Method for Predicting Welding Deformation of Radar Large Structural Parts

Abstract

The invention relates to a method for predicting welding deformation of a large radar structural part. The method comprises the steps of adopting a large radar structural part welding process to select an appropriate welding experiment board and a strain piece and adopting a blind hole method to extract the deformation amount in the welding process; performing modeling and grid dividing on the experiment board and the large structural part; adopting a thermo-elastic finite element method to preliminarily determine the welding deformation amount of a test part, comparing the welding deformation amount with a measured value and enabling an error to be smaller than 15% according to the fine adjustment boundary condition and the clamping condition; adopting an inherent strain method to directly load the deformation amount obtained through experiment board calculation to the welding deformation calculation of the large structural part, and finishing prediction on the welding deformation of the large structural part. The method adopts a small amount of process tests and combines with the inherent strain method to achieve quantitative prediction on the welding deformation of the large radar structural part and deformation trend analysis, the test cost of the large structural part welding process is reduced, the test working amount and the analog calculation amount are decreased, and the method has guiding significance on radar welding production.

Description

technical field [0001] The invention belongs to the technical field of welding technology, and in particular relates to a method for predicting the welding deformation of large-scale radar structural parts by using numerical simulation technology. Background technique [0002] Due to the large size, complex structure and dense welds of the large radar structural parts, the deformation of the structural parts during the welding forming process is large, which seriously affects the overall performance of the radar. Therefore, measures must be taken to reduce welding deformation during the welding forming process. In general, technicians explore suitable welding processes by making small models of structural parts and then welding them. This method not only has a large workload, a long period and high cost, but also the welding process for small models is generally difficult to meet the welding requirements of large structural parts. In recent years, with the development of co...

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Problems solved by technology

[0003] In order to further accurately predict the welding deformation trend and deformation amount of large-scale structural parts, and solve the problem of high cost of welding deformation control in the prior art, the present invention proposes a method for predicting the welding deformation of large-scale structural parts of radar

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