Equipment thermal stress field efficient detection method based on multi-parameter coupling

Abstract

The invention discloses an equipment thermal stress field efficient detection method based on multi-parameter coupling, and the method comprises the following steps: S1, selecting N temperature sampling points on the surface of detected equipment, setting a guess value Pi of a thermal boundary condition P, wherein i is an iteration coefficient; S2, establishing a temperature/thermal stress semi-analytical solution model of the equipment according to the guess value Pi of the thermal boundary condition P; S3, establishing a constraint dispersion fuzzy reasoning model according to the temperature/thermal stress semi-analytical solution model of the equipment, and obtaining a constrained thermal boundary condition P and other to-be-inverted parameters; S4, according to the constrained thermal boundary condition P and other solved to-be-inverted parameters, reconstructing a temperature field mathematical model and a thermal stress field mathematical model of the equipment; and S5, calculating the thermal stress of the equipment according to the reconstructed mathematical models of the temperature field and the thermal stress field. The method optimizes the inversion algorithm, improves the calculation efficiency, and can achieve the real-time monitoring of the thermal stress of the equipment.

Description

technical field [0001] The invention relates to the technical field of equipment thermal stress detection, in particular to an efficient detection method for equipment thermal stress field based on multi-parameter coupling. Background technique [0002] Thermal stress is a non-negligible part of the stress on high-temperature equipment. During the start-up and stop of large-scale high-temperature pressure vessels and the process of large-scale load fluctuations, high-temperature pressure vessels will produce low-cycle fatigue loss due to alternating thermal stress. The material will creep and its performance will decrease, seriously affecting production safety. It has been in a continuous operation environment of high temperature, high pressure and high corrosion for a long time, which has inherent dangers. At the same time, its medium is mostly flammable, explosive, toxic Toxic substances greatly increase the probability of pressure vessel failure. Once an injury accident o...

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Problems solved by technology

[0005] The present invention intends to provide a high-efficiency detection method for the thermal stress field of equipment based on multi-parameter coupling, so as to solve the problem that the existing detection method adopts a single physical field, and there are deficiencies in the inversion process, and the obtained inversion results are unstable

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