基于闭环形式的车辆减振器热学特性研究  

Research on Thermal Properties of Vehicle Damper Based on Closed-loop Form

作　　者：么鸣涛[1,2] 龙凯[3] 贺李平[4] 

机构地区：[1]中国航天科工集团公司第四研究院,北京100854 [2]北京理工大学机械与车辆学院,北京100081 [3]华北电力大学新能源电力系统国家重点实验室,北京102206 [4]中国航天科工集团公司北京无线电测量研究所,北京100854

出　　处：《中国公路学报》2012年第4期153-158,共6页China Journal of Highway and Transport

基　　金：新能源电力系统国家重点实验室开放基金项目(NVHSKL-201105);中央高校基本科研业务费专项资金项目(11QG22)

摘　　要：为了解决某车辆被动悬架系统中减振器由于温升过高而漏油失效的问题,提出了车辆悬架系统机械特性与其热学特性相互耦合的模型。采用MATLAB/Simulink建立闭环正反馈系统的热-机耦合模型,并通过仿真计算得到某车辆在多种工况以及不同悬架参数条件下减振器的温升特性曲线。研究结果表明:随着路面等级的下降、车速的提高、簧上质量的增大以及悬架刚度的减小,减振器的温度升高;车轮刚度对减振器温升特性影响较小;簧下质量对减振器温升特性无影响。In order to solve the problem that damper temperature increases excessively high in passive vehicle suspension system, which will lead to oil leakage and finally cause the damper invalidation, a comprehensive model for mechanical behaviors of the vehicle suspension system coupled with its thermal properties was proposed. A thermo-mechanical coupling model which reflected the closed-loop positive feedback system was established by using MATLAB/Simulink, and some curves of damper temperature rising were obtained by simulation computation in several operating modes and with different suspension parameters. The research results show that with the decline of road class, the increase of vehicle velocity, the increase of sprung mass and the decrease of suspension stiffness, the damper temperature will increase. Road wheel stiffness has little effect and unsprung mass has no effect on the damper temperature rising.

关 键 词：汽车工程 减振器 仿真 闭环 温升 

分 类 号：U463.33[机械工程—车辆工程]