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运用多体系统分析方法,建立轮轨系统的准弹性接触模型,对摆动式转向架货车的动力学性能进行仿真,运用有限元方法和Hook定律将弹簧托板等效为弹簧、刚体加弹簧以及柔性体,并在动力学彷真中评估这3种情况对货车车体振动响应的影响,找出系统动力学分析中合理等效薄壁部件的方法。通过结果分析,在车辆低速运行阶段,为加快分析速度可将弹簧拖板等效为1个弹簧元件,而在高速运行阶段,需要将弹簧拖板等效为柔性体,以考虑弹簧拖板自身振动对车辆整体性能的影响,使车辆设计趋于合理。
The multi-body system analysis method is used to establish the quasi-elastic contact model of the wheel-rail system. The dynamics performance of the wagon truck is simulated. The finite element method and Hook’s law are used to evaluate the spring plate as a spring, a rigid body plus a spring, Flexible body, and in the dynamic simulation to evaluate the impact of these three conditions on the vibration response of the wagon body, to find out the reasonably equivalent thin-walled components in the system dynamics analysis. Through the analysis of the results, in the low-speed operation phase of the vehicle, the spring carriage can be equivalent to a spring element to speed up the analysis. In the high-speed running stage, the spring carriage needs to be equivalent to a flexible body to consider the spring carriage itself Vibration on the overall performance of the vehicle, so that vehicle design tends to be reasonable.