基于能量法的减振器阀片变形研究

Study on Deformation of Shock Absorber Valve Based on Energy Method

根据最小势能原理,结合里兹法,分别推求了均布载荷作用下单个阀片和多个不等径叠加阀片挠曲变形的理论解析式。利用ANSYS有限元软件建立阀片变形的有限元模型,对比验证了任意半径处阀片变形解析值。结果表明:基于能量法推导的阀片变形解析式是正确的,且精度提高到0.2%以内。进一步分析阀片厚度、阀片外半径、挡环半径、叠加阀片数目等关键结构参数对变形刚度的影响规律。研究表明:阀片变形刚度随阀片厚度、挡环半径、叠片数目的增大而增大,随阀片外半径的增大而减小。该解析式及结论可为减振器的仿真、调校及优化设计提供一定的理论依据。

Based on the minimum potential energy principle and combining with the Ritz method, the theoretical model of single and multiple shim stacks were established respectively to calculate deformation value under the uniform load. ANSYS was used to establish the finite element model of valve deflection, and a comparison was made with the deformation of the analytic expression by any radius. The results show that the analysis formula of valve deformation is correct based on the energy method, and the analytical results are more accurate. The influence rules on the valve deformation stiffness of key parameters, such as the valve plate thickness, the valve plate outer radius, the retaining ring radius and the number of shim stacks, were further analyzed. The research shows that the valve deformation stiffness increases with the increase of the valve plate thickness, the retaining ring radius and the number of shim stacks, and decreases with the increase of the valve plate outer radius. The conclusions provide a certain theoretical guidance for parametric design of shock absorber.