三向轮胎力作用下路面动力响应分析

摘要

采用两自由度非线性汽车模型和地基上双层薄板建立三向轮胎力作用下的车-路系统.将非线性Gim模型与垂向点接触轮胎模型相结合对三向轮胎力进行描述.利用伽辽金方法推导三向轮胎力作用下路面响应的解析解,研究制动移线工况下各轮胎分力对路面响应的贡献,比较只考虑垂向轮胎力作用和考虑三向轮胎力作用时路面响应的差别,并分析系统参数对此差别的影响.研究成果有利于揭示车辆对道路的三向作用机理,为道路响应计算和道路寿命预测提供新的研究思路.%The vehicle-road system acted by three-directional tire forces was modeled as a 2DOF vehicle moving along a simply supported double-layer rectangular thin plate on a nonlinear visco-elastic foundation. The nonlinear Gim model and vertical point contact model were used to describe tire forces. The pavement response excited by the moving three-directional tire forces was obtained analytically by using Galerkin method. The influence of tire forces on pavement response was studied under the vehicle's braking and lane changing. The pavement response under vertical tire force was compared with that under three-directional tire forces. The effect of parameters on this difference was also analyzed. The results will be benefit to researching the mechanism of three-directional interaction between vehicle and road and proposing a new research scheme of pavement response calculation and lifespan forecast.