Quantitative analysis method for response characteristics of aging state of rubber O-shaped ring sealing structure

Abstract

The invention relates to a mechanical structure health monitoring method, in particular to a quantitative analysis method for response characteristics of the aging state of a rubber O-shaped ring sealing structure. The problem that an existing finite element method cannot achieve high-precision modeling and efficient solving of the aging state of a rubber O-shaped ring sealing structure is solved. According to the technical scheme, the method comprises the following steps: firstly, obtaining rubber material samples with different aging days, and evaluating the aging degree of the rubber material through a mechanical property test; then a finite element model of the rubber O-shaped ring sealing structure is established in a modeling-importing-pretreatment mode, different aging states of an equivalent model are achieved by setting different compression elasticity moduli of a rubber O-shaped ring, and different compression ratios of the rubber O-shaped ring are achieved by setting boundary conditions; and finally, through modal analysis and random vibration analysis, obtaining a change rule between the aging state and the response characteristic under different compression ratios.

Description

technical field [0001] The invention relates to a method for monitoring the health of a mechanical structure, in particular to a method for quantitatively analyzing the response characteristics of the aging state of a rubber O-ring sealing structure. Background technique [0002] Rubber has excellent elastic properties and resistance to compressive deformation, which can effectively prevent the leakage of pressure media. The rubber O-ring sealing structure is widely used in machinery and equipment in many fields such as aviation, aerospace, navigation, energy and transportation. [0003] During the long-term storage and use of mechanical equipment, due to the influence of environmental factors such as temperature, humidity, corrosion and their changes, the rubber seals inevitably experience sticky, hard, cracked or micro-cracked aging phenomena, resulting in their The physical, chemical and mechanical properties are reduced, resulting in the deterioration of the sealing perf...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing finite element method cannot realize the high-precision modeling and efficient solution of the aging state of the rubber O-ring sealing structure, the invention provides a quantitative analysis method for the response characteristics of the aging state of the rubber O-ring sealing structure

Images