基于抗蛇行减振器实时特性的车辆动力学性能分析

Vehicle Dynamics Analysis Based on Yaw Damper Real-time Characteristics

利用流体建模仿真软件AMESim和多体动力学分析软件SIMPACK分别建立抗蛇行减振器和高速车辆的仿真模型,通过联合仿真比较抗蛇行减振器阻尼分别采用F—v实时特性曲线和等效线性阻尼时车辆的动力学性能,并对比分析车辆在抗蛇行减振器失效、车轮磨耗后车辆的运动稳定性。计算结果表明:采用F—v实时特性曲线时车辆的临界速度高于采用等效线性阻尼的临界速度,且运行平稳性也更好,但二者对车辆的曲线通过安全性的影响不大;减振器失效时,车辆的蛇行运动失稳临界速度显著降低。

The simulation models of the yaw damper and the high-speed train are built by use of the fluid modeling and simulation software AMESim and multi-body dynamics software SIMPACK.Research on co-simulation using the simulation models of the yaw damper and the high-speed vehicle for comparing the dynamic performance with the F—vreal-time characteristic curves or equivalent linear damping of the yaw damper is made.And the motion stability after the yaw damper failure and the wheel wear is analyzed.The results show using F—vreal-time characteristic curve has higher critical speed and better stationary performance than that with the equivalent linear damping,but the curve negotiation performance indexes with two different characteristics are almost the same.The critical speed is significantly decreased in the case of yaw damper failure.