惯质系数对车辆ISD悬架系统频率特性的影响研究

Influences of inertial mass coefficient on frequency characteristics of ISD suspension systems

研究了惯质系数的变化对ISD(Inerter-Spring-Damper)悬架系统偏频与主频的影响及其作用规律。基于惯容器、弹簧和阻尼3个元件的排列组合和被动机械元件工作特点,列出10种可行的车辆ISD悬架;依据它们的无阻尼阻抗,将它们分类为4种类型的无阻尼悬架;对其中3类含惯容器的悬架进行深入分析,发现惯容器质量阻抗的引入和新型机械网络拓扑特性的影响,使得不同类型的悬架系统具有显著的偏频和主频的个数差异。仿真结果表明:提高惯质系数可有效降低各类悬架偏频与主频,使得主频脱离垂直方向人体最敏感的频率范围。同时可以发现随惯质系数的增大,惯质系数对偏频和主频的影响程度不断减小。

The influences of inertial mass coefficient on partial frequency and dominant frequency of inerter-spring-damper(ISD)suspension systems were studied.10 effective ISD suspensions were presented based on different permutations and combinations of inerter,spring and damper,and working features of passive mechanical components.These ISD suspensions were classified into four types of undamped suspensions according to their undamped impedances.3 types of undamped suspensions containing an inerter were studied.It was found that partial frequency and dominant frequency numbers of these 3 types of undamped suspensions are obviously different due to effects of inerter mass impedance and new mechanical network’s topological characteristics.Simulation results indicated that partial frequency and dominant frequency of various suspensions can be reduced with increase in inertial mass coefficient to make their dominant frequencies be away from the most sensitive frequency range of human body in the vertical direction;furthermore,influences of inertial mass coefficient on partial frequency and dominant frequency of suspensions gradually decrease with increase in inertial mass coefficient.