分析双轴汽车模型平顺性的推广方法

An Extended Method to Analyze the Ride Comfort of the Two-Axle Vehicle Model

推广了双轴汽车模型前、后端双质量系统频响函数不同时的平顺性分析方法 ,并根据三组前、后双质量系统的参数画出了相应的幅频特性曲线及车身上不同点的垂直振动均方根值与该点位置关系曲线 用该方法可以看出 ,改变前、后端双质量系统的参数 ,可以改变车身垂直振动和俯仰角振动的频率结构 ,从而避开敏感的振动频率范围 用该方法也容易确定沿车身纵轴线方向垂直振动均方根值最小的点 。

The way to analyze the ride comfort of the two? axle vehicle model which the front frequency response function of the two mass system is unequal to the rears is popularized. Based on the three groups of different parameters of the front and rear two? mass system, the amplitude frequency characteristic curves and the relation curves of the point place to the vertical vibration rms value of the different points on the vehicle body are drawn. As a result, the frequency structure of the vertical and pitching vibration on the vehicle body can be changed by changing the parameters of the front and rear two? mass system, then can avoid the sensitive vibration frequency scope. It is easy to confirm the point where the vertical vibration rms value is minimum at the longitudinal axle line of body with this method, thus, offering basis for the optimum positioning of seats.