Simulation and Verification of Dynamic Response of Railway Wagon on Railway Track
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摘要: 针对大系统仿真分析方法与试验结果出现偏差问题，基于实际线路测试数据，以车体子系统为仿真对象，辅助于模拟台架的试验数据，建立了26个自由度的多体仿真模型，实现了车体线路动态响应的仿真计算. 结果表明：摇枕垂、横向加速度响应结果仿真与试验RMS （root mean square）误差最大值为9%. 在1.5～15.0 Hz主要频率段，车体枕梁垂、横向振动加速度的试验结果和仿真结果的RMS误差低于8.57%，车体关键焊缝仿真与试验的动应力响应波形基本一致. 通过与试验结果的对比验证，仿真结果基本反映了车体在实际线路运行时的动态响应情况.Abstract: For resolving errors between a simulation analysis and the test results of a large system, a multi-body simulation model of a railway wagon with 26 degrees of freedom was created using test data from a real test rig on a railway track and by incorporating the wagon body’s subsystems into the simulation object in order to realise a simulation calculation of the dynamic response of the railway wagon. The results show that the maximum RMS (root mean square) error between the simulation and the test of the wagon body bolster’s vertical and lateral vibration acceleration is 9%. Furthermore, the RMS error between the simulation and test of the wagon body bolster’s vertical and lateral vibration acceleration is less than 8.57% in the 1.5–15.0 Hz frequency range. Finally, the response signal waveforms of the dynamic stress of the simulation and that of the wagon body’s key welds are almost identical. The comparison and validation of the simulation and test results show that the simulation results substantially reproduce the dynamic response conditions of the railway wagon running along a railway track.
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Key words:
- rails /
- dynamic simulation /
- simulation and test /
- full-scale fatigue test rig
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图 12 模拟摇枕振动加速度响应的PSD分析结果
Figure 12. PSD analysis results of acceleration response of dummy bolster
图 13 车体枕梁垂向加速度对比的仿真结果
Figure 13. Comparison of vertical acceleration of body bolster with the simulation results
图 14 车体枕梁横向加速度对比的仿真结果
Figure 14. Comparison of lateral acceleration of body bolster with the simulation results
表 1 模态频率结果对比
Table 1. Results comparison of modal frequency
振型 系统试验模态 系统仿真模态 侧滚 1.25 1.45 扭转 4.52 4.66 
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表 2 车体枕梁振动加速度的统计结果
Table 2. Statistical results of acceleration of body bolster
测点编号 RMS RMS误差/% 试验 仿真 AZN11 0.040 0.038 4.25 AYN11 0.014 0.013 8.57
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