has been completed. The fundamental frequency of the model tank with liquid inside was investigated based on the experimental data of the acceleration dynamic response. The seismic table test, the analysis methods are designed and conducted, and experimental results of the model tank were carefully measured. Furthermore, national design standard was used to calculate the fundamental frequency of the model tank system. The reasons for the existence of consistency and differences between the results obtained from experiments and national design standard were discussed.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

43

Eshghi, Sassan, und Mehran S. Razzaghi. „Performance of cylindrical liquid storage tanks in Silakhor, Iran earthquake of March 31, 2006“. Bulletin of the New Zealand Society for Earthquake Engineering 40, Nr. 4 (31.12.2007): 173–82. http://dx.doi.org/10.5459/bnzsee.40.4.173-182.

Der volle Inhalt der Quelle

Annotation:

Several on-ground cylindrical liquid storage tanks experienced strong ground motion during the “Silakhor” earthquake of March 31, 2006 in western Iran, and some of the tanks suffered minor to moderate damage. In this study two of the affected tanks that were located close to the station of recording the time history of the earthquake were investigated. Responses of these tanks to the earthquake were estimated using published methods and also non-linear time history analysis, for both rigid foundation and flexible foundation assumptions. Theoretical results were compared and were generally in good agreement with the observed performance of tanks during the earthquake. For the broad tank uplift displacements observed from the earthquake matched quite closely the predictions of numerical analysis and some of the published methods, although there was a significant variation in the predictions of various methods. It was also shown that axial stresses in tank shells uplifting under earthquake are very dependent on the rigidity of the foundation.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

44

Lau, David T., und Xianguang Zeng. „Nonlinear behaviour of bottom plate in cylindrical liquid storage tanks for seismic applications“. Canadian Journal of Civil Engineering 22, Nr. 1 (01.02.1995): 180–89. http://dx.doi.org/10.1139/l95-016.

Der volle Inhalt der Quelle

Annotation:

The paper presents a simplified pseudostatic approach to model the nonlinear behaviour of the bottom plate in unanchored cylindrical liquid storage tanks for seismic applications. In this paper, the problem of axisymmetric uplift of the bottom plate is studied for tanks supported on both rigid and elastic Winkler foundations. In the analysis, the bottom plate is modelled by one-dimensional beam and two-dimensional plate models. By comparing the results, it is found that the one-dimensional beam model gives accurate results acceptable for all practical design purposes, in view of the many other uncertainties in the tank uplift problem. The analysis results also show that the support foundation flexibility may have significant effects on the uplift behaviour of the tanks. Based on the axisymmetric uplift results, the paper then presents a simple approach to model the seismic partial uplift problem of unanchored tanks by means of nonlinear springs. Modelling parameters for the nonlinear springs are generated for dynamic uplift response analysis. Sensitivities of the uplift behaviour and the nonlinear spring modelling parameters to the tank height-to-radius ratio and the soil stiffness are also studied. Key words: axisymmetric uplift, cylindrical tanks, earthquakes, pressure vessel, shell, soil effect.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

45

Burak, Kostyantyn, Vitaliy Kovtun und Mary Nychvyd. „BUILDING 3D SURFACES OF LAND STORAGE VERTICAL CYLINDRICAL STEEL TANK USING BICUBIC SPLINE INTERPOLATION“. Geodesy and cartography 45, Nr. 2 (03.09.2019): 85–91. http://dx.doi.org/10.3846/gac.2019.6301.

Der volle Inhalt der Quelle

Annotation:

The purpose of this work is to increase the accuracy, quality and information content of geodetic surveys of vertical steel tanks by using modern geodetic equipment and creating algorithms for data processing of these observations. Method. In order to increase the information content of data for straightening, it is proposed to calculate the geometric parameters of vertical steel tanks not only in places where data are directly obtained through instrumental observations, but also at any point of the 3D surface of the tank. The paper describes an algorithm for creating a 3D surface of a tank by bicubic spline interpolation (BSI). Results on the basis of the conducted research, it was established that the developed algorithm could be used and the 3D-surface spatial coordinates were determined. The method of determining the geometric parameters of vertical steel tanks by using BSI is improved. Scientific novelty and practical significance. Bicubic spline interpolation (BSI) was used for the first time. It greatly increases the accuracy and informality of the results of the control. The practical significance is confirmed by the control of the geometric parameters of a vertical cylindrical steel tank with a nominal capacity of 75.000 m3 with a floating roof and a double wall of the LODS “Brody” company.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

46

Kolaei, Amir, und Subhash Rakheja. „Free vibration analysis of coupled sloshing-flexible membrane system in a liquid container“. Journal of Vibration and Control 25, Nr. 1 (01.05.2018): 84–97. http://dx.doi.org/10.1177/1077546318771221.

Der volle Inhalt der Quelle

Annotation:

A finite element model is developed to study free vibration of a liquid in a tank of arbitrary geometry with a flexible membrane constraining the liquid free-surface. A variational formulation is initially developed using the Galerkin method, assuming inviscid, incompressible and irrotational flow. The resulting generalized eigenvalue problem is then reduced by considering only the elements on the liquid free-surface, which significantly reduces the computational time. The proposed physical model is subsequently implemented into the FEniCS framework to obtain coupled hydroelastic liquid-membrane frequencies and modes. The coupled frequencies are compared with those reported for rectangular and upright cylindrical tanks using analytical methods in order to illustrate the validity of the finite element model. The results are subsequently presented for a horizontal cylindrical tank with an elastic free-surface membrane for different fill ratios and tank lengths. The effects of the membrane tension on the free vibration of the liquid in the tank are further investigated by comparing the coupled liquid-membrane frequencies with slosh frequencies of the liquid alone. It is shown that sloshing frequencies can be effectively shifted to higher values to prevent resonance in partially filled moving containers.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

47

Nippert, Charles, Rebecca Coburn, Brendan Shea, Michael Roth, Clinton Harrell und Edward Owusu. „Adaptive Control of a Non-Cylindrical Tank“. International Journal of Online Engineering (iJOE) 9, Nr. 2 (27.04.2013): 50. http://dx.doi.org/10.3991/ijoe.v9i2.2546.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

48

Delosevic, M., S. Sremac und G. Tepić. „Reliability of cylindrical tank exposed to fire“. IOP Conference Series: Materials Science and Engineering 659 (31.10.2019): 012003. http://dx.doi.org/10.1088/1757-899x/659/1/012003.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

49

Gorochov, Yevgeny, Vladimir Muschanov, Alexander Kulik und Alexander Tsyplukhin. „Vertical cylindrical tank with angular geometrical imperfection“. Journal of Civil Engineering and Management 11, Nr. 3 (Januar 2005): 175–83. http://dx.doi.org/10.1080/13923730.2005.9636348.

Der volle Inhalt der Quelle

APA, Harvard, Vancouver, ISO und andere Zitierweisen

50

Gorochov, Yevgeny, Vladimir Muschanov, Alexander Kulik und Alexander Tsyplukhin. „VERTICAL CYLINDRICAL TANK WITH ANGULAR GEOMETRICAL IMPERFECTION“. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 11, Nr. 3 (30.09.2005): 175–83. http://dx.doi.org/10.3846/13923730.2005.9636348.

Der volle Inhalt der Quelle

Annotation:

In this paper the results of experimental research are given for the stress and strain state of a near seam zone. The research is executed on large‐scale model of a zone of vertical cylindrical tank assembly connection with a geometrical imperfection. As a result, the dependence is received between values of the basic stress, which take place in a tank wall of the ideal form, and local stress, which arise in a seam zone. It is proved by experiments that when the ring stress achieves value 100 mPa, then the local stress in a near seam zone achieves the stress of 280–300 mPa. Hence, they exceed three times their major importance. These stress values are coordinated satisfactorily to the data, which are received by a theoretical way.

APA, Harvard, Vancouver, ISO und andere Zitierweisen

Zeitschriftenartikel zum Thema „Cylindrical Tank“

Geben Sie eine Quelle nach APA, MLA, Chicago, Harvard und anderen Zitierweisen an