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

Abstract

The invention relates to a method for calculating the composite 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 inner radius, outer radius, thickness and number of the non-equal structure 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, the composite stress factor of the non-equal structure superposed valve plates is calculated, so that the composite stress of each non-equal structure superposed valve plate at any radius under uniform pressure is calculated. Comparison with an ANSYS simulation verification result shows that the calculating method is correct, a reliable composite stress calculating method is provided to the detaching design and 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, on the premise that characteristic design requirements are met, the design requirement on the stress strength of the valve plates is met, and the design and experiment cost and the production cost are reduced.

Description

technical field [0001] The invention relates to an automobile hydraulic shock absorber, in particular to a calculation method for the composite stress of non-isostructural superimposed valve plates of the automobile shock absorber. Background technique [0002] In order to meet the characteristics of the shock absorber and the stress intensity of the valve plate, the actual automobile shock absorber often uses multiple non-isostructural superimposed valve plates, that is, the superimposed valve plates with the same inner circle radius and different outer circle radius. Non-isostructural stacked valve plates can avoid the use of "gap limit washers", so the production cost can be reduced, and it has significant economic and social benefits. In order to truly realize the split design and strength check of non-isostructural superimposed valve plates of automobile shock absorbers, it is necessary to solve the problem of composite stress calculation of non-isostructural superimpos...

AI Technical Summary

Problems solved by technology

Although our country has done a lot of research and made breakthroughs in the calculation of the stress calculation of the superimposed valve plate of the shock absorber, for example, Shandong University of Technology once studied the superimposed valve plate of the isostructure, and gave the composite stress of the superimposed valve plate of the shock absorber. However, for the calculation of the composite stress of non-isostructural superimposed valve plates, there is no simple and reliable calculation method at home and abroad. Most of them can only use ANSYS finite element simulation software to establish non-isostructural superimposed valves The solid simulation model of the sheet, and the numerical simulation calculation of the composite stress

Although a reliable value solution can be obtained by using finite element simulation software, because the finite element simulation software cannot give calculation formulas, it cannot meet the requirements of modern CAD design and strength check of automobile shock absorbers and superimposed valve plates

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