汽车振动系统的简化及数学模型的建立

On Setting up Simplified and Mathematical Model of Truck Vibration System

该文提出汽车八自由度振动系统力学模型 ,用前后四轮的路面随机激励作为系统输入 ,用广义拉格朗日方程和虚位移原理建立汽车振动系统数学模型。在2种路面和 2种车速工况下 ,对汽车平顺性及频率响应的模拟 ,其结果与实验吻合较好。该模型对载货货车的平顺性计算和动参数的优化设计有一定参考价值。

The 8 freedom dynamical model for the truck vibration system is put forward. Taking the spectrum of road excitation as the input of 4 whell, a mathematical model was set up based on Lagrange equation and principle of virtual displacement. Under the two different conditions of both read surface and velocity,the truck riding smoothness was simulated. The experimental results fit with the calculation ones. Therefore, this article is of certain value to the truck riding smoothness simulation and dynamical parameters optimization design.