双筒液力减振器示功特性影响因素及其敏感性分析

Analysis on Sensitivity and Influencing Factors of Force-displacement Characteristics of Dual-cylinder Hydraulic Shock Absorbers

以双筒式液力减振器为研究对象,通过分析其工作原理及结构特征,运用AMEsim仿真平台建立减振器一维仿真模型。以某型国产车用减振器的结构参数为例进行了仿真,结合减振器台架性能试验进行多个工况下的模型验证。结果表明运用AMESim所搭建的仿真模型能较好地描述车用液力减振器的真实工作情况。运用该仿真模型可以较为全面地研究覆盖节流阀片刚度、节流孔面积和充气压力等25个减振器常规设计参数在多个典型运动工况下对示功特性的敏感性大小及变化趋势。为普通双筒式液力减振器的开发及改进提供了清晰的思路和方向。

The working principle and structure characteristics of dual-cylinder hydraulic shock absorbers are analyzed.A one dimensional（1 D） simulation model for the absorbers is built by using the software AMEsim. The structural parameters of a domestic hydraulic shock absorber are employed for the simulation of the model under different working conditions. Results of the simulation are verified by the performance test of the absorber. It is shown that the 1 D model of the hydraulic shock absorber based on AMESim software can well simulate the real working condition of the hydraulic absorbers. This model can be used to analyze the sensitivity of 25 conventional design parameters, including the stiffness of the throttle valve tongue, throttle orifice area, inflation pressure etc., to the force-displacement characteristics of the shock absorbers and the variation tendency of the 25 parameters under some typical working conditions. This study may provide an effective basis for research and development of common dual cylinder hydraulic shock absorbers.