本文建立了一个九自由度线性汽车模型来仿真汽车对路面随机输入的响应,以改进的四次幂定律为评定汽车对道路破坏的指标,分析了装载量、车速以及车身和悬架参数对道路破坏的影响,并对悬架系统的参数进行了优化。为具有道路友好性的汽车的设计提供了依据。 In this paper, a nine-degree-of-freedom linear vehicle model is built to simulate the car’s response to random input of the road. Based on the improved fourth power law, which is used as an index to evaluate the damage to the road, the paper analyzes the influence of loading, vehicle speed and body and suspension parameters on the road The effects of vandalism were optimized and the parameters of the suspension system were optimized. Provided a basis for the design of road-friendly cars.