| 车辆冲击数值模拟研究 |
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| 引用本文： | 孙树磊,李芾,黄运华,丁军君.车辆冲击数值模拟研究[J].西南交通大学学报,2013,26(3):507-512. |
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| 作者姓名： | 孙树磊 李芾 黄运华 丁军君 |
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| 基金项目： | 国家863计划资助项目(2008AA030706)国家自然科学基金资助项目(50821063)中央高校基本科研业务费专项资金资助项目(SWJTU12CX041) |
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| 摘 要： | 为了研究车辆冲击对车辆运行安全性的影响,依据缓冲器计算理论,利用Simulink软件建立了货车缓冲器动力学修正模型;根据车辆系统动力学理论及车钩计算模型,利用UM软件建立了装用K6转向架的C80货车完整自由度车辆模型.将上述模型联合仿真,实现了车辆冲击的数值模拟.计算结果表明:两组车之间的冲击比一辆车与一组车间的冲击危害更大;车钩和从板质量使车辆产生高频小幅的车钩力;悬挂因素导致完整自由度车辆冲击模型的车钩力比单自由度车辆冲击模型小21.7%;车辆在纵向、横向和垂向存在耦合关系,轮轨垂向力随着冲击质量以及重心高度的增加而增大,轮轨横向力随着车端纵向压力的增加和曲线半径的减小而增大.
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| 关 键 词： | 缓冲器 车钩 车辆冲击 特性曲线 动力学模型 |
| 收稿时间： | 2012-06-13 |
Numerical Simulation of Railway Vehicle Impacts |
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| SUN Shulei,LI Fu,HUANG Yunhua,DING Junjun.Numerical Simulation of Railway Vehicle Impacts[J].Journal of Southwest Jiaotong University,2013,26(3):507-512. |
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| Authors: | SUN Shulei LI Fu HUANG Yunhua DING Junjun |
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| Abstract: | In order to study the effect of vehicle impacts on vehicle safety, a modified draft gear dynamic model was built in Simulink based on theory of draft gear, and a full degree-of-freedom (DOF) model of C80 freight car and K6 bogie were built in UM based on the vehicle system dynamics and a coupler model. The vehicle impact was co-simulated by combination of above models using Simulink and UM. The results indicate that the problem of energy dissipation on the transition curve can be solved and the characteristic of draft gear can be simulated by the correction model; the impact between two groups of vehicles is more harmful than that between a vehicle and a group of vehicles; low-amplitude and high-frequency coupler force is generated by the mass of the coupler and follower plate; the coupler force of the full-DOF impact model is 21.7% less than that of singe-DOF model due to the suspension; a coupling relationship between longitudinal, lateral, and vertical directions can be found in the vehicle impact, so the rail-wheel vertical force increases with an increase in the impact mass and the height of center of gravity, and the rail-wheel lateral force increases with an increase in the longitudinal force or a decrease in curve radius. |
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