基于多体接触碰撞的松软地面车轮沉陷仿真  

Numerical Simulation of Wheel Sinkage on Soft Terrain Based on Multibody Contact Problem

作　　者：左艳蕊[1] 宗志坚[1] 刘忠途[1] 程源[1] 樊世超[2] 

机构地区：[1]中山大学工学院,广州510006 [2]北京卫星环境工程研究所,北京100094

出　　处：《农业机械学报》2009年第10期33-38,23,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：广东省自然科学基金资助项目(6300319);广东省科技厅科研项目(2007B080401011)

摘　　要：提出了一种大规模多体系统接触碰撞理论与车辆地面力学理论相结合的仿真方法,并基于多体动力学仿真平台开发了车轮土壤相互作用仿真模块。基于该方法建立的土壤动力学模型和车轮土壤接触碰撞模型,进行了车轮沉陷的仿真。根据记录,在普通配置台式计算机上模拟土槽系统30 s的运动,仅需20 min。在相同实验条件下,仿真结果与土槽实验结果趋势一致,仿真曲线与土槽实验曲线吻合良好。由此表明该仿真算法能够满足越野行驶仿真的需要。A new approach to realize the wheel-soil interaction simulation was proposed which applied the large-scale multibody contact problem and vehicle terramechanics theory.Using this method,we developed a wheel-soil simulation module in self-developed multibody dynamics simulation platform. Based on modeling of soil and wheel-soil contact,the computational implementation for wheel sinkage was depicted in detail.According to records,it needs only 20 min to simulate the motion of wheel-soil testbed system simulation and could meet the abom 30 s on a microcomputer with general configuration experimental results have good consistency. This indicates that requirement of off-road driving simulation. Under similar conditions the simulation algorithm

关 键 词：车辆地面力学 松软地面 车轮沉陷 多体动力学 接触碰撞 仿真 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] U461[自动化与计算机技术—计算机科学与技术]