Workpiece deformation simulation prediction method for optimizing initial residual stress based on MSVR-GA

Abstract

The invention provides a workpiece deformation simulation prediction method for optimizing initial residual stress based on MSVR-GA, and belongs to the field of mechanical engineering. According to the method, firstly, a finite element simulation model is established to predict workpiece deformation according to initial residual stress distribution obtained through actual measurement and the removal amount of upper and lower surface materials of a workpiece; then, the relation between the initial residual stress adjustment value and workpiece deformation is established through MSVR; then, according to actual workpiece deformation, an optimal initial residual stress adjustment value is searched by utilizing the GA; and finally, correcting the initial residual stress according to the adjustment value to obtain a more accurate workpiece deformation simulation prediction model. According to the method, the initial residual stress is corrected through the MSVR-GA, the stress distribution condition better matched with the actual condition can be obtained, and the precision of the workpiece deformation simulation prediction model is greatly improved.

Description

technical field [0001] The invention belongs to the field of mechanical engineering, and relates to a simulation prediction method of workpiece deformation, in particular to a simulation prediction method of workpiece deformation based on MSVR-GA optimization of initial residual stress. Background technique [0002] At present, thin-walled parts are widely used in the aerospace field, such as aircraft skins, engine blades, etc. In order to improve the performance of products, the requirements for machining accuracy of parts are getting higher and higher. However, during the forming process of the workpiece, due to the action of external force and temperature field, residual stress inevitably occurs. For thin-walled parts, when the material is removed during processing, the release of internal residual stress can easily lead to deformation of the workpiece and affect the surface shape accuracy of the part. Therefore, the residual stress is the main factor leading to the def...

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Problems solved by technology

[0005] The present invention aims at the problem that the current initial residual stress data is inaccurate, resulting in low accuracy of the simulation prediction model of workpiece deformation, and proposes a simulation prediction method of workpiece deformation based on MSVR-GA optimization of initial residual stress

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