柔性构架对车辆振动性能及运行安全性的影响研究

Study on Influence of Flexible Frame on Vehicle Vibration Performance and Operational Safety

为了研究柔性构架对车辆运行安全性的影响,以某型号动车组为研究对象,建立其构架的有限元模型。分别建立多刚体模型和构架刚柔耦合模型,通过观察相关测点的振动响应,研究柔性构架对车辆振动性能的影响;通过对比两种模型同一轮对上的轮轨力、脱轨系数、轮重减载率等安全性指标的变化,研究柔性构架对车辆运行安全性的影响。结果表明:在进行车辆振动及运行安全性分析时,有必要考虑车体柔性,以保证计算结果更接近实际情况。

In order to study the influence of the flexible frame on the safety of vehicle operation,the finite element model of the frame was established with a certain type of EMU as the research object.The multi-rigid body model and the frame rigid-flexible coupling model were built respectively.The influence of the flexible frame on the vehicle vibration performance is studied by observing the vibration response of the selected measuring points.Comparison on the changes in safety indicators such as wheel-rail force,derailment coefficient,and wheel load reduction rate on the same wheel set of the two models is made to study the influence of the flexible frame on the safety of vehicle operation.The results show that it is necessary to consider vehicle body flexibility when analyzing vehicle vibration performance and operational safety,ensuring that the calculation results are closer to the actual situation.