行程相关变阻尼油压减振器的阻尼特性分析

Damping Features Analysis of Stroke-related Variable Damping Hydraulic Shock Absorber

根据行程相关变阻尼油压减振器的基本结构、工作原理和阀系特点,利用弹性力学的基本理论推导出了环形弹性阀片受均布载荷时的挠曲变形解析式,基于上述解析式在多领域系统仿真分析软件AMESim中建立了行程相关变阻尼油压减振器的仿真模型,并利用该仿真模型分析了减振器结构参数与阀系参数对阻尼特性的影响。结果表明:旁通节流槽等效节流面积对软特性区的拉伸阻尼力和压缩阻尼力都有影响,但对拉伸阻尼力的影响程度更为明显;复原阀等效厚度增加,减振器在软、硬特性区的拉伸阻尼力都增大,但对压缩阻尼力基本无影响;流通阀等效厚度增加,减振器在软、硬特性区的压缩阻尼力都增大,但对拉伸阻尼力基本无影响。

According to the basic structure,working principle and valve system characteristics of stroke-related variable damping hydraulic shock absorber,the analytic expression of flexural deformation of annular valve plates under uniformly distributed load was deduced using the basic theory of elastic mechanics.The simulation model of stroke-related variable damping hydraulic shock absorber was established in the multidisciplinary system simulation software AMESim based on the above analytic expression.And the influence of the structure parameters and the valves parameters on damping features was analyzed using the simulation model.The results show that the equivalent area of bypass throttling groove has influence both on tension and compression damping force of the soft damping characteristic zone,but the influence on tension damping force is more obvious.The equivalent thickness of the recovery valve is increased,the tension damping force of the soft and hard damping characteristic zone is increased,but basically has no influence on compression damping force.The equivalent thickness of the flow valve is increased,compression damping force of the soft and hard damping characteristic zone is increased,but basically has no influence on tension damping force.