履带车辆高速行驶承重能力优化设计仿真

摘要

For the problem of track shedding and serious wear caused by violent fluctuation of dynamic track tension when tracked vehicles drive at high speed,we improved the traditional structure of track mechanism in the paper.Dynamic track tension fluctuation was reduced by realizing track circular motion through wheel-track transform.In high speed condition of tracked vehicles,the relationship between the preload and the dynamic track tension was required to be calculated accurately.Through the analysis of the driving mechanism components,the change law of the dynamic tension of the track at high speed was studied,and the mathematical model of the dynamic tension force was established.Based on multi-body dynamics software RecurDyn,the simulation model of the vehicle was established,and the dynamic tension was simulated under different preload conditions.The simulation results show that the proper preload makes tracked vehicle dynamic tension fluctuations smaller by wheel-track transform.The results show that the mathematical model of the dynamic track tension is effective,and the structure of the wheel-track transform can meet the requirements of the high speed performance of the tracked vehicle.%针对履带车辆高速行驶时,履带动态张紧力的剧烈波动导致的履带脱落和磨损严重问题,对传统履带行驶机构进行结构改进,通过轮履变换实现履带环圆形运动,减弱履带动态张紧力波动.履带车辆高速行驶工况下,需要对预紧力和履带动态张紧力的关系进行精确数值计算.通过对行驶机构部件受力分析,研究高速行驶时履带动态张紧力的变化规律,建立履带动态张紧力的数学模型.基于多体动力学软件RecurDyn建立轮履变换车辆仿真模型,对不同预紧力条件下履带动态张紧力进行运动仿真.仿真结果显示,适当预紧力条件下轮履变换使履带车辆动态张紧力变化波动变小.结果表明履带动态张紧力的数学模型有效,轮履变换结构能够满足履带车辆重载高速行驶性能要求.