混合空气悬架客车侧倾稳定性分析

某型客车前后悬架均为混合空气悬架，需要对该型客车进行侧倾稳定性分析计算。首先，确定该客车前后悬架的侧倾中心和整车侧倾中心线；其次，计算出侧倾力臂、侧倾力矩；然后，推导了悬架侧倾角刚度计算公式，讨论了两种横向稳定杆垂直刚度计算方法——基于材料力学经典理论的方法和有限元分析法；最后，计算了该型客车的侧倾角刚度、整车在0．4g侧向加速度时的侧倾角，并根据相关标准对该型客车的侧倾稳定性进行了评价。这种客车侧倾稳定性分析方法适用于混合空气悬架的设计计算以及侧倾仿真模型的校核计算。

Analysis of Rolling Stability of Coaches with Compound Air Suspensions

Front suspension and rear suspension of some kind of coaches are all compound air suspension systems. The rolling characteristics of this kind of coaches need to be analyzed. Firstly the rolling centers of front suspension and rear suspension, and the rolling center line of a coach are determined. Secondly the rolling moment arm and rolling torque are computed. Thirdly the computation formulas of suspension rolling angle stiffness are derived. During the derivation process, two methods of analysis of vertical stiffness of sway bars are discussed. One is based on classic theory of mechanics of materials. The other is FEA method. Finally the rolling angle stiffness of a coach and the rolling angle of a coach sustaining 0.4g lateral acceleration are computed. Moreover the rolling characteristic is valued according to relative standard. This method of analysis of rolling characteristic of a coach is available for the design computation of compound air suspension systems and model checking of rolling simulation of a suspension.