两级阻尼可调式液压减振器的性能仿真与试验  

Performance Simulation and Testing of Two-levels-damping Adjustable Hydraulic Shock Absorber

作　　者：江浩斌[1] 胡隽秀[1] 陈龙[1] 汪若尘[1] 孙鹏[1] 

机构地区：[1]江苏大学汽车与交通工程学院,镇江212013

出　　处：《机械工程学报》2010年第22期117-122,共6页Journal of Mechanical Engineering

基　　金：浙江省重大科技专项(2006C11089);江苏大学高级人才启动(07JDG039)资助项目

摘　　要：可调阻尼减振器是汽车半主动悬架的关键部件。根据某大客车电控半主动悬架的阻尼控制要求,以该车原被动式液压减振器为基础,设计出一种具有两级阻尼特性的可调减振器。采用共轭梁法计算节流阀片的挠曲变形,建立该减振器阻尼特性的数学模型,仿真分析活塞杆直径,阻尼阀孔径以及调节孔孔径等主要结构参数对减振器阻尼性能的影响,在此基础上确定可调减振器的主要设计参数。对研制的可调减振器样件进行阻尼性能测试,结果表明:减振器的两级阻尼状态变化明显,阻尼切换控制准确,阻尼力试验值与仿真值的偏差小于8%,说明所建的减振器数学模型具有较高的精度,采用共轭粱法计算节流阀片挠曲变形是可行有效的,为设计开发可调阻尼液压减振器和研究汽车半主动悬架提供了重要依据。Adjustable shock absorber is a key part of vehicle semi-active suspension.According to the damping control demand of electric-controlled semi-active suspension of a certain bus,the structure of a two-levels-damping adjustable shock absorber is designed on the basis of the original passive hydraulic shock absorber of the bus.The deflections of shock absorber＇s valve plates are calculated by using conjugate beam method,and a mathematical model for the damping characteristics of the adjustable shock absorber is established.Main structural affection factors to shock absorber＇s damping performance such as the piston rod diameter,damping valve orifice and adjustable orifice are analyzed by simulation.Then the damping performance bench test of the adjustable shock absorber specimen is carried out for verification.The test results show that two-stage damping states of shock absorber change obviously,the switching control of damping state is precise,damping force deviations between the test results and the simulation results are less than 8%.It is verified that the established model for adjustable shock absorber has high accuracy and the conjugate beam method for calculating the deflections of shock absorber＇s valve plates is available,the research results provide important basis for designing adjustable shock absorber and studying vehicle semi-active suspension.

关 键 词：可调阻尼减振器 阀片变形 共轭梁法 性能仿真 台架试验 

分 类 号：TH703.06[机械工程—仪器科学与技术]