摘要
以某款国产轿车为研究对象,运用汽车动力学理论将轿车简化为二自由度振动模型,推导出了复频响应函数.利用MATLAB软件计算并绘制出车身加速度、悬架动挠度及车轮动载的幅频特性曲线,并求出汽车在C级路面上行驶时振动响应量的均方根值.研究悬架刚度、减震器阻尼系数对振动响应量的影响,最终得到了悬架参数对汽车行驶平顺性的影响规律,对汽车平顺性研究有一定价值.
A domestic car is chosen as the research object,which two DOF vibration model is established according to the vehicle dynamics theory.Then,the complex frequency-response functions are derived.The amplitude-frequency characteristic curves of vehicle body acceleration,suspension deflection and dynamic tire load are studied.And root mean square value of each vibration response is calculated by MATLAB when the car is running on grade C road.Next,the effect of suspension′s stiffness and damping coefficient on vibration response is studied respectively.In the end,the influence rule of each parameter of suspension on the vehicle ride comfort is obtained.It is valuable for the research of vehicle ride comfort.
出处
《陕西科技大学学报（自然科学版）》
2016年第5期147-151,共5页
Journal of Shaanxi University of Science & Technology
基金
陕西省科技厅自然科学基础研究计划项目(2014JM7264)
关键词
汽车动力学模型
幅频特性
功率谱密度
平顺性
vehicle dynamics model
amplitude frequency characteristic
power spectral density
ride comfort
