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D. Gong, J. Zhang, J. Zhou, S. Chen, "Eccentric Load on Vehicle Dynamics Performance based on Refinement Modeling", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 31.18, 2022, doi:10.4203/ccc.1.31.18

Keywords: subway vehicle, finite element model, modal analysis, eccentric load, vehicle dynamics.

Abstract

The finite element models of the load-bearing structure and the curb state of the metro vehicle body were established respectively, and the effects of different elements, mesh sizes and five curb car body modeling methods on the modal calculation results of the car body were studied. The vehicle system dynamics model is established by polycondensation of the finite element model, and the influence of the eccentric load of the vehicle body on the vehicle dynamic performance index is calculated and analyzed. The results show that: 25mm quadrilateral element mesh is used to divide the finite element model of the car body, which can meet the needs of the car body for modal calculation; the mass point-equipment frame-hanging method is used to simulate the frame-type box structure of the under-vehicle equipment with a skeleton, which can increase the rigidity of the connection between the equipment and the chassis, thereby increasing the modal frequency of the vehicle body. Compared with the lateral eccentric load, the longitudinal direction has a greater impact on the lateral and vertical running stability. After the longitudinal eccentric load occurs, the vertical stability index of the load-reducing end bogie will increase, resulting in poor running stability.

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Front Page Browse CCC CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Conferences ISSN 2753-3239 CCC: 1 PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON RAILWAY TECHNOLOGY: RESEARCH, DEVELOPMENT AND MAINTENANCE Edited by: J. Pombo Paper 31.18 Eccentric Load on Vehicle Dynamics Performance based on Refinement Modeling D. Gong¹, J. Zhang¹, J. Zhou¹ and S. Chen² ¹Institute of Rail Transit, Tongji University Shanghai, China ²Wuhan Metro Operation Co., Ltd. Wuhan, China doi:10.4203/ccc.1.31.18 Full Bibliographic Reference for this paper D. Gong, J. Zhang, J. Zhou, S. Chen, "Eccentric Load on Vehicle Dynamics Performance based on Refinement Modeling", in J. Pombo, (Editor), "Proceedings of the Fifth International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Edinburgh, UK, Online volume: CCC 1, Paper 31.18, 2022, doi:10.4203/ccc.1.31.18 Keywords: subway vehicle, finite element model, modal analysis, eccentric load, vehicle dynamics. Abstract The finite element models of the load-bearing structure and the curb state of the metro vehicle body were established respectively, and the effects of different elements, mesh sizes and five curb car body modeling methods on the modal calculation results of the car body were studied. The vehicle system dynamics model is established by polycondensation of the finite element model, and the influence of the eccentric load of the vehicle body on the vehicle dynamic performance index is calculated and analyzed. The results show that: 25mm quadrilateral element mesh is used to divide the finite element model of the car body, which can meet the needs of the car body for modal calculation; the mass point-equipment frame-hanging method is used to simulate the frame-type box structure of the under-vehicle equipment with a skeleton, which can increase the rigidity of the connection between the equipment and the chassis, thereby increasing the modal frequency of the vehicle body. Compared with the lateral eccentric load, the longitudinal direction has a greater impact on the lateral and vertical running stability. After the longitudinal eccentric load occurs, the vertical stability index of the load-reducing end bogie will increase, resulting in poor running stability. download the full-text of this paper (PDF, 5 pages, 288 Kb) go to the previous paper go to the next paper return to the table of contents return to the volume description
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