Computing method of circumferential stress of annular sandwich valve plates of vibration absorber under non-uniform pressure

Abstract

The invention relates to a computing method of circumferential stress of annular sandwich valve plates of a vibration absorber under non-uniform pressure, and belongs to the technical field of vibration absorbers. The method is characterized by comprising the steps that equivalent thicknesses and thickness ratio coefficients of the annular sandwich valve plates of the vibration absorber are determined according to the thicknesses and the number of the sandwich valve plates; circumferential stress coefficients of the annular sandwich valve plates of the vibration absorber under the non-uniform pressure are solved according to structural parameters, material characteristic parameters and valve port position radiuses of the sandwich valve plates; and the circumferential stress of the annular sandwich valve plates of the vibration absorber in any radius position under the non-uniform pressure is computed. Results of instance computation and ANSYS simulation verification prove that the computing method is correct; an accurate computing method for the circumferential stress of the annular sandwich valve plates under the non-uniform pressure is provided for actual design and intensity check of the vibration absorber and the sandwich valve plates, so that the design level, the quality and the performance of the vibration absorber can be raised and improved; the service life of the vibration absorber can be prolonged; and the design and testing cost of the vibration absorber can be lowered.

Description

technical field [0001] The invention relates to a shock absorber, in particular to a method for calculating the circumferential stress of an annular superimposed valve plate of the shock absorber under non-uniform pressure. Background technique [0002] Most shock absorbers use superimposed annular valve plates, and due to the existence of normally open orifices and throttle gaps in the shock absorber, the actual pressure on the annular superimposed valve plates of the shock absorber is non-uniform. The life of the vibrator, wherein the hoop stress will cause the valve plate to fracture along the radial direction. Therefore, the accurate calculation of the circumferential stress of the annular superimposed valve plate determines the split design and strength check of the annular superimposed valve plate of the shock absorber, and determines whether the modern CAD design of the automobile shock absorber and the superimposed valve plate can be truly realized. Although many sc...

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Problems solved by technology

Although many scholars at home and abroad have done a lot of research on this, most of them previously calculated the stress of a single annular valve plate under uniform pressure. However, for the shock absorber annular stacked valve plate under non-uniform pressure For the calculation of circumferential stress, no accurate analytical calculation formula and calculation method have been given so far. Most of them use finite element simulation software to conduct numerical simulation on the valve plate under a given pressure by establishing a solid model, although relatively reliable simulation can be obtained. As a result, it cannot provide accurate analytical calculation formulas and calculation methods, so it cannot meet the requirements of modern CAD design and strength check of shock absorbers and superimposed valve plates

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