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在 ADAMS环境下 ,开发出双筒液压减振器的虚拟样机 ,并研究了减振器强非线性 .将减振器速度外特性试验曲线拟合为速度外特性不对称非线性迟滞环 ,取代了常规减振器建模中的速度外特性不对称双线性化模型 .采用实际减振器的几何参数、物理特性以及运动约束 ,经动态仿真分析表明 ,数值仿真与台架试验结果基本相符 .因此 ,该减振器虚拟样机建模是正确的 ,可为减振器优化设计和整车性能匹配改进提供开发平台
In the ADAMS environment, a virtual prototype of a double-cylinder hydraulic shock absorber is developed and the strong non-linearity of the shock absorber is studied. The test curve of the external characteristics of the shock absorber speed is fitted to an asymmetric nonlinear hysteresis loop with speed characteristics. The asymmetrical bilinear model of the speed external characteristic in the conventional shock absorber modeling is adopted.The geometric parameters, physical characteristics and motion constraints of the actual shock absorber are used.The dynamic simulation analysis shows that the numerical simulation basically agrees with the bench test results Therefore, the modeling of the virtual prototype of the shock absorber is correct, and can provide a development platform for the optimization of the shock absorber and the improvement of matching of the performance of the entire vehicle