三轴车悬架动力学参数的匹配  

Dynamic parameter matching schemes of three-axis vehicles suspension

作　　者：孙艺珊 吴志成[1] SUN Yishan;WU Zhicheng(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)

机构地区：[1]北京理工大学机械与车辆学院,北京100081

出　　处：《江苏大学学报（自然科学版）》2018年第3期249-253,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51375046)

摘　　要：为了提高多轴车的平顺性,以三轴车为例,建立了三轴车的数学模型,分别提出3种悬架刚度匹配方案和3种阻尼系数匹配方案,由此组合出9种悬架动力学参数匹配方案.通过在不同路面输入下,对9种方案分别进行仿真分析,分析了路面输入以及动力学参数匹配方案对车辆平顺性多个指标产生的影响.在不同的路面输入和具体的设计目的下,提出了不同的悬架动力学参数匹配方案,获得了设计目的相关指标最优性能的设计方法.结果表明:在随机路面输入下,要获得最小车身加速度,悬架动力学参数匹配应采用偏频相同、阻尼比相同的方案;要获得最小车身俯仰角加速度,应采用刚度三轴相同、阻尼中间轴较大的方案.To improve the ride comfort of multi-axis vehicle,the mathematical model was established with three-axis vehicle as example.Three suspension stiffness matching schemes and three damping coefficient matching schemes were proposed to match nine suspension dynamic parameter matching schemes.Based on different road inputs,the nine schemes were simulated and analyzed.The effects of road inputs and dynamic parameter matching schemes on indexes of vehicle ride comfort were analyzed.The different dynamic parameter matching schemes were proposed to get the best index based on road inputs and design targets.The results show that for the random road input,to get the minimum body acceleration,the same frequency bias and the same damping ratio should be adopted.To obtain the minimum acceleration of the body pitch angle,a scheme with the same stiffness,the larger damping of intermediate shaft should be adopted.

关 键 词：多轴车 行驶平顺性 动力学参数分析 匹配 弹簧刚度 阻尼 

分 类 号：U463.33[机械工程—车辆工程]