Method for calculating peripheral stress of non-equal structure superposed valve plates of vehicle shock absorber

Abstract

The invention relates to a method for calculating the peripheral stress of non-equal structure superposed valve plates of a vehicle shock absorber and belongs to the technical field of the shock absorber. The method is characterized in that according to the thickness, number, inner circle radius and outer circle radius of the superposed valve plates, the outer radius unequal rate factor, the equivalent thickness, the equal thickness, and the thickness proportionality factor of each superposed valve plate are determined; according to structure parameters and material characteristic parameters of the first superposed valve plate, the peripheral stress factor of the non-equal structure superposed valve plates is calculated, so that the peripheral stress of the non-equal structure superposed valve plates at any radius under uniform pressure is calculated. Illustration calculation and ANSYS simulation verification show that the calculating method is correct, a reliable peripheral stress calculating method is provided to the detaching design and stress strength verification of the non-equal structure superposed valve plates of the vehicle shock absorber, the design level, the quality and the performance of the shock absorber can be improved, the design and experiment cost and the production cost are reduced, and on the premise that characteristic design requirements are met, the design requirement on the stress strength of the valve plates is met.

Description

technical field [0001] The invention relates to a shock absorber, in particular to a method for calculating the circumferential stress of an anisostructural superimposed valve plate of an automobile shock absorber. Background technique [0002] Most hydraulic shock absorbers use isostructural superimposed valve plates, that is, superimposed valve plates with equal inner circle radius and outer circle radius. The superimposed valve plates with equal circle radii and unequal outer circle radii meet the design requirements of the stress intensity of the superimposed valve plates on the premise of meeting the design requirements of the shock absorber characteristics. The maximum limit gap gasket can be avoided, the production cost of the shock absorber can be reduced, and the utility model has remarkable economic and social benefits. However, in order to realize the split design and strength check of the non-isostructural superimposed valve plate of the automobile shock absorbe...

AI Technical Summary

Problems solved by technology

However, in order to realize the split design and strength check of the non-isostructural superimposed valve plate of the automobile shock absorber, the problem of the circumferential stress of the non-isostructural superimposed valve plate must be solved first, including the circumferential stress, radial stress and composite stress. Calculation, among them, the circumferential stress will cause the valve plate to fracture and damage along the radial direction of the valve plate

Although a lot of research has been done on the calculation of the stress calculation of the superimposed valve plate of the shock absorber, it is only studied on the superimposed valve plate of the isostructure. For example, Shandong University of Technology has given the calculation method of the superimposed valve plate stress of the shock absorber. At present, there is no simple and reliable calculation method for the calculation of the circumferential stress of non-isostructural superimposed valve plates at home and abroad. Most of them can only use ANSYS finite element simulation software to establish a solid simulation model of non-isostructural superimposed valve plates. , the numerical simulation of the circumferential stress is carried out, and the approximate value of the circumferential stress is obtained

Since the finite element simulation software cannot give the calculation formula, it cannot meet the requirements of the actual design and strength check of the automobile shock absorber and superimposed valve plate

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