悬架扭杆和稳定杆刚度对车辆转向灵敏度的影响分析

为研究悬架和横向稳定杆的刚度对车辆操纵性能的影响,进而为悬架设计和调整提供参考,以某轻型客车为原型,在ADAMS/Car中构建了无横向稳定杆和前悬架装配横向稳定杆的两辆虚拟样车及其变型车,通过转向盘转角阶跃输入仿真试验,得到了前悬架扭杆和横向稳定杆角刚度对车辆转向灵敏度的影响曲线。研究结果表明,对于无、有稳定杆两种车型,扭杆角刚度自0.5倍增大至2.0倍基准刚度,转向灵敏度分别产生相对于经验值域约20%和1%的下降量;横向稳定杆角刚度自基准角刚度减小至0或增大至2.0倍基准刚度,转向灵敏度分别产生相对于经验值域约10%的增长量或1%的下降量。

Influence analysis of stiffness of suspension torsion bar and anti-roll bar on vehicle steering sensitivity

In order to study the effect of stiffness of the suspension and anti-roll bar on the vehicle handling performance, and provide reference for suspension design and adjustment afterwards, two virtual prototype and their variants without anti-roll bar and front suspension assembly anti-roll bar, based on a light bus for the prototype, were structured in ADAMS/Car. Through simulation experiment with input of steering wheel angle step, the curves of effect of angle stiffness of front suspension torsion bar and anti-roll bar on vehicle steering sensitivity were obtained. The results show that, on two models with and without anti-roll bar, steering sensitivity respectively produces about 20% and I% decline of the range of experience while the angle stiffness of torsion bar increased from 0.5 to 2.0 times of the base stiffness;steering sensitivity respectively produces about 10% increase or 1% decline of the range of experience while the angle stiffness of anti-roll bar decreases from the base angle stiffness to 0 or increases to 2.0 times of the base stiffness.