履带车辆液压减振器建模及不对称阻尼研究

Research on Modeling and Asymmetric Damping of Hydraulic Shock Absorber for Tracked Vehicles

为对高速履带车辆行走机构液压减振器建模及不对称阻尼进行研究,以某高速履带式车辆为研究对象,使用Recurdyn软件设计了共计592个自由度的履带车辆动力学模型,并建立考虑液压减振器不对称阻尼特性的AMEsim液压系统模型,两者模拟计算,结合试验数据,经分析结果基本一致。最后在不同车速、地面以及履带预张紧力情况下,分别对不对称阻尼对应的复原与压缩阀节流孔截面积之比大于、等于或小于1的情况展开计算并归纳结果,得出节流孔截面积的比值为1时,履带车辆减振性能表现最优。该研究可为高速履带车辆减振器的设计提供理论参考和方法。

In order to study the modeling and asymmetric damping of the hydraulic shock absorber of the traveling mechanism of high-speed tracked vehicle,a high-speed tracked vehicle dynamics simulation model with a total of 592 degrees of freedom has been established using RecurDyn software,and the AMESim hydraulic system model considering the asymmetric damping characteristics of the hydraulic shock absorber has been established.The results of the co-simulation are basically consistent with the experimental results.Then under different vehicle speeds,ground conditions,and track pre-tension conditions,calculations have been conducted for cases where the ratio of the orifice cross-sectional area of the recovery and compression valve orifices corresponding to asymmetric damping are greater than,equal to,or less than 1,and the results have been summarized.It has been found that when the ratio of the orifice cross-sectional area is 1,the vibration reduction performance of tracked vehicles is optimal.This study can provide theoretical references and methods for the design of shock absorbers for hi gh-speed tracked vehicles.