车辆-路面耦合振动系统模型与仿真分析
Dynamic Model and Simulation of the Vehicle-road coupled system
基于二分之一的四自由度车辆振动模型,把路面简化成Kelvin地基上Euler梁,通过非线性动态轮胎力,建立车路耦合系统的分析模型及其动力平衡方程;通过轮胎和路面的位移协调条件对耦合方程进行解耦,采用模态叠加法和New-mark积分法对耦合方程组进行求解。数值分析表明:轮胎作为参振子系统对路面的影响基本可以忽略不计,考虑轮胎作为参振子系统下车体的最大竖向位移是没有考虑情况下的1.2倍左右。并对车辆运动初速度、加速度、以及路面不平顺对车体振动影响进行了分析。
The vehicle is simplified as the four-freedom vibrating model. The road is supposed as the Euler Beam on the Kelvin base. And then by the dynamic tire stress, the dynamic model and functions of the vehicle-road coupled system are derived. The functions are been divided with the compatibility deformation condition between the road and the tire, and solved with mode synthesis method and New-mark method. The results indicate that the effects of the tire-subsystem on the road can be ignored. However, its effects on the vehicle are very large. And the effects of the acceleration, initial speed and roughness of road on the vehicle are also analyzed.
车辆 / 路面 / 动态轮胎力 / 振动模型 / 仿真分析 {{custom_keyword}} /
vehicle / road / dynamic tire stress / dynamic model / simulation {{custom_keyword}} /
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