基于软土路面的越野车辆平顺性研究

摘要

The virtual prototype model of an off -road vehicle is built based on ADAMS software, and the user - written subroutine for calculating interaction force between elastic tire and soft soil is set up according to the load - sinkage theory. This is done to accurately simulate and predict the ride comfort of the off - road vehicle driving on the soft soil. The non - linear contact simulation between elastic tire and soft soil is implemented successfully by using ADAMS software and changing the soil related parameters, and off-road vehicle dynamic is simulated on the random input running test. The simulation result shows that the body acceleration, suspension dynamic deformation and tire dynamic load of the vehicle all change and the displacement of body increases obviously as terrain deformation increa-ses. The suspension adapted to the hard ground is not adapted to the soft road. This model can accurately simulate the impact of the road deformation on vehicle ride.%研究不同路面上行驶越野车平顺性问题,针对软土路面振动特性,为了准确的仿真和预测越野车在软土路面上的平顺性,通过基于载荷沉陷理论开发出用于计算弹性轮胎-软土路面接触力的ADAMS用户子程序,在某越野车整车虚拟样机模型中实现了弹性轮胎与软土路面之间非线性接触仿真,再改变子程序中软土路面相关参数对越野车进行随机输入行驶试验仿真,仿真结果表明,随着路面变形的增大,轮胎动载荷,悬架动挠度均有较大变化,车身的振幅有显著增大,说明适应于硬地面的悬架不适应于软土路面.通过模型能够较准确地仿真由于路面变形对整车平顺性的影响,为设计提供了科学依据.