线性板簧的迟滞特性对车辆平顺性影响

通过分析板簧迟滞特性对车辆在不同路面上行驶平顺性的影响,探讨合理选择板簧悬架减振器阻尼的方法.采用1/4车辆模型,在考虑和不考虑板簧迟滞特性2种情况下分析了车辆在不同路面上的簧载质量加速度均方根值.考虑到模型非线性,采用时域求解,并以随机生成的路面数据和一组实测路面数据作为模型输入.分析结果表明板簧迟滞特性对行驶平顺性的不利影响在良好路面上表现得更为明显,因此减振器阻尼系数应根据路面不平度等级加以选择.对于采用板簧悬架的车辆,减振器在压缩行程和复原行程的阻尼比范围应分别为0.1~0.2和0.2~0.3.

Influence of linear leaf springs’ hysteresis behavior on vehicle’s ride

A method was investigated to select proper damping coefficients of the damper used for the leaf spring suspension, based on the analysis of the influence of leaf springs' hesteresis behavior on vehicle’s riding on different kinds of roads. Based on a quarter vehicle model, the root of mean squared acceleration of sprung mass was analyzed on different grades of roads with and without consideration of leaf springs' hysteresis behavior. The model was solved in time domain due to its nonlinearities. Both randomly produced road data and a group of real road data were used as inputs of the model. Results show the hysteresis behavior is more harmful to vehicle’s riding comfort on a high quality road than on a poor quality road, and therefore the damping coefficients of dampers should be selected according to road grades. For vehicles with leaf spring suspensions, the dampers’ damping ratios for jounce travel should be 0.1~0.2 and that for rebound travel be 0.2~0.3.