管路参数对重载车辆悬挂系统动态性能影响研究  

Study on the Influence of Pipeline Parameters on the Dynamic Performance of Heavy Load Vehicle Suspension System

作　　者：侯友山[1] 何军[1] 曹宇[1] HOU Youshan;HE Jun;CAO Yu(Chinese North Vehicle Research Institute,Beijing 100072,China)

机构地区：[1]中国北方车辆研究所,北京100072

出　　处：《车辆与动力技术》2020年第1期6-9,48,共5页Vehicle & Power Technology

摘　　要：以某重载车辆悬挂系统为研究对象,基于功率键合图-方块图方法建立了悬挂油缸、管路及蓄能器的数学模型,并借助于Matlab/Simulink建立了仿真模型.重点就不同液压管路管径、不同工作频率对悬挂系统性能的影响进行了仿真分析并进行了样车试验对比验证.结果表明:液压管路中液体特有的惯性效应、流动阻力损失等因素对悬挂系统性能影响很大.对于外置蓄能器油气悬挂系统,管径由原有的16 mm增至30 mm后,整车垂向加速度均方根值降低50%,不同液压管路管径的选取直接影响整车行驶平顺性;工作频率越高,液压管路管径对系统动态性能的影响越大.Taking the hydro-pneumatic suspension system of a heavy load vehicle as the research object,the mathematical models of the suspension cylinder,pipeline and accumulator were established based on the method of power bond graph-block diagram,and the simulation model was established by means of MATLAB/SIMULINK.In this paper,and the influence of different hydraulic pipe diameters and working frequencies on the performance of the suspension system are analyzed by simulation and verified by actual vehicle tests.The results show that the inertia effect and flow resistance loss of the liquid in the hydraulic pipeline have a great influence on the performance of the suspension system.For the hydro-pneumatic suspension system with external accumulator,after the pipe diameter is increased from the original 16mm to 30mm,the root mean square of the vertical acceleration of the vehicle is reduced by 50%.the selection of different hydraulic pipe diameters directly affects the ride comfort of the whole vehicle.The higher the working frequency is,the greater the influence of the hydraulic pipe diameter on the dynamic performance of the system is.

关 键 词：油气悬挂系统 液压管路 键合图 行驶平顺性 

分 类 号：U461.4[机械工程—车辆工程] U463.334.3[交通运输工程—载运工具运用工程]