基于多柔体动力学的地铁单转向架性能研究

The research on performance of metro bogie curve passing process based on multi flexible dynamics

为系统分析地铁转向架在曲线通过过程中的动力学性能,以单个地铁转向架整体为研究对象,建立包含轮轨接触和各部件真实运动关系的多柔体地铁单转向架仿真模型。根据实际运行情况设计驱动轴运动曲线来模拟真实的列车运行过程,计算其曲线通过过程的垂向、横向加速度、左右轮重以及部分关键部位的动应力。分析转向架的平稳性与稳定性,研究转向架的动力学性能并与实验数据进行对比,结果基本一致。为转向架的研究与分析提出一种更接近实际运行情况的大型多柔体动力学系统仿真建模方法。

To analyze dynamic performance of metro bogie＇s course of traveling along curves systematically, a multi flexible simulation model of the whole bogie was built, which takes the mutual contact between wheels and tracks and the motion relationship among different parts of the bogie into account. The curve of the actuating axiss motion was designed to simulate the real process of electric motors actuating process. The vertical and horizontal acceleration, the wheel load of each side and the dynamic stress of some particular parts of the bogie was calculated. The ride stability and running stability was analyzed. The dynamic performance of the bogie was researched and compared to the experiment data. The simulation result is quite consistent to the experiment data. A new method of system simulation modeling which is closer to the real running state was put forward for the research and analysis of bogies based on multi flexible body dynamics.