基于减速坎路面的某六轮特种车瞬态动力学仿真与实验

Simulation and Verification of a Six-Wheel-Vehicle Transient Dynamics Response to a Deceleration Bump

针对结构和行驶路况复杂的X06E六轮驱动全地形车,建立了其整车刚体动力学模型,通过对车身进行模态分析,提取了车身柔性体模型,从而建立了X06E六轮驱动全地形车刚-柔耦合系统动力学模型。针对某试验场减速坎实际尺寸建立了相应的路面模型,并以此为输入进行了X06E六轮车瞬态动力学仿真分析,与试验场减速坎路面实际行驶工况采集的车轮垂直力和车身应变进行了对比验证。结果表明:无论是车轮垂向力,还是车身应变,仿真和试验结果趋势和幅值吻合较好,为六轮驱动全地形车动态设计和分析提供了参考。

A rigid body full-vehicle dynamics model of X06E six-wheel-driven all-terrain vehicle with complex structure and driving conditions is established firstly.Then its flexible body model is further extracted by modal analysis.Thus,the rigid-flexible coupling system dynamics model of X06E six-wheel all-terrain vehicle is correspondingly established.A road input model of a deceleration bump in a test site is established for simulation.Based on the actual driving conditions on the deceleration road in the test site,the transient dynamics simulation analysis of X06E six-wheel vehicle is carried out.At the same time,the wheel vertical force and body strain collected under actual driving conditions are compared and verified.The results show that the trend and amplitude of simulation and test results are in good agreement with each other,for both the wheel vertical force and body strain.The analysis results can provide reference for dynamic design and analysis of the six-wheel-driven all-terrain vehicles.