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Journal articles on the topic 'Semi-displacement'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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Li, Hong Liang. "Green's Function Solution of the Semi-Cylindrical Gap with Multiple Shallow-Buried Inclusions." Advanced Materials Research 261-263 (May 2011): 863–67. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.863.

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In mechanical engineering, earthquake engineering and modern municipal construction, semi-cylindrical gap and shallow-buried inclusion structure are used widely. In this paper, Green's Function is studied, which is the solution of displacement field for elastic semi-space with semi-cylindrical gap and multiple shallow-buried inclusions while bearing anti-plane harmonic line source force at any point. In the complex plane, considering the symmetry of SH-wave scattering , the displacement field aroused by the anti-plane harmonic line source force and the scattering displacement field impacted by semi-cylindrical gap and multiple cylindrical inclusions comprised of Fourier-Bessel series with undetermined coefficients which satisfies the stress-free condition on the ground surface are constructed. Through applying the method of multi-polar coordinate system, the equations with unknown coefficients can be obtained by using the displacement and stress condition of the cylindrical inclusion in the radial direction. According to orthogonality condition for trigonometric function, these equations can be reduced to a series of algebraic equations. Then the value of the unknown coefficients can be obtained by solving these algebraic equations. Green's function, that is, the total wave displacement field is the superposition of the displacement field aroused by the anti-plane harmonic line source force and the scattering displacement field. By using the expressions, an example is provided to show the effect of the change of relative location of semi-cylindrical gap , the cylindrical inclusions and the location of the line source force. Based on this solution, the problem of interaction of semi-cylindrical gap , multiple cylindrical inclusions and a linear crack in semi-space can be investigated further.

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Yoo, Jung Hun, Heung Seok Kim, and Tae Hee Lee. "Displacement-Load Method for Semi-Analytical Design Sensitivity Analysis." Transactions of the Korean Society of Mechanical Engineers A 28, no. 10 (2004): 1590–97. http://dx.doi.org/10.3795/ksme-a.2004.28.10.1590.

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Hetharia, Wolter R. "Preliminary Study on Stability Parameters of Semi-Displacement Ships." Applied Mechanics and Materials 874 (January 2018): 105–13. http://dx.doi.org/10.4028/www.scientific.net/amm.874.105.

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Semi-displacement passenger ships operate at the speed range of 19 to 23 knots or Froude number Fn of 0.50 to 0.75. Those ships need higher engine power to maintain their speeds. The efforts should be made to minimize their higher engine powers. Most experts worked to minimize the engine power for most merchant ships. In their works, the initial metacentric (GMO) at departure condition was taken as constraint to represent stability parameters. However, this is not a general case for semi-displacement passenger ships. In this study, a parent semi-displacement passenger was designed and modified. Stability parameters were computed and evaluated as required by the rules IMO-HSC. In addition, one existing high speed passenger ship was evaluated for stability evaluation as reference also. It was found that the stability parameters at large angles of inclination such as: weather criterion, angle of GZmaxand others are more critical compared to GM0. Also, the stability parameters when ship is at arrival condition are more critical compared to those at departure condition. The study resumed that the application of criterion GM0≥ 0.15 m at optimization process of semi-displacement passenger ships should be considered again for the future.

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Csébfalvi, Anikó. "Displacement based moment distribution method for semi-rigid frames." Pollack Periodica 2, no. 3 (2007): 109–25. http://dx.doi.org/10.1556/pollack.2.2007.3.10.

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Spinu, S., and D. Gradinaru. "Semi-analytical computation of displacement in linear viscoelastic materials." IOP Conference Series: Materials Science and Engineering 95 (November 3, 2015): 012111. http://dx.doi.org/10.1088/1757-899x/95/1/012111.

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Li, Hong Liang, Jing Guo, and Li Ming Cai. "Scattering of Anti-Plane SH-Wave by the Semi-Cylindrical Gap with Multiple Shallow-Buried Inclusions in Elastic Semi-Space." Advanced Materials Research 569 (September 2012): 78–81. http://dx.doi.org/10.4028/www.scientific.net/amr.569.78.

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Semi-cylindrical gap and Multiple circular inclusions exists widely in natural media, composite materials and modern municipal construction. The scattering field produced by semi-cylindrical gap and multiple circular inclusions determines the dynamic stress concentration factor around the gap and circular inclusions, and therefore determines whether the material is damaged or not. These problems are complicated. It is hard to obtain analytic solutions except for several simple conditions. In this paper, the solution of displacement field for elastic semi-space with semi-cylindrical gap and multiple cylindrical inclusions by anti-plane SH-wave is constructed. In complex plane, considering the symmetry of SH-wave scattering , the displacement field aroused by the anti-plane SH-wave and the scattering displacement field impacted by the gap and the cylindrical inclusions comprised of Fourier-Bessel series with undetermined coefficients which satisfies the stress-free condition on the ground surface are constructed. Through applying the method of multi-polar coordinate system, the equations with unknown coefficients can be obtained by using the displacement and stress condition around the edge of the gap and cylindrical inclusions. According to orthogonality condition for trigonometric function, these equations can be reduced to a series of algebraic equations. Then the value of the unknown coefficients can be obtained by solving these algebraic equations. The total wave displacement field is the superposition of the displacement field aroused by the anti-plane SH-wave and the scattering displacement field. By using the expressions, an example is provided to show the effect of the change of relative location of the cylindrical inclusions.

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Zhang, Rui, and Hong Liang Li. "Interaction of Multiple Semi-Cylindrical Gaps and a Shallow-Buried Cavity." Advanced Materials Research 163-167 (December 2010): 3910–13. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.3910.

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In modern municipal construction and earthquake engineering, semi-cylindrical gap and shallow-buried cavity structure are used widely. In this paper, the solution of displacement field for elastic semi-space with multiple semi-cylindrical gaps and a shallow-buried cavity while bearing anti-plane harmonic line source force at any point is studied. In the complex plane, considering the symmetry of SH-wave scattering , the displacement field aroused by the anti-plane harmonic line source force and the scattering displacement field impacted by multiple semi-cylindrical gaps and a cylindrical cavity comprised of Fourier-Bessel series with undetermined coefficients which satisfies the stress-free condition on the ground surface are constructed. Through applying the method of multi-polar coordinate system, the equations with unknown coefficients can be obtained by using the stress-free condition of the gaps and the cylindrical cavity in the radial direction. According to orthogonality condition for trigonometric function, these equations can be reduced to a series of algebraic equations. Then the value of the unknown coefficients can be obtained by solving these algebraic equations. The total wave displacement field is the superposition of the displacement field aroused by the anti-plane harmonic line source force and the scattering displacement field. By using the expressions, an example is provided to show the effect of the change of relative location of semi-cylindrical gaps , the cylindrical cavity and the location of the line source force. Based on this solution, the problem of interaction of multiple semi-cylindrical gaps , a cylindrical cavity and a linear crack in semi-space can be investigated further.

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Wang, Gang. "Stress Impact Analysis of Steel Frame with Different Beam-Column Connection Mode." Applied Mechanics and Materials 275-277 (January 2013): 1028–33. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.1028.

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This paper uses the SAP2000 to establish different beam column connections of steel frame structure finite element model, comparative analysis of the beam column for the rigid connection, hinged, semi-rigid connections of steel frame structure, the dynamic characteristics of structure displacement and internal force influence. At the same time, the dynamic time-history analysis method for structural displacement supplementary checking, analysis of structural response to seismic wave degree．The results showed that：compared with rigid, the structure of semi-rigid connections to the larger natural period，and with the rotation stiffness decreases vibration period increases; Semi-rigid steel frame connection to reduce the resistance to push the layer stiffness，making the structure of the horizontal displacement increased．

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Li, Hong Liang, and Dan Sun. "Interaction of Semi-Cylindrical Gap and Multiple Shallow-Buried Cavities and Inclusions." Applied Mechanics and Materials 157-158 (February 2012): 1361–64. http://dx.doi.org/10.4028/www.scientific.net/amm.157-158.1361.

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In mechanical engineering, earthquake engineering and modern municipal construction, It can be found that there are shallow-buried cavity or inclusion structure everywhere. In this paper, Green's Function is studied, which is the solution of displacement field for elastic semi-space with semi-cylindrical gap and multiple shallow-buried cavities and inclusions while bearing anti-plane harmonic line source force at any point. In the complex plane, considering the symmetry of SH-wave scattering, the displacement field aroused by the anti-plane harmonic line source force and the scattering displacement field impacted by semi-cylindrical gap and multiple cylindrical cavities and inclusions are constructed. Through applying the method of multi-polar coordinate system, the equations with unknown coefficients can be obtained by using the stress or displacement condition of the cylindrical cavities and inclusions in the radial direction. According to orthogonality condition for trigonometric function, these equations can be reduced to a series of algebraic equations. By solving these algebraic equations the value of the unknown coefficients can be obtained. So the total wave displacement field could be got. By using the expressions, an example is provided to show the effect of the change of relative location of semi-cylindrical gap, the cylindrical cavities and inclusions and the location of the line source force.

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Yasukawa, Hironori, Noritaka Hirata, and Yoshiyuki Nakayama. "Maneuverability of a Semi-Displacement Typed High Speed Mono-Hull." Journal of the Japan Society of Naval Architects and Ocean Engineers 19 (2014): 47–59. http://dx.doi.org/10.2534/jjasnaoe.19.47.

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Vigh, Gy, Z. Varga-Puchony, G. Szepesi, and M. Gazdag. "Semi-preparative high-performance reversed-phase displacement chromatography of insulins." Journal of Chromatography A 386 (January 1987): 353–62. http://dx.doi.org/10.1016/s0021-9673(01)94612-6.

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KOBAYASHI, Tomohiro, Kazuki SUGITA, and Noriko UMEMIYA. "A STUDY ON SEMI-DISPLACEMENT VENTILATION USING IMPINGING JET FLOW." Journal of Environmental Engineering (Transactions of AIJ) 81, no. 730 (2016): 1117–25. http://dx.doi.org/10.3130/aije.81.1117.

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Loh, Chin-Hsiung, L. Y. Wu, and P. Y. Lin. "Displacement control of isolated structures with semi-active control devices." Journal of Structural Control 10, no. 2 (2003): 77–100. http://dx.doi.org/10.1002/stc.18.

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Pirmoz, Akbar, and Min (Max) Liu. "Direct displacement-based seismic design of semi-rigid steel frames." Journal of Constructional Steel Research 128 (January 2017): 201–9. http://dx.doi.org/10.1016/j.jcsr.2016.08.015.

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Sadat Kholerdi, S. Ebrahim, and Alireza Jahanpour. "Bilinear Load–Displacement Curve of Semi-supported Steel Shear Walls." International Journal of Steel Structures 20, no. 2 (2019): 504–24. http://dx.doi.org/10.1007/s13296-019-00301-8.

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Sun, Hui, and Odd M. Faltinsen. "Hydrodynamic forces on a semi-displacement ship at high speed." Applied Ocean Research 34 (January 2012): 68–77. http://dx.doi.org/10.1016/j.apor.2011.10.001.

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Kim, Dong Hwan, Moon-Chul Choi, and Joo-Hoon Baek. "Performance Verification of Semi-Active and Active Impact Control Systems." Journal of Vibration and Control 10, no. 6 (2004): 811–36. http://dx.doi.org/10.1177/1077546304036612.

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A semi-actively controlled impact systemis studied, which adjusts an impulse exerted by the external impact. Also, an active impact control system using a servo valve is introduced, and these performances are compared. The systems should respond to the extremely short impulse and control the impulse within a highly fast interval. Both the semi-active and the active control systems utilize an external orifice in the form of a proportional valve or a servo valve, which adjusts its opening area to control the pressure and piston displacement. These devices overcome the temperature and viscosity variations due to continuant operations, and keep the desired pressure difference and the displacement at a desirable level. In this work, two prototypic impact systems controlled by semi-active and full active operations are designed and manufactured. Through computer simulations and experiments, the possibility of controlling the pressure and displacement of an impact control system is verified.

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Hazaveh, Nikoo K., Geoffrey W. Rodgers, J. Geoffrey Chase, and Stefano Pampanin. "Passive direction displacement dependent damping (D3) device." Bulletin of the New Zealand Society for Earthquake Engineering 51, no. 2 (2018): 105–12. http://dx.doi.org/10.5459/bnzsee.51.2.105-112.

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Viscous fluid damping has been used worldwide to provide energy dissipation to structures during earthquakes. Semi-active dissipation devices have also shown significant potential to re-shape structural hysteresis behaviour and thus provide significant response and damage reduction. However, semi-active devices are far more complex and costly than passive devices, and thus potentially less robust over time. Ideally, a passive device design would provide the unique response behaviour of a semi-active device, but in a far more robust and low-cost device. This study presents the design, development and characterization of a passive Direction and Displacement Dependent viscous damping (D3) device. It can provide viscous damping in any single quadrant of the force-displacement hysteresis loop and any two in combination. Previously, this behaviour could only be obtained with a semi-active device. The D3 device is developed from a typical viscous damper, which is tested to evaluate the baseline of orifice sizing, force levels and velocity dependence. This prototype viscous damper is then modified in clear steps to produce a device with the desired single quadrant hysteresis loop. The overall results provide the design approach, device characterization and validation for this novel device design.

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SHIH, Ming-Hsiang, and Wen-Pei SUNG. "THE ENERGY DISSIPATION BEHAVIOR OF DISPLACEMENT DEPENDENT SEMI-ACTIVE HYDRAULIC DAMPER." STRUCTURAL ENGINEERING / EARTHQUAKE ENGINEERING 21, no. 2 (2004): 121s—129s. http://dx.doi.org/10.2208/jsceseee.21.121s.

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Lee, Min-Uk, Jung-Hun Yoo, and Tae-Hee Lee. "Consistent Displacement Load Method for Nonlinear Semi-Analytical Design Sensitivity Analysis." Transactions of the Korean Society of Mechanical Engineers A 29, no. 9 (2005): 1209–16. http://dx.doi.org/10.3795/ksme-a.2005.29.9.1209.

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SHIH, Ming-Hsiang, and Wen-Pei SUNG. "THE ENERGY DISSIPATION BEHAVIOR OF DISPLACEMENT DEPENDENT SEMI-ACTIVE HYDRAULIC DAMPER." Doboku Gakkai Ronbunshu, no. 773 (2004): 9–17. http://dx.doi.org/10.2208/jscej.2004.773_9.

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Arzanpour, S., and M. F. Golnaraghi. "A Novel Semi-active Magnetorheological Bushing Design for Variable Displacement Engines." Journal of Intelligent Material Systems and Structures 19, no. 9 (2008): 989–1003. http://dx.doi.org/10.1177/1045389x07082380.

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Go, Cheer-Germ, Chung-Huan Sui, Ming-Hsiang Shih, and Wen-Pei Sung. "A Linearization Model for the Displacement Dependent Semi-active Hydraulic Damper." Journal of Vibration and Control 16, no. 14 (2010): 2195–214. http://dx.doi.org/10.1177/1077546309349433.

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Kalász, Huba, Sándor Hosztafi, Tamás Csermely, Henrik Götz, and Marián G. Szabó. "Displacement Thin Layer Chromatography of Morphine and Its Semi-Synthetic Derivatives." Journal of Liquid Chromatography & Related Technologies 19, no. 1 (1996): 23–35. http://dx.doi.org/10.1080/10826079608006287.

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Kobayashi, Yoshiyuki. "T03 Consideration of the displacement of gas-piston in Semi-Fluidyne." Proceedings of the Symposium on Stirlling Cycle 2015.18 (2015): 67–68. http://dx.doi.org/10.1299/jsmessc.2015.18.67.

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Gaudio, D., R. Rauseo, L. Masini, and S. Rampello. "Semi-empirical relationships to assess the seismic performance of slopes from an updated version of the Italian seismic database." Bulletin of Earthquake Engineering 18, no. 14 (2020): 6245–81. http://dx.doi.org/10.1007/s10518-020-00937-6.

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Abstract Seismic performance of slopes can be assessed through displacement-based procedures where earthquake-induced displacements are usually computed following Newmark-type calculations. These can be adopted to perform a parametric integration of earthquake records to evaluate permanent displacements for different slope characteristics and seismic input properties. Several semi-empirical relationships can be obtained for different purposes: obtaining site-specific displacement hazard curves following a fully-probabilistic approach, to assess the seismic risk associated with the slope; providing semi-empirical models within a deterministic framework, where the seismic-induced permanent displacement is compared with threshold values related to different levels of seismic performance; calibrating the seismic coefficient to be used in pseudo-static calculations, where a safety factor against limit conditions is computed. In this paper, semi-empirical relationships are obtained as a result of a parametric integration of an updated version of the Italian strong-motion database, that, in turn, is described and compared to older versions of the database and to well-known ground motion prediction equations. Permanent displacement is expressed as a function of either ground motion parameters, for a given yield seismic coefficient of the slope, or of both ground motion parameters and the seismic coefficient. The first are meant to be used as a tool to develop site-specific displacement hazard curves, while the last can be used to evaluate earthquake-induced slope displacements, as well as to calibrate the seismic coefficient to be used in a pseudo-static analysis. Influence of the vertical component of seismic motion on these semi-empirical relationships is also assessed.

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Wang, Hui Wen, Zai Lin Yang, and Hua Nan Xu. "Dynamic Stress Concentration Analysis of Multiple Circular Cavities near Multiple Semi-Cylindrical Alluvial Valleys." Applied Mechanics and Materials 121-126 (October 2011): 3253–57. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.3253.

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The problem of dynamic response of multiple circular cavities near multiple semi-cylindrical alluvial valleys under incident plane SH-waves is investigated by the methods of complex function and multi-polar coordinates in this paper. Firstly, the solution domain is divided into two parts, Domain I is multiple semi-cylindrical alluvial valleys, and Domain Ⅱ is an elastic half space with several subsurface circular cavities near multiple semi-cylindrical alluvial valleys. A series of infinite algebraic equations is then obtained based on the displacement and stress continuity condition on “common boundary” of two parts after constructing the associated displacement and stresses expressions of each part. Finally some numerical expamples are prensented and dynamic response of subsurface circular cavities near semi-cylindrical alluvial valleys with respect to different parameters is discussed.

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Wu, Guo Hui, and Hong Liang Li. "Green's Function Solution of the Semi-Space with Double Shallow-Buried Inclusions." Key Engineering Materials 462-463 (January 2011): 518–23. http://dx.doi.org/10.4028/www.scientific.net/kem.462-463.518.

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In mechanical engineering and modern municipal construction, shallow-buried inclusion structure is used widely. In this paper, Green's Function is studied, which is the solution of displacement field for elastic semi-space with double shallow-buried inclusions while bearing anti-plane harmonic line source force at any point. In complex plane, considering the symmetry of SH-wave scattering , the displacement field aroused by the anti-plane harmonic line source force and the scattering displacement field impacted by the circle inclusions comprised of Fourier-Bessel series with undetermined coefficients which satisfies the stress-free condition on the ground surface are constructed. Through applying the method of multi-polar coordinate system, the equations with unknown coefficients can be obtained by using the displacement and stress condition of the circle inclusions in the radial direction. According to orthogonality condition for trigonometric function, these equations can be reduced to a series of algebraic equations. Then the value of the unknown coefficients can be obtained by solving these algebraic equations. Green's function, that is, the total wave displacement field is the superposition of the displacement field aroused by the anti-plane harmonic line source force and the scattering displacement field. By using the expressions, an example is provided to show the effect of the change of relative location of the circle inclusions and the location of the line source force. Based on this solution, the problem of interaction of double circular inclusions and a linear crack in semi-space can be investigated further.

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Li, Hong Liang, Rui Zhang, and Hao Zhang. "Interaction of Multiple Cylindrical Cavities and Fixed Surface in Elastic Semi-Space." Materials Science Forum 813 (March 2015): 147–51. http://dx.doi.org/10.4028/www.scientific.net/msf.813.147.

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In natural medium, engineering materials and structures, it can be found that there are cavities everywhere. Sometimes the surface of the structure is fixed, and it could be seen as a rigid line. When structure is impacted by dynamic load, the scattering field will be produced because of the cavities and the fixed surface, and it could cause dynamic stress concentration at the edge of the cavities. In this paper, the solution of displacement field for elastic semi-space with fixed surface and multiple cylindrical cavities by anti-plane SH-wave is constructed. In complex plane, considering the displacement boundary condition of the fixed surface, the displacement field aroused by the anti-plane SH-wave and the scattering displacement field impacted by the cylindrical cavities comprised of Fourier-Bessel series with undetermined coefficients are constructed. Through applying the method of multi-polar coordinate system, the equations with unknown coefficients can be obtained by using the stress free condition of the cylindrical cavities in the radial direction. According to orthogonality condition for trigonometric function, these equations can be reduced to a series of algebraic equations. Then the value of the unknown coefficients can be obtained by solving these algebraic equations. The total wave displacement field is the superposition of the displacement field aroused by the anti-plane SH-wave and the scattering displacement field. By using the expressions, an example is provided to show the effect of the change of relative location of the cylindrical cavities. Based on this solution, the problem of interaction of multiple cylindrical cavities and a linear crack in semi-space with fixed surface can be investigated further.

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Wang, Hui Wen, Xiao Juan Sun, and Zai Lin Yang. "Scattering of Subsurface Cylindrical Cavity near Multiple Semi-Cylindrical Alluvial Valleys under Incident SH-Waves." Advanced Materials Research 374-377 (October 2011): 1285–90. http://dx.doi.org/10.4028/www.scientific.net/amr.374-377.1285.

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The scattering of subsurface cylindrical cavity near multiple semi-cylindrical alluvial valleys under incident SH waves is studied in this paper by using methods of auxiliary function, complex function multi-polar coordinates. The model is divided into two parts, Domain I is multiple semi-cylindrical alluvial valleys, and Domain Ⅱ is an elastic half space with several subsurface circular cavities near multiple semi-cylindrical alluvial valleys. A series of infinite algebraic equations is then obtained based on the displacement and stress continuity condition on “common boundary” of two parts after constructing the associated displacement and stresses expressions of each part. Numerical examples illustrate that material parameters of semi-cylindrical alluvial valleys have great impact on DSCF around subsurface cavity and DSCF dose not always decrease as wave number increases especially under incident waves with high frequency when the alluvial valleys are “softer”.

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Cao, Cai Qin, Chao Gao, and Hua Li. "A Semi-Analytical Solution of Single-Phase Elastic Foundation Three-Dimensional Static Characteristics." Advanced Materials Research 368-373 (October 2011): 2740–43. http://dx.doi.org/10.4028/www.scientific.net/amr.368-373.2740.

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Based on the single-phase elastic soil medium control equations and boundary conditions [1], by using the weighted residual method, a semi-analytical theory of elastic foundation three-dimensional static response was established. When the uniformly distributed loads were applied on the elastic half space foundation, the change rules of vertical displacement, lateral displacement, lengthways displacement were analyzed numerically, and compared with the theoretical solution [2]. The result shows that foundation displacements are completely symmetrical or antisymmetrical about x = 0 plane and y = 0 plane. The maximum vertical displacement appears in the center of load range, the maximum lateral and lengthways displacements appear at the edge of load range, and the displacements get smaller far from the loads.

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Wang, Xiang, Xiaoyu Wang, Hongyou Chai, et al. "Semi-active vibration control of large-scale flexible structure based on fuzzy adaptive SSDV technique." International Journal of Applied Electromagnetics and Mechanics 64, no. 1-4 (2020): 1199–206. http://dx.doi.org/10.3233/jae-209437.

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In order to suppress the vibration of large-scale flexible structures which are applied on the spacecraft, a semi-active control method based on fuzzy adaptive SSDV (synchronized switch damping on voltage) technique is proposed. The value of voltage source at the switching moment is adjusted adaptively by using fuzzy logic, in order to improve the stability and control precision of the semi-active control system. The feasibility of this method is verified by two kinds of experiments with typical disturbance conditions. By comparing different adaptive displacement-voltage curves, the fuzzy adaptive method can achieve higher control precision. For the initial displacement disturbance of 10 mm, the fuzzy adaptive SSDV method can increase the system damping ratio from 0.6% to 5.1%. The control effect decreases with the increase of initial displacement. For the disturbance caused by the mechanism at the tip position, the method can effectively shorten the vibration damping time and reduce the displacement from 0.3 mm to 0.04 mm.

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Li, Hong Liang, and Cun Zhang. "Green's Function Solution of the Semi-Space with Double Shallow-Buried Cavities." Key Engineering Materials 417-418 (October 2009): 145–48. http://dx.doi.org/10.4028/www.scientific.net/kem.417-418.145.

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In mechanical engineering and modern municipal construction, shallow-buried cavity structure is used widely. In this paper, Green's Function is studied, which is the solution of displacement field for elastic semi-space with double shallow-buried cavities while bearing anti-plane harmonic line source force at any point. In the complex plane, considering the symmetry of SH-wave scattering , the displacement field aroused by the anti-plane harmonic line source force and the scattering displacement field impacted by the circle cavities comprised of Fourier-Bessel series with undetermined coefficients which satisfies the stress-free condition on the ground surface are constructed. Through applying the method of multi-polar coordinate system, the equations with unknown coefficients can be obtained by using the stress-free condition of the circle cavities in the radial direction. According to orthogonality condition for trigonometric function, these equations can be reduced to a series of algebraic equations. Then the value of the unknown coefficients can be obtained by solving these algebraic equations. Green's function, that is, the total wave displacement field is the superposition of the displacement field aroused by the anti-plane harmonic line source force and the scattering displacement field. By using the expressions, an example is provided to show the effect of the change of relative location of the circle cavities and the location of the line source force. Based on this solution, the problem of interaction of double circular cavities and a linear crack in semi-space can be investigated further.

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Kaloop, Mosbeh R., Emad Elbeltagi, and Jong Wan Hu. "Estimating the Dynamic Behavior of Highway Steel Plate Girder Bridges Using Real-Time Strain Measurements." Applied Sciences 10, no. 12 (2020): 4215. http://dx.doi.org/10.3390/app10124215.

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Structural health monitoring (SHM) techniques are used to assess the behavior of structures during or after construction. The high cost of sensors is the main reason for the limited use of the SHM techniques. The present study investigates the dynamic behavior (dynamic acceleration, semi-static displacement, frequency and damping ratio) of highway steel plate girder bridges using strain measurements. The double filtration and polynomial prediction methods are used to estimate the dynamic behavior of the bridge using real-time strain measurements. To verify the accuracy of the developed method, the field monitoring measurements of the WonHyo bridge is used. The bridge behavior under different truck speeds and weights is observed and evaluated. The displacement and acceleration measurements are used to examine the results of the proposed method. The results of this study demonstrate that the strain measurements can be used to obtain an accurate semi-static displacement and dominant frequency content of the bridge. The accuracy of the developed model for the semi-static and dynamic behaviors is 99% and 69%, respectively.

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Lu, Ming Xin, Zhen Guo Li, Yin Tong Tian, et al. "The Control Technology on Continuing Displacement of Tunnel in Coal Seam with High Stress Surrounding Rocks." Advanced Materials Research 250-253 (May 2011): 1552–55. http://dx.doi.org/10.4028/www.scientific.net/amr.250-253.1552.

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The measurement data indicates that the main reason for tunnel damage is continuing level displacement with the characteristic of Pie Form. The experiment shows that, compared with uniaxial compressing, the residual stress in triaxiality compressing is greater, this can result that the level support can increase the stress of the surrounding rocks and decrease or stop the level displacement, at same time, control the pie form displacement of the coal. Based on the situation of tunnel displacement, semi-closing support with I bar or support structure with anchor cable are designed, which can control the continuing displacement of tunnel effectively.

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Li, Hong Liang, and Yong Yang. "Scattering of Anti-Plane SH-Wave by Multiple Cylindrical Inclusions in Elastic Semi-Space." Key Engineering Materials 525-526 (November 2012): 305–8. http://dx.doi.org/10.4028/www.scientific.net/kem.525-526.305.

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Multiple circular inclusions exists widely in natural media, engineering materials and modern municipal construction. The scattering field produced by multiple circular inclusions determines the dynamic stress concentration factor around the circular inclusions, and therefore determines whether the material is damaged or not. These problems are complicated, because there are many factors influenced. Researchers solved these problems by analysis and numerical methods. It is hard to obtain analytic solutions except for several simple conditions. In this paper, the solution of displacement field for elastic semi-space with multiple cylindrical inclusions by anti-plane SH-wave is constructed. In complex plane, considering the symmetry of SH-wave scattering , the displacement field aroused by the anti-plane SH-wave and the scattering displacement field impacted by the cylindrical inclusions comprised of Fourier-Bessel series with undetermined coefficients which satisfies the stress-free condition on the ground surface are constructed. Through applying the method of multi-polar coordinate system, the equations with unknown coefficients can be obtained by using the displacement and stress condition around the edge of cylindrical inclusions. According to orthogonality condition for trigonometric function, these equations can be reduced to a series of algebraic equations. Then the value of the unknown coefficients can be obtained by solving these algebraic equations. The total wave displacement field is the superposition of the displacement field aroused by the anti-plane SH-wave and the scattering displacement field. By using the expressions, an example is provided to show the effect of the change of relative location of the cylindrical inclusions. Based on this solution, the problem of interaction of multiple cylindrical inclusions and a linear crack in semi-space can be investigated further.

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Gao, Ji, Qiang Zhao, and Tian Xia. "Semi-Closed Loop Control of NC Machine Tools Based on the Displacement Error." Applied Mechanics and Materials 37-38 (November 2010): 1138–41. http://dx.doi.org/10.4028/www.scientific.net/amm.37-38.1138.

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The displacement tolerance of Semi-closed loop control NC machine tool is an important index influencing processing procession. Based on this point, theory analysis and experiment is developed in this study. Both the source of displacement tolerance and influence factor are listed. The tolerance model is proposed for evaluation of the theory. The calculation results indicated that the tolerance model are accurate.

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Oppikofer, Thierry, Reginald L. Hermanns, Nicholas J. Roberts, and Martina Böhme. "SPLASH: semi-empirical prediction of landslide-generated displacement wave run-up heights." Geological Society, London, Special Publications 477, no. 1 (2018): 353–66. http://dx.doi.org/10.1144/sp477.1.

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AbstractDisplacement waves (or tsunamis) generated by sub-aerial landslides cause damage along shorelines over long distances, making run-up assessment a crucial component of landslide risk analysis. Although site-specific modelling provides important insight into the behaviour of potential waves, more general approaches using limited input parameters are necessary for preliminary assessments. We use a catalogue of landslide-generated displacement waves to develop semi-empirical relationships linking displacement wave run-up (R in metres) to distance from landslide impact (x in kilometres) and to landslide volume (V in millions of cubic metres). For individual events, run-up decreases with distance according to power laws. Consideration of ten events demonstrates that run-up increases with landslide volume, also according to a power law. Combining these relationships gives the SPLASH equation: R = aVbxc, with best-fitted parameters a = 18.093, b = 0.57110 and c = −0.74189. The 95% prediction interval between the calculated and measured run-up values is 2.58, meaning that 5% of the measured run-up heights exceed the predicted value by a factor of 2.58 or more. This relatively large error is explained by local amplifications of wave height and run-up. Comparisons with other displacement wave models show that the SPLASH equation is a valuable tool for the first-stage preliminary hazard and risk assessment for unstable rock slopes above water bodies.

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Wang, H. N., G. S. Zeng, and M. J. Jiang. "Analytical stress and displacement around non-circular tunnels in semi-infinite ground." Applied Mathematical Modelling 63 (November 2018): 303–28. http://dx.doi.org/10.1016/j.apm.2018.06.043.

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Saab, Joseph Y., and Marcos de Mattos Pimenta. "Displacement thickness evaluation for semi-empirical airfoil trailing-edge noise prediction model." Journal of the Brazilian Society of Mechanical Sciences and Engineering 38, no. 2 (2015): 385–94. http://dx.doi.org/10.1007/s40430-015-0341-5.

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Zhang, Rui, and Hong Liang Li. "Scattering of Anti-Plane SH-Wave by Multiple Cylindrical Cavities in Elastic Semi-Space." Advanced Materials Research 317-319 (August 2011): 2497–500. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.2497.

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In natural medium, engineering materials and structures, it can be found that there are cavities everywhere. When structure is impacted by dynamic load, the scattering field will be produced because of the cavities, and it could cause dynamic stress concentration at the edge of the cavities. In this paper, the solution of displacement field for elastic semi-space with multiple cylindrical cavities by anti-plane SH-wave is constructed. In complex plane, considering the symmetry of SH-wave scattering, the displacement field aroused by the anti-plane SH-wave and the scattering displacement field impacted by the cylindrical cavities comprised of Fourier-Bessel series with undetermined coefficients which satisfies the stress-free condition on the ground surface are constructed. Through applying the method of multi-polar coordinate system, the equations with unknown coefficients can be obtained by using the stress free condition of the cylindrical cavities in the radial direction. According to orthogonality condition for trigonometric function, these equations can be reduced to a series of algebraic equations. Then the value of the unknown coefficients can be obtained by solving these algebraic equations. The total wave displacement field is the superposition of the displacement field aroused by the anti-plane SH-wave and the scattering displacement field. By using the expressions, an example is provided to show the effect of the change of relative location of the cylindrical cavities. Based on this solution, the problem of interaction of multiple cylindrical cavities and a linear crack in semi-space can be investigated further.

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Yang, Zhen, and Shi Qun Guo. "Fundamental Solutions of a Normal Force in Semi-Infinite Coating Materials Part II: Solution of Force Acting in the Interior of Substrate and at Interface." Advanced Materials Research 243-249 (May 2011): 5935–40. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.5935.

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In this work, the spatial theoretical solutions of concentrated normal forces acting in the substrate and at the interface of semi-infinite coating materials have been deduced based on the image point method. The explicit solution is given in the series of the displacement functions corresponding to each image point. It is found that all displacement functions can be deduced by the order of the image point. Numerical analysis has been carried out to verify the theoretical deductions. It is found that the accurate enough theoretical solution can be obtained by only taking the displacement functions corresponding to the first several image points into account. The fundamental solutions for a concentrated force acting at interface of two bonded semi-infinite bodies is also deduced, which is necessary in the analysis of coating materials by using these theoretical solution as the fundamental solution.

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Su, Li Ya. "Mechanics Analysis of Semi-Rigid Subgrade Pavement Structure." Applied Mechanics and Materials 580-583 (July 2014): 105–8. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.105.

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The semi-rigid base asphalt pavement structure was choose often used to the highway in our country, but the semi-rigid base asphalt pavement early damage almost has become a common phenomenon.In this paper, the rule and trend of mechanics response about pavement structure (the vertical displacement and tensile stress) were analyzed under the semi-rigid base choose different elasticity modulus and thickness by ANSYS for muti-layer foundation of semi-rigid base pavement design to provide reference.

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Wang, Rui Cai, Jian Yong Shi, and Ning Zhu. "Research on Soil Deformation due to Pile Jacking in Saturated Soil." Applied Mechanics and Materials 256-259 (December 2012): 445–49. http://dx.doi.org/10.4028/www.scientific.net/amm.256-259.445.

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According to the theoretical formula of compacting displacement field due to jacked pile in semi-infinite soil, calculation of displacement field produced during construction process of precast pile was carried out. And the changing trends of radial displacement with depth of pile penetrating, the maximum radial displacement with normalized distance r/D and vertical surface displacement with normalized distance r/D were analyzed in this paper. Then the Comparison between theory calculation results and the field test data was presented. The results show that the theoretical formula will fit with the actual situation of the site, when the soft soil properties around the pile are homogeneous and saturated. The further solving of compacting displacement field due to pile jacking was put forward.

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He, Yan, and Zheng Jian Li. "Geometrically Non-Linear Analysis of Composite Shell Structure Deformation." Advanced Materials Research 460 (February 2012): 381–84. http://dx.doi.org/10.4028/www.scientific.net/amr.460.381.

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At present, the shell structure is broadly used in the engineering field, and the finite element method is the main method to analysis of the structural design. Because many variables are used in the finite element method and the computation is complex, this paper used Bezier surface patches as the admissible displacement fields to represent the shell’s middle surface displacement and rotation components, the deformations of the composite shell under the loads are studied with a Semi-analytical procedure. The results show that semi-analytical and analytical procedure are in good agreement with the results of the analysis, it can be applied in the project.

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Singh, Anuwedita, S. Das, and E.-M. Craciun. "Study of Semi-Infinite Crack in a Sandwiched Orthotropic Strip." Journal of Mechanics 36, no. 2 (2020): 149–58. http://dx.doi.org/10.1017/jmech.2019.54.

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ABSTRACTThe problem of semi-infinite crack situated in an orthotropic strip sandwiched between two identical half planes has been considered. The considered boundary value problem has been solved to convert it into the standard Wiener-Hopf equation by using Fourier transform technique, which has been solved to obtain analytical expressions for stress intensity factor and crack opening displacement. The variations of stress intensity factors and crack opening displacement are displayed graphically for different pair of orthortropic materials and for various depth of the strip of the composite media.

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Kamal, I. Z. Mustaffa, A. Imran Ismail, M. Naim Abdullah, and Y. Adnan Ahmed. "Influence of the transom immersion to ship resistance components at low and medium speeds." Journal of Naval Architecture and Marine Engineering 17, no. 2 (2020): 165–82. http://dx.doi.org/10.3329/jname.v17i2.48494.

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The transom stern offered some advantages over the traditional rounded cruiser stern reducing the resistance of a ship. This can only be achieved if the transom stern is carefully designed with suitable transom immersion ratio. In this study, the influence of different transom area immersion ratios on the resistance components was investigated for a semi-displacement hull and a full displacement hull. The base hull was based on NPL hull form and KCS hull form for a semi-displacement and full-displacement hull respectively. The transom immersion ratios for the NPL hull were varied at a ratio of 0.5, 0.7, 0.8 and 1.0. The resistance of each of the NPL hull form was simulated at Froude number 0.3 up to 0.6. The transom immersion ratios for the KCS hull were varied at a ratio of 0.05, 0.1, 0.15 and 0.3. The resistance of each of the KCS hull form was simulated at Froude number 0.195, 0.23, 0.26 and 0.28. The transoms of both hulls were modified or varied systematically to study the influence of the transom shape or immersion on the total and wave resistance components. The investigation was carried out using a CFD software named SHIPFLOW 6.3 based on RANSE solver. These results on the NPL hull shows that the larger the transom immersion, the higher the resistance will be for a semi-displacement vessel. The increased resistance is contributed by additional frictional and wave resistance components. The results for the KCS hull seems to contradict with the results obtained from the NPL hull. The larger and deeper transom for the case of KCS hull form sometimes can be beneficial at higher Froude number.

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Fan, Wei, Huaxue Jin, Yuchen Fu, and Yuyang Lin. "A type of symmetrical differential lever displacement amplification mechanism." Mechanics & Industry 22 (2021): 5. http://dx.doi.org/10.1051/meca/2021003.

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The paper proposes a type of symmetrical flexure hinge displacement amplification mechanism, which is based on the differential lever to effectively improve the displacement output stroke of the PZT and reduce the additional displacement. In addition to describes the working principle of the differential displacement amplification, it establishes the semi-model of the micro-displacement amplification mechanism according to the symmetrical structure. The stiffness, displacement loss, and natural frequency of the amplification mechanism are simulated by finite element analysis (FEA). Simultaneously, build the mathematical model of amplification ratio to obtain the optimal driving frequency when the natural frequency is 930.58 Hz. The maximum output displacement of the designed mechanism is 313.05 µm and the amplification ratio is 6.50. Due to the symmetrical structure, the output additional displacement of the whole amplification mechanism is small.It provides a scientific basis for further improving the positioning accuracy of the micro/nano drive control system.

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Hai, Nguyen Van, Le Van Binh, Doan Ngoc Tinh Nghiem, and Ngo Huu Cuong. "Large displacement elastic static analysis of semi-rigid planar steel frames by corotational Euler--Bernoulli finite element." Journal of Science and Technology in Civil Engineering (STCE) - NUCE 13, no. 2 (2019): 24–32. http://dx.doi.org/10.31814/stce.nuce2019-13(2)-03.

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A corotational finite element for large-displacement elastic analysis of semi-rigid planar steel frames is proposed in this paper. Two zero-length rotational springs are attached to the ends of the Euler-Bernoulli element formulated in corotational context to simulate the flexibility of the beam-to-column connections and then the equilibrium equations of the hybrid element, including the stiffness matrix which contains the stiffness terms of the rotational springs, are established based on the static condensation procedure. The linear and Kishi-Chen three-parameter power models are applied in modelling the moment-rotation relation of beam-column connections. The arc-length nonlinear algorithm combined with the sign of displacement internal product are used to predict the equilibrium paths of the system under static load. The analysis results are compared to previous studies to verify the accuracy and effectiveness of the proposed element and the applied nonlinear procedure. Keywords: corotational context; Euler-Bernoulli element; large displacement; semi-rigid connection; steel frame; static analysis.

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Qi, Hui, Jing Guo, and Jie Yang. "The Ground Motion of Isosceles Triangular Hill in Right-Angle Plane Impacted by SH-Wave." Applied Mechanics and Materials 121-126 (October 2011): 2363–66. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.2363.

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The analytical solution to the problem of the scattering of SH-wave by isosceles triangular hill in right-angle plane is given by using the methods of complex function and multiple coordinate. Firstly, the solution region is divided into two domains, where domain I involves isosceles triangular hill and a semi-circular bottom, domain II involves a semi-circular hollow in right-angle plane. And a standing wave function is constructed which satisfies the zero-stress conditions at the triangular wedges. In domain II, the scattering wave functions which satisfy the stress free boundary conditions at the free surfaces for the right-angle plane are constructed. Secondly, based on the conditions of the displacement continuity and stress continuity at the “common border” in the domains, a series of infinite algebraic equations are given and solved by truncation. Finally, some examples for amplitude of displacement on the surface are given. Numerical results show that amplitude of displacement on the surface is influenced by isosceles triangular hill.

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