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Journal articles on the topic 'Nonlinear impact loads'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Masoum, M. A. S., E. F. Fuchs, and D. J. Roesler. "Impact of nonlinear loads on anisotropic transformers." IEEE Transactions on Power Delivery 6, no. 4 (1991): 1781–88. http://dx.doi.org/10.1109/61.97721.

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2

Schellin, Thomas E., and Ould el Moctar. "Numerical Prediction of Impact-Related Wave Loads on Ships." Journal of Offshore Mechanics and Arctic Engineering 129, no. 1 (November 8, 2006): 39–47. http://dx.doi.org/10.1115/1.2429695.

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We present a numerical procedure to predict impact-related wave-induced (slamming) loads on ships. The procedure was applied to predict slamming loads on two ships that feature a flared bow with a pronounced bulb, hull shapes typical of modern offshore supply vessels. The procedure used a chain of seakeeping codes. First, a linear Green function panel code computed ship responses in unit amplitude regular waves. Ship speed, wave frequency, and wave heading were systematically varied to cover all possible combinations likely to cause slamming. Regular design waves were selected on the basis of

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3

Ghorbani, M. Jawad, and Hossein Mokhtari. "Impact of Harmonics on Power Quality and Losses in Power Distribution Systems." International Journal of Electrical and Computer Engineering (IJECE) 5, no. 1 (February 1, 2015): 166. http://dx.doi.org/10.11591/ijece.v5i1.pp166-174.

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This paper investigates the harmonic distortion and losses in power distribution systems due to the dramatic increase of nonlinear loads. This paper tries to determine the amount of the harmonics generated by nonlinear loads in residential, commercial and office loads in distribution feeders and estimates the energy losses due to these harmonics. Norton equivalent modeling technique has been used to model the nonlinear loads. The presented harmonic Norton equivalent models of the end user appliances are accurately obtained based on the experimental data taken from the laboratory measurements.

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4

Arsava, K. Sarp, and Yeesock Kim. "Modeling of Magnetorheological Dampers under Various Impact Loads." Shock and Vibration 2015 (2015): 1–20. http://dx.doi.org/10.1155/2015/905186.

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Magnetorheological (MR) damper has received great attention from structural control engineering because it provides the best features of both passive and active control systems. However, many studies on the application of MR dampers to large civil structures have tended to center on the modeling of MR dampers under seismic excitations, while, to date, there has been minimal research regarding the MR damper model under impact loads. Hence, this paper investigates nonlinear models of MR dampers under a variety of impact loads and control signals. Two fuzzy models are proposed for modeling the no

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5

Lin, Jie, Chao Deng, and Jia Chu Xu. "Nonlinear Dynamic Buckling of FGM Shallow Conical Shells under Triangular Pulse Impact Loads." Advanced Materials Research 460 (February 2012): 119–26. http://dx.doi.org/10.4028/www.scientific.net/amr.460.119.

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In this paper, nonlinear dynamic buckling of FGM shallow conical shells under the action of triangular pulse impact loads are investigated. The nonlinear dynamic governing equation of symmetrically FGM shallow conical shells is built. Using Galerkin method, the nonlinear dynamic governing equation is solved, and the nonlinear dynamic response equation of symmetrically FGM shallow conical shells is obtained. The Runge-Kutta method is introduced to numerically solve the nonlinear dynamic response equation and the impact response curve is achieved. Budiansky-Roth motion criterion expressed by the

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6

Du, Chang Long, Yu Liu, and Jian Ping Li. "Numerical Analysis on Impact Load of Elasto-Plastic Spherical Impact." Advanced Materials Research 189-193 (February 2011): 1840–43. http://dx.doi.org/10.4028/www.scientific.net/amr.189-193.1840.

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The spherical impact is a common phenomenon in mechanical engineering. The elasto-plastic impact is more complicate than the elastic impact. The elasto-plastic impact loads are investigated for the different contact stiffness and the different impact velocity by the nonlinear finite element method. The accuracy and reliability of the finite elements model are verified by comparing the numerical results of the elastic impact with the Hertz results. The elasto-plastic impact simulation shows that the impact loads have a negative exponential relation with the contact stiffness as well as a linear

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7

Manito, Allan, Ubiratan Bezerra, Maria Tostes, Edson Matos, Carminda Carvalho, and Thiago Soares. "Evaluating Harmonic Distortions on Grid Voltages Due to Multiple Nonlinear Loads Using Artificial Neural Networks." Energies 11, no. 12 (November 26, 2018): 3303. http://dx.doi.org/10.3390/en11123303.

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This paper presents a procedure to estimate the impacts on voltage harmonic distortion at a point of interest due to multiple nonlinear loads in the electrical network. Despite artificial neural networks (ANN) being a widely used technique for the solution of a large amount and variety of issues in electric power systems, including harmonics modeling, its utilization to establish relationships among the harmonic voltage at a point of interest in the electric grid and the corresponding harmonic currents generated by nonlinear loads was not found in the literature, thus this innovative procedure

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8

Sarp Arsava, Kemal, Yeesock Kim, Tahar El-Korchi, and Hyo Seon Park. "Nonlinear system identification of smart structures under high impact loads." Smart Materials and Structures 22, no. 5 (April 3, 2013): 055008. http://dx.doi.org/10.1088/0964-1726/22/5/055008.

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9

Finn, Patrick J., Robert F. Beck, Armin W. Troesch, and Yung Sup Shin. "Nonlinear Impact Loading in an Oblique Seaway." Journal of Offshore Mechanics and Arctic Engineering 125, no. 3 (July 11, 2003): 190–97. http://dx.doi.org/10.1115/1.1578499.

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There is an increasing interest in developing direct calculation methods and procedures for determining extreme wave loads on ship girders (e.g. ISSC, 2000 [1]). Ships experiencing bottom and bow flare slamming have heightened the need for computational tools suitable to accurately predict motion and structural responses. The associated nonlinear impact problem is complicated by the complex free surface and body boundary conditions. This paper examines a “blended” linear–nonlinear method by which extreme loads due to bottom impact and flare slamming can be determined. Using a high-speed contai

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10

Piatkowski, Tomasz, Janusz Sempruch, and Tomasz Tomaszewski. "DYNAMICS OF A SORTING PROCESS WITH A STREAM OF DISCRETE IMPACT LOADS." Transactions of the Canadian Society for Mechanical Engineering 38, no. 1 (March 2014): 139–54. http://dx.doi.org/10.1139/tcsme-2014-0009.

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The sorting process applied to a stream of unit loads (cubiform objects, parcels) transported on conveyors is investigated. The sorting process is performed by means of an active fence (flexible arm) that makes a 1dof rotary motion. The manipulated loads are treated as bodies with nonlinear elastic-damping properties described by modified nonlinear Kelvin model. The equations of motion of the flexible fence, and those of the interacting object, are derived using the finite element method. The assessment of influence of constructional and operating parameters of the fence on the course of the s

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11

Tedesco, J. W., P. B. McGill, and W. G. McDougal. "Response of Dolos Concrete Armor Units to Impact Loads." Journal of Offshore Mechanics and Arctic Engineering 113, no. 4 (November 1, 1991): 286–91. http://dx.doi.org/10.1115/1.2919932.

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A finite element analysis is conducted to determine the critical impact velocities for concrete dolos. The model formulation includes deformations at the contact surface and nonlinear material properties. Two dolos orientations are considered: vertical fluke seaward and horizontal fluke seaward. In both cases, the larger units fail at lower angular impact velocities. It is also shown that doubling the concrete strength increases the impact resistance by approximately 40 percent.

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12

Sarp Arsava, K., Yunyoung Nam, and Yeesock Kim. "Nonlinear system identification of smart reinforced concrete structures under impact loads." Journal of Vibration and Control 22, no. 16 (August 8, 2016): 3576–600. http://dx.doi.org/10.1177/1077546314563966.

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13

P. Monteiro, Flávia, Suzane A. Monteiro, Maria E. Tostes, and Ubiratan H. Bezerra. "Using True RMS Current Measurements to Estimate Harmonic Impacts of Multiple Nonlinear Loads in Electric Distribution Grids." Energies 12, no. 21 (October 30, 2019): 4132. http://dx.doi.org/10.3390/en12214132.

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Currently, for analyzing harmonic impacts on voltage at a point of interest, due to multiple nonlinear loads, the literature recommends carrying out simultaneous and synchronized measurement campaigns in all suspicious points with the use of high cost energy quality analyzers that are usually not available at the customers’ facilities and very often also not at the electric utilities. To overcome this drawback this paper proposes a method of assessing the harmonic impact due to multiple nonlinear loads on the total voltage harmonic distortion using only the load current true RMS values which a

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14

Long, Xiaohong, Ahmed Turgun, Rong Yue, Yongtao Ma, and Hui Luo. "Influence Factors Analysis of RC Beams under Falling Weight Impact Based on HJC Model." Shock and Vibration 2018 (October 21, 2018): 1–16. http://dx.doi.org/10.1155/2018/4731863.

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Impact loads may cause serious or even fatal damage to the structure (component), in most existing specifications in China, and there are no special terms that take impact load into consideration. So, the response analysis of the structure (component) under impact loads is very important. In this paper, the sensitivity analysis was conducted for the 22 parameters of the Holmquist–Johnson concrete (HJC) constitutive model of concrete, and the sensitive parameters of the HJC model are identified with A, B, G, Pl, μl, and fc respectively. LS-DYNA nonlinear transient finite element analysis code w

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15

Zhang, Suo Huai, and Hai Ming Wang. "Research on Impacting Loads between Metro Vehicles." Applied Mechanics and Materials 628 (September 2014): 199–204. http://dx.doi.org/10.4028/www.scientific.net/amm.628.199.

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In order to research impacting characteristics of the trainset, the impacting model and governing equations are established, in which, the stiffness and nonlinear damping of a buffer, friction force between rail and the vehicles wheels is considered. The stiffness and nonlinear damping of the buffers used in the model is verified by testing results. By numerical simulation, it is found that when moving trainset impacts standing trainset, because the impacting force, stroke of the buffers located in impacting interface is the maximum, the buffers capacity must be large enough to avoid rigid imp

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16

MIMURA, K., T. UMEDA, M. YU, Y. UCHIDA, and H. YAKA. "EFFECTS OF IMPACT VELOCITY AND SLENDERNESS RATIO ON DYNAMIC BUCKLING LOAD FOR LONG COLUMNS." International Journal of Modern Physics B 22, no. 31n32 (December 30, 2008): 5596–602. http://dx.doi.org/10.1142/s0217979208050875.

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In this research, the buckling behavior of long columns under dynamic load was investigated both experimentally and numerically, and an effective buckling criterion for dynamic load was derived from the results in terms of the impact velocity and the slenderness ratio. In the experiments, a free fall drop-weight type impact testing machine was employed. The dynamic buckling loads were measured by the load sensing block, and the displacements were measured by a high speed magnetic-resistance device. In the numerical analyses, dynamic FEM code 'MSC-Dytran' was used to simulate the typical experi

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17

Heskes, Peter J. M., Johanna M. A. Myrzik, and Wil L. Kling. "Impact of distribution system's nonlinear loads with constant power on grid voltage." European Transactions on Electrical Power 21, no. 1 (July 12, 2010): 698–711. http://dx.doi.org/10.1002/etep.470.

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18

Zhang, Junhua, Xiufang Zhu, Xiaodong Yang, and Wei Zhang. "Transient nonlinear responses of an auxetic honeycomb sandwich plate under impact loads." International Journal of Impact Engineering 134 (December 2019): 103383. http://dx.doi.org/10.1016/j.ijimpeng.2019.103383.

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19

Xiao, Sen, Yanchao Qie, Wu Chen, Jikuang Yang, and Jeff R. Crandall. "Investigation of chest biomechanical response by variation of restraint loads in frontal impact." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, no. 5 (October 14, 2019): 1377–88. http://dx.doi.org/10.1177/0954407019881067.

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The seatbelt restraint load is one of the primary sources of occupant chest injury. Thus, studying the different biomechanical responses of chest by varying the seatbelt loads will result in a significant improvement in seatbelt protection performance. Based on the high-biofidelity mechanical dummy model, a sled-dummy test was conducted to investigate the differences in chest injury outcomes caused by the variation of seatbelt load paths or load processes. The chest kinematics and kinetics are compared to determine the influence of load factors on these biomechanical outcomes. Results show tha

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20

Han, Bing, Hao Feng, Yuan Yuan Liu, and Feng Han. "Harmonic Impact on the Energy Meter." Advanced Materials Research 645 (January 2013): 263–66. http://dx.doi.org/10.4028/www.scientific.net/amr.645.263.

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A large number of harmonics generated by nonlinear loads injected into the grid will make the power system voltage and current waveforms produce a serious distortion, in turn impact on the measuring instrument. Harmonic generation because and it’s impact on induction watt-hour meter are introduced in this paper, the measurement error on the induction meter is analized, and methods and countermeasures to reduce the induction meter power measurement error are proposed.

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21

Ma, Niu-Jing, Li-Xiong Gu, and Long Piao. "Nonlinear Dynamic Response of Elastically Supported Stiffened Plates with Initial Stresses and Geometric Imperfections Under Impact Loads." International Journal of Structural Stability and Dynamics 20, no. 04 (April 2020): 2050053. http://dx.doi.org/10.1142/s0219455420500534.

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This paper deals with the nonlinear dynamic response of elastically supported stiffened plates with initial stresses under impact loads. A stiffened plate is assumed to be composed of a plate with some stiffeners, which are treated separately. The plate is modeled by the thin plate theory, whereas the stiffeners are considered as geometrically nonlinear Euler–Bernoulli beams. First, the equations of both the kinetic energies and strain energies of the plate and stiffeners are established. Then, the dynamic equilibrium equations for the stiffened plate are derived as the Lagrange’s equation of

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22

Iqbal, Muhammad Naveed, Lauri Kütt, Kamran Daniel, Bilal Asad, and Payam Shams Ghahfarokhi. "Estimation of Harmonic Emission of Electric Vehicles and Their Impact on Low Voltage Residential Network." Sustainability 13, no. 15 (July 31, 2021): 8551. http://dx.doi.org/10.3390/su13158551.

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The EV penetration in the low voltage residential grids is expected to increase rapidly in the coming years. It is expected that EV consumers will prefer overnight home charging because of its convenience and lack of charging infrastructure. The EV battery chargers are nonlinear loads and likely to increase the current harmonic emission in the distribution network. The imminent increase of EV load requires upgrading or managing the existing power system to support the additional charging load. This paper provides the estimation of the current harmonic emission of the EV charging load at differ

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23

Rozegnał, Bartosz, Paweł Albrechtowicz, Dominik Mamcarz, Monika Rerak, and Maciej Skaza. "The Power Losses in Cable Lines Supplying Nonlinear Loads." Energies 14, no. 5 (March 3, 2021): 1374. http://dx.doi.org/10.3390/en14051374.

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This paper presents the skin effect impact on the active power losses in the sheathless single-core cables/wires supplying nonlinear loads. There are significant conductor losses when the current has a distorted waveform (e.g., the current supplying diode rectifiers). The authors present a new method for active power loss calculation. The obtained results have been compared to the IEC-60287-1-1:2006 + A1:2014 standard method and the method based on the Bessel function. For all methods, the active power loss results were convergent for small-cable cross-section areas. The proposed method gives

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24

Michalec, Łukasz, Michał Jasiński, Tomasz Sikorski, Zbigniew Leonowicz, Łukasz Jasiński, and Vishnu Suresh. "Impact of Harmonic Currents of Nonlinear Loads on Power Quality of a Low Voltage Network–Review and Case Study." Energies 14, no. 12 (June 19, 2021): 3665. http://dx.doi.org/10.3390/en14123665.

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The paper presents a power-quality analysis in the utility low-voltage network focusing on harmonic currents’ pollution. Usually, to forecast the modern electrical and electronic devices’ contribution to increasing the current total harmonic distortion factor (THDI) and exceeding the regulation limit, analyses based on tests and models of individual devices are conducted. In this article, a composite approach was applied. The performance of harmonic currents produced by sets of devices commonly used in commercial and residential facilities’ nonlinear loads was investigated. The measurements we

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25

Cointe, R. "Two-Dimensional Water-Solid Impact." Journal of Offshore Mechanics and Arctic Engineering 111, no. 2 (May 1, 1989): 109–14. http://dx.doi.org/10.1115/1.3257083.

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The general problem of a two-dimensional water-solid impact is considered. The method of matched asymptotic expansions is used to solve the resulting boundary value problem for small penetration depth. The first-order solution obtained extends the classical Von Ka´rma´n and Wagner theories to non-normal impact and initially curved free surfaces. It accounts for nonlinear features such as the creation of a jet at each waterline. The application of the method to the computation of the impact loads exerted by spilling breakers on a marine structure is discussed.

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26

Liu, K., and J. Zhao. "Progressive Damage Behaviours of Triaxially Confined Rocks under Multiple Dynamic Loads." Rock Mechanics and Rock Engineering 54, no. 6 (May 5, 2021): 3327–58. http://dx.doi.org/10.1007/s00603-021-02408-z.

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AbstractInvestigation of rock progressive damage under static confinement and strain rates facilitates the generation mechanism of natural fault damage zones. A triaxial Hopkinson bar apparatus is used to perform dynamic triaxial compression tests to examine the damage and degradation process of rocks subjected to multiple impacts. Dynamic mechanical properties are determined under a static triaxial pre-stress of (30, 20, 10) MPa and multiple dynamic loadings, with the repetitive impact velocity of 27 m/s and strain rates from 50 to 150/s. The acoustic characteristics are identified by ultraso

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27

Dong, Jun, Jian Guo Xu, Hao Zhang, Yu Jie Pei, and Xian Feng Li. "Research and Application of SVC Technology in Grid." Applied Mechanics and Materials 543-547 (March 2014): 878–83. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.878.

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The cause serious deterioration in power quality problems for the growing impact and nonlinear load capacity, introduced SVC device in the role of modern power systems and applications. According to the lack of adequate regional dynamic reactive power regulation means to cause voltage fluctuations, harmonics exceeded the actual situation, through analysis and simulation of the existing 66kV grid power quality conditions, refers to the necessity of application of SVC, the compensation capacity for SVC, filter capacitor system parameters and control strategies were designed, the results show imp

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28

Dong, Yongle, Fan Zhang, Xuan Li, Lifang Zhang, Jia Yu, Yongmei Mao, and Guanglong Jiang. "Nonlinear Load Harmonic Prediction Method Based on Power Distribution Internet of Things." Scientific Programming 2021 (May 24, 2021): 1–12. http://dx.doi.org/10.1155/2021/9978900.

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A large number of nonlinear loads have an impact on the stable operation of the power system. To solve this problem, this article proposes a nonlinear load harmonic prediction method based on the architecture of Power Distribution Internet of Things. Firstly, this method integrates the characteristics of edge computing technology and Power Distribution Internet of Things technology and proposes a Power Distribution Internet of Things framework applied to nonlinear load harmonic prediction, which provides top-level design for subsequent harmonic prediction methods of Power Distribution Internet

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29

Bocian, Mirosław, Krzysztof Jamroziak, and Maciej Kulisiewicz. "An identification of nonlinear dissipative properties of constructional materials at dynamical impact loads conditions." Meccanica 49, no. 8 (April 8, 2014): 1955–65. http://dx.doi.org/10.1007/s11012-014-9931-z.

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30

Gholipour, Gholamreza, Chunwei Zhang, and Asma Alsadat Mousavi. "Nonlinear failure analysis of bridge pier subjected to vessel impact combined with blast loads." Ocean Engineering 234 (August 2021): 109209. http://dx.doi.org/10.1016/j.oceaneng.2021.109209.

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31

Xi, Cao, and Yun Hong Hao. "The Doubly Nonlinear Limit Load Analysis of Space Grid Structure." Applied Mechanics and Materials 166-169 (May 2012): 144–49. http://dx.doi.org/10.4028/www.scientific.net/amm.166-169.144.

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This paper first adopts variational inequation—the method of linear complementary equation. We use this method to analyses the elastoplastic limit load of space grid structure. This is a way to resolve the nonlinear question. Adopting this method to resolve the limit load of space grid structure avoid some drawback caused by adopting iteration method. We only need do some limited compute to a load-increment then we can obtain consequence, which fit in with all condition. Particularly, though adopting the method of linear complementary equation, we can control the value of limit load, make the

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32

Yao, Xing Jia, Jiang Sheng Zhu, Kui Chao Ma, and Qing Ding Guo. "The Research of Model-Free Adaptive Control for Large Scale Wind Turbine." Applied Mechanics and Materials 433-435 (October 2013): 1293–97. http://dx.doi.org/10.4028/www.scientific.net/amm.433-435.1293.

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Dynamic load is a key consideration in large scale wind turbine design. It is approved that the performance of controller can distinguish impact wind turbine loads. For strong external disturbances and inaccurately modeled of large wind turbines, In this paper, we propose model-free adaptive (Model Free Adapt, MFA) individual pitch control algorithms. The controller was developed in to mitigate the rotor unbalance structural load for variable speed wind turbine. The controller is designed from a nonlinear model of the system which takes into account the blades, shaft and tower flexibilities. B

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33

Li, Jia-Xiang, Hong-Nan Li, and Xing Fu. "Stability and Dynamic Analyses of Transmission Tower-Line Systems Subjected to Conductor Breaking." International Journal of Structural Stability and Dynamics 17, no. 06 (August 2017): 1771013. http://dx.doi.org/10.1142/s0219455417710134.

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Ice loads exerted on the transmission line can increase the probability of conductor breaking, which will lead to the stability failure of transmission towers. In this paper, a transmission tower-line system is established for two towers and three span lines. Then the nonlinear static stability analysis and nonlinear dynamic stability analysis induced by the conductor breaking are carried out to obtain the load versus displacement curves, while studying the failure modes of the transmission tower-line system. Moreover, the ice load and initial eccentricity are considered in the numerical simul

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34

Hao, Ceng Ceng, Yue Jin Tang, and Jing Shi. "Study on the Harmonic Impact of Large Scale Electric Vehicles to Grid." Applied Mechanics and Materials 443 (October 2013): 273–78. http://dx.doi.org/10.4028/www.scientific.net/amm.443.273.

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Large scale electric vehicles integration into power grid, as nonlinear loads, will pose inevitable impacts on the operation of power system, one of which the harmonic problem will affect the power quality greatly. Firstly, the article analyzes the characteristics of harmonic caused by electric vehicle charging. And then, the harmonic flow distribution is analyzed based on the IEEE standard node systems. During transient analyses, the electric vehicle charging stations connected to electric grid are represented as harmonic sources. Results show that structure and voltage grade of electric grid

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35

Cheng, Qiangqiang, Yiqi Yan, Shichao Liu, Chunsheng Yang, Hicham Chaoui, and Mohamad Alzayed. "Particle Filter-Based Electricity Load Prediction for Grid-Connected Microgrid Day-Ahead Scheduling." Energies 13, no. 24 (December 8, 2020): 6489. http://dx.doi.org/10.3390/en13246489.

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This paper proposes a particle filter (PF)-based electricity load prediction method to improve the accuracy of the microgrid day-ahead scheduling. While most of the existing prediction methods assume electricity loads follow normal distributions, we consider it is a nonlinear and non-Gaussian process which is closer to the reality. To handle the nonlinear and non-Gaussian characteristics of electricity load profile, the PF-based method is implemented to improve the prediction accuracy. These load predictions are used to provide the microgrid day-ahead scheduling. The impact of load prediction

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36

Ganji, H. Doumiri, S. S. Ganji, D. D. Ganji, and F. Vaseghi. "Analysis of Nonlinear Structural Dynamics and Resonance in Trees." Shock and Vibration 19, no. 4 (2012): 609–17. http://dx.doi.org/10.1155/2012/702712.

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Wind and gravity both impact trees in storms, but wind loads greatly exceed gravity loads in most situations. Complex behavior of trees in windstorms is gradually turning into a controversial concern among ecological engineers. To better understand the effects of nonlinear behavior of trees, the dynamic forces on tree structures during periods of high winds have been examined as a mass-spring system. In fact, the simulated dynamic forces created by strong winds are studied in order to determine the responses of the trees to such dynamic loads. Many of such nonlinear differential equations are

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37

Hernández, Jairo, Andrés A. Romero, Jan Meyer, and Ana María Blanco. "Impact of Nonlinear Lighting Loads on the Neutral Conductor Current of Low Voltage Residential Grids." Energies 13, no. 18 (September 16, 2020): 4851. http://dx.doi.org/10.3390/en13184851.

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In the last decade, mainly due to political incentives towards energy efficiency, the share of lamps with power electronic interfaces, like Compact Fluorescent Lamps (CFL) and Light Emitting Diode (LED) lamps, has significantly increased in the residential sector. Their massive use might have a substantial impact on harmonic currents and, consequently, on the current flowing in the neutral conductor. This paper analyzes the impact of modern energy-efficient lighting technologies on the neutral conductor current by using a synthetic Low Voltage residential grid. Different load scenarios reflect

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38

Pakhmurin, Oleg, Victor Mikhaylov, and Matvey Khamgushkeev. "Impact of genetically nonlinear application of external loads on the stress-strain state and on the principal vibration modes of reinforced concrete frame buildings on elastic subsoil." EPJ Web of Conferences 221 (2019): 01038. http://dx.doi.org/10.1051/epjconf/201922101038.

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In this paper authors discuss the impact of genetically nonlinear application of external loads on the stress-stain state and on principal vibration modes of reinforced concrete frame structures on elastic foundation. The reader will find a methodology for integrated numerical and instrumental analysis. Six examples of linear and nonlinear FEA-models calculated in SCAD Office are given in comparison.

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39

Zhu, Shengyang, Jun Luo, Mingze Wang, and Chengbiao Cai. "Mechanical characteristic variation of ballastless track in high-speed railway: effect of train–track interaction and environment loads." Railway Engineering Science 28, no. 4 (November 30, 2020): 408–23. http://dx.doi.org/10.1007/s40534-020-00227-6.

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AbstractDue to the fact that ballastless tracks in high-speed railways are not only subjected to repeated train–track dynamic interaction loads, but also suffer from complex environmental loads, the fundamental understanding of mechanical performance of ballastless tracks under sophisticated service conditions is an increasingly demanding and challenging issue in high-speed railway networks. This work aims to reveal the effect of train–track interaction and environment loads on the mechanical characteristic variation of ballastless tracks in high-speed railways, particularly focusing on the ty

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40

Zheng, Enlai, Xinlong Zhou, and Sihong Zhu. "Dynamic response analysis of block foundations with nonlinear dry friction mounting system to impact loads." Journal of Mechanical Science and Technology 28, no. 7 (July 2014): 2535–48. http://dx.doi.org/10.1007/s12206-014-0611-7.

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41

Mousseau, R., and G. Markale. "Obstacle Impact Simulation of an ATV Using an Efficient Tire Model." Tire Science and Technology 31, no. 4 (October 1, 2003): 248–69. http://dx.doi.org/10.2346/1.2135271.

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Abstract When a vehicle travels over a large obstacle at a significant speed, dynamic loads are created that are severe enough to cause damage to its components. Prediction of these impact loads early in the design can greatly aid the vehicle development process. Thus, automobile manufactures have devoted considerable effort developing computer models to simulate durability events. An important part of any durability simulation is the tire model. This paper focuses on the problem of efficiently predicting dynamic loads that occur when an all terrain vehicle (ATV) impacts obstacle impact. An AT

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Ali, Saima, Xuemei Liu, Sabrina Fawzia, and David Thambiratnam. "Study of the Mechanical Performance of the Improved Multi-Layer Composites Under Drop Weight Impact Loads." International Journal of Structural Stability and Dynamics 20, no. 06 (June 2020): 2040002. http://dx.doi.org/10.1142/s0219455420400027.

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This study attempts to propose innovative multi-layer cement-based composites to have high impact resistance which could be used for runway. In this paper, the performances of two innovative multi-layer composite runway pavements using asphalt concrete-high strength concrete-cement-treated aggregate and asphalt concrete-high strength concrete-cement mortar in surface-base-subbase layer were evaluated under impact loads. ABAQUS/Explicit software was used to simulate loading condition and nonlinear stabilized runway pavement layers characteristics. In addition, a detailed parametric study was al

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Egorov, D. E., V. P. Dovgun, N. P. Boyarskaya, A. V. Jan, and A. S. Slyusarev. "Power factor correction in power delivery systems with mutipulse nonlinear loads." Power engineering: research, equipment, technology 22, no. 6 (March 26, 2021): 3–15. http://dx.doi.org/10.30724/1998-9903-2020-22-6-3-15.

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THE PURPOSE. Мutipulse rectifiers are widely used as a nonlinear loads in industrial distribution systems. The advantage of mutipulse rectifiers is low harmonic emission and high power factor. However input currents of mutipulse rectifiers have a wide spectrum including characteristic and noncharacteristic harmonics. This has a negative impact on the power quality. Shunt capacitors are the simplest form of reactive power compensation in industrial power distribution systems. However power systems with nonlinear loads suffer from severe harmonic distortion due to the parallel resonance between

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Geanta, Victor, Ionelia Voiculescu, Tudor Chereches, Teodora Zecheru, Liviu Matache, and Adrian Rotariu. "Behavior to Dynamic Loads of Multi-layer Composite Structures." Materiale Plastice 56, no. 2 (June 30, 2019): 460–65. http://dx.doi.org/10.37358/mp.19.2.5207.

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The explosive effect and high velocity penetration of the ballistic projectiles of various sizes, design and compositions, on impact with different targets (armors composed of a combination of different metals) are complex. Both practical experiments and mathematical modeling of the phenomena associated to the interaction projectile-target are required to estimate their effect or to design more efficient projectiles and armor. In this study, the basic element of the simulation model is an incendiary projectile of caliber 7.62 mm with medium piercing power, launched with a maximum speed of 750

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Currie-Gregg, Nancy J., and Kelly Carney. "Development of a finite element human vibration model for use in spacecraft coupled loads analysis." Journal of Low Frequency Noise, Vibration and Active Control 38, no. 2 (April 27, 2018): 839–51. http://dx.doi.org/10.1177/1461348418757994.

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Finite element human vibration models were developed and implemented for use in human-tended spacecraft-coupled loads analysis, an analytical process used to predict low-frequency spacecraft loads which occur during dynamic phases of flight of such as launch, ascent, or ascent aborts. Human vibration may also affect stress predictions for spacecraft systems which the crew interacts with, such as crew seats and crew impact attenuation systems. These human vibration models are three-dimensional, distributed-mass representations of 1st-percentile female, 50th-percentile male, and 99th-percentile

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Zhu, Rui, Baoquan Mao, Qijin Zhao, Zhiqian Wang, Xiaoping Han, Yuying Yang, and Hua Li. "Dynamic characteristics of Mn-Cu high damping alloy subjected to impact load." Advances in Mechanical Engineering 13, no. 4 (April 2021): 168781402110136. http://dx.doi.org/10.1177/16878140211013616.

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Mn-Cu high damping alloy is a twin-type damping alloy. Owing to its martensite twin structure at room temperature, it can convert vibration energy into heat energy, thereby reducing vibration. Although essentially a nonlinear elastic material, Mn-Cu damping alloys are treated as linear elastic materials in current engineering practice. However, introducing a constant damping coefficient alone will produce significant errors when modeling vibration reduction characteristics of the material, especially under impact loading. In this study, vibration test was performed on Mn-Cu damping alloy canti

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Park, S. U., B. J. Gilmore, and R. R. Singer. "Simulation of Nonlinear Dynamics of Liquid Filled Fuel Tanker Shell Structure Subjected to Rollover Collision With Validation." Journal of Mechanical Design 120, no. 4 (December 1, 1998): 573–80. http://dx.doi.org/10.1115/1.2829317.

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The transport of hazardous materials in truck cargo tanks can cause severe environmental damage as a result of the tank’s failure during a collision. Impact due to collision involves the transient dynamic response of the tank, fluid and their interaction. This paper develops a design oriented computational approach to predict the dynamic transient response of the tank shell structure subjected to impact loads during crash accidents. In order to compute the fluid and structural interaction, the finite element formulations for the added mass to the structure are developed and integrated with DYN

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Zhang, ZH, Y. Chen, HX Hua, and Y. Wang. "Crush dynamics of rubber tube under low velocity impact." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 3 (April 24, 2013): 426–40. http://dx.doi.org/10.1177/0954406213486871.

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It is proved that hyperelastic honeycomb coatings can attenuate underwater blast loads impinged on the ship hull. The crush behavior of a unit tube cell of the coating made of rubber material is investigated in this study. A series of tests are conducted to investigate the crush dynamic behavior of the tube under low velocity impact loads. Numerical analyses are carried out to explore the impact process of the rubber tube and the role of some dynamic parameters, thereby serve as a reference in the design of new coating. Some characteristics, such as the geometric imperfections, nonlinear elast

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Stumberger, Gorazd, Miran Roser, Ivan Skratek, and Viktor Tajnsek. "Experimentally evaluated impact of nonlinear loads on the energy transmission losses and distortion of voltage waveforms." Renewable Energy and Power Quality Journal 1, no. 08 (April 2010): 449–54. http://dx.doi.org/10.24084/repqj08.355.

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Marino, Enzo, Claudio Borri, and Udo Peil. "A fully nonlinear wave model to account for breaking wave impact loads on offshore wind turbines." Journal of Wind Engineering and Industrial Aerodynamics 99, no. 4 (April 2011): 483–90. http://dx.doi.org/10.1016/j.jweia.2010.12.015.

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