基于ANSYS与SIMPACK联合仿真的柔性轮对动力学仿真分析

Dynamics Simulation Analysis of Flexible Wheelset Based on ANSYS and SIMPACK

介绍了有限元软件ANSYS与多体动力学软件SIMPACK联合仿真的方法,利用ANSYS分析得到的结构和模态等信息将轮对进行弹性化处理,而仍将车体、构架等部件作为刚体;在SIMPACK软件中建立了完整的刚柔耦合车辆系统动力学模型,比较分析了柔性轮对和刚性轮对车辆动力学的影响。研究表明:在直线运行速度不高时,轮对为柔性对车体动力学性能基本没有影响,在车辆高速运行时,考虑轮对的柔性是非常有必要的;在通过曲线时,柔性轮对模型的曲线通过性能略优于刚性轮对模型,更加符合实际情况。

A co-simulation method of the FEM software ANSYS and multi-body dynamics software SIMPACK was introduced. The wheelsets was taken as flexible bodies with FEM structure and mode, and carbody and frame as rigid ones; In the SIMPACK, rigid-flexible coupled dynamics model of a complete railway vehicle system was established. The dynamic characteristics of flexible wheelset model and rigid wheelset model were compared and analyzed. The results showed that： wheelsets flexible characteristics influenced vehicle dynamics little at lower speed linear running but should be considered at high speed; when passing a curve, calculation result of flexible wheelsets model was less better than the rigid ones, which was agree to the practice.