装有抗侧翻液压互联悬架校车的动态特性分析
Dynamic Analysis of School Bus Fitted with Roll Resistant Specific Hydraulically Interconnected Suspension System

基于牛顿第二定律和传递矩阵法，建立装有抗侧翻液压互联悬架校车全车模型的机液耦合系统动力学方程。完成该非线性系统特征值辨识及模态分析，并对比分析校车安装液压互联悬架前后的动态特性。分析了阻尼阀参数对校车主要模态动态特性关系的影响，结合整车模态匹配策略及阻尼特性需求，提出基于搜索法的阻尼阀参数设计方法，并通过校车动态特性分析验证了该方法的有效性。分析结果表明，抗侧翻液压互联悬架可显著提高车辆的抗侧翻性能，通过合理设计阻尼阀参数可极大改善该耦合系统的阻尼特性。
Based on the transfer matrix method and Newton's second law, this paper derives the hydraulic-mechanical coupled multi-body dynamic equation of model of a school bus fitted with roll resistant specific hydraulic interconnected suspension system. After finishing eigenvalue identification and modal analysis, a comparsion on dynamic characteristics between vehicles which is installed or uninstalled the hydraulic interconnected suspension is produced. To research the coordination of dominant contribution modes of vehicle, the principle of the damping valves is discussed. Based on the modal matching strategy and the requirement for damping characteristic, a design method of damping valves is proposed and proved availably. The study results indicate that the roll resistant specific hydraulic interconnected suspension system can promote the capacity of anti-rollover specific observably and with reasonable comfort performance, the damping characteristics of the coupled system could be optimized