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为了同时满足特种车辆悬架减振器阀片应力强度设计及阻尼特性精确设计的需求,须采用变厚度节流阀片,然而目前尚无精确的变厚度节流阀片应力解析计算公式,常出现阀片的断裂失效问题.根据变厚度节流阀片的力学模型,给出了阀片在均布压力作用下的变形曲面微分方程的通解.根据变厚度节流阀片变形、内力和应力之间的关系,创建了变厚度节流阀片径向、周向和复合应力解析计算式及阀片应力系数.利用ANSYS有限元软件对应力解析计算式正确性进行了仿真验证,结果表明解析计算值与仿真值吻合且相对偏差在0.8%以内.通过实例,利用应力解析计算式设计了变厚度阀片并进行了试验验证.试验结果表明,所设计的变厚度阀片同时满足了阀片应力强度与阻尼特性精确设计的要求,所建立的变厚度节流阀片应力解析计算方法是正确、可靠的,为减振器变厚度节流阀片设计和快速进行强度分析提供了有益参考.
In order to meet the requirements of the design of the stress intensity of the special vehicle suspension damper plate and the precise design of the damping characteristics, a variable thickness throttle plate is adopted. However, there is no accurate formula for calculating the stress of the variable thickness throttle plate at present. The problem of fracture failure of the valve plate appears.According to the mechanical model of variable thickness throttle valve plate, the general solution to the differential equation of the valve plate under uniform pressure is given.According to the variable thickness throttle plate deformation, internal force and stress The paper established the radial, circumferential and composite stress analysis formulas and the valve stress coefficient of the variable thickness throttle plate.The ANSYS finite element software was used to verify the correctness of the stress analysis formula, the results show that the analysis The calculated value agrees with the simulation value and the relative deviation is less than 0.8% .According to the example, the variable thickness valve plate is designed and verified by stress analysis.The experimental results show that the designed variable thickness valve plate satisfies both the valve plate Stress intensity and damping characteristics of the precise design requirements, the established variable thickness Throttle valve stress analysis method is correct and reliable, for the variable thickness damper throttle Design and rapid strength analysis provides a useful reference.