基于行驶仿真试验的轮边减速器疲劳寿命预测研究

RESEARCH ON PREDICTION OF FATIGUE LIFE OF WHEEL-SIDE REDUCER IN TRACKED VEHICLE BASE ON RUNNING SIMULATION

轮边减速器是重型车辆的重要降速增扭传动机构,然而轮边减速器在设计阶段由于缺乏准确可行的工作载荷数据,采用的设计载荷是静态载荷而非实际工作载荷。由于实际工作载荷和设计采用的静载荷存在相当大的差距,因此在设计载荷下的得出的轮边减速器的寿命远远高于实际载荷作用下的实际寿命。为解决实际工况下轮边减速器所承受实际动态载荷的难题,本文基于MSC.ATV建立了某重型车辆虚拟行驶试验平台,获得了轮边减速器各零部件承受的动态载荷。基于疲劳仿真分析软件,获得了轮边减速器重要部件行星架及传动齿轮的疲劳寿命。预测仿真实例证明了对轮边减速器构件进行疲劳寿命预测的可行性,解决了复杂工况载荷条件下重型车辆轮边减速器疲劳寿命预测的难题,研究成果还可推广应用于相关工程领域,具有非常重要的实用意义。

As the most of important drive gear in tracked vehicle, wheel-side reducer is capable of reducing speed and generating large torque. While it is designed with the static strength theory without correct and feasible data, the static data is much different from the dynamic data, high failure rate in use result low reliability of the whole system. In order to solve the problem the virtual running test platform is built based on ADAMS. ATV, and the dynamic loads suffered by wheel-side reducer in different working condition is oblained. Then the fatigue life of planetary frame and gear are analyzed with fatigue life prediction model. The study case proves the new method is feasible to predict fatigue life of wheel-side reducer, and the difficulty of life prediction of tracked vehicle under complicated conditions is solved. The study results can widely extended to other engineering domains, and the prospective of analysis method applied in related engineering system is presented.