Box type structure heavy deformation prediction method based on macroscopic stress and residual stress extension

Abstract

The invention discloses a box-type structure heavy deformation prediction method based on macroscopic stress and residual stress extension. The method comprises the following steps: S1, detecting residual stress of a weld joint area of a box-type structure; s2, calculating a macroscopic stress distortion region coefficient of the structure under a working condition; s3, correcting the residual stress of the weld joint area based on the distortion area coefficient; s4, calculating the residual stress topology considering the peak-valley effect of the working condition stress; and S5, calculating the heavy deformation of the box-type structure based on the extension of the macroscopic stress and the residual stress. The method is high in detection precision, and has important practical significance for realizing real-time evaluation of the heavy deformation distribution of the box-type structure.

Description

technical field [0001] The invention relates to the field of detection of heavy deformation of box structures, in particular to a prediction method of heavy deformation of box structures based on macroscopic stress and residual stress expansion. Background technique [0002] With the progress of society, more and more box-type structures are applied to large-scale construction machinery structures, and the problem of secondary deformation during use has attracted more and more attention from the society. Under such a background, it is necessary and urgent to predict the re-deformation of box-type structures in real time. Most detection methods for box-type structures are often based solely on macroscopic stress or residual stress, which have disadvantages such as low calculation accuracy and low detection efficiency. How to find out the key factors representing macroscopic stress and microscopic residual stress, and combine them to predict the deformation redistribution of ...

AI Technical Summary

Problems solved by technology

Most detection methods for box-type structures are often based solely on macroscopic stress or residual stress, which has the disadvantages of low calculation accuracy and low detection efficiency.

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