Three-way intersecting line welding temperature field numerical simulation and prediction method and system, and medium

Abstract

The invention discloses a three-way intersecting line welding temperature field numerical simulation prediction method and system, and a medium. The method comprises the following steps: building a three-dimensional model, and carrying out grid division of the three-dimensional model, wherein the three-dimensional model comprises a three-way pipe fitting and a welding seam; establishing a heat source model for welding, and obtaining a moving track curve of the heat source model according to grid node coordinates of a welding bead in the three-dimensional model; performing simulation analysis in combination with the heat source model, the track curve, and the three-dimensional model, and obtaining temperature parameters on welding components in a welding process. According to the method and the system, simulation calculation of a temperature field in a three-way intersecting line welding process can be achieved; in addition, a welding track curve is fitted by capturing welding bead grid node coordinates, and the method can be suitable for any irregular space welding curve, so that the problem that, in the prior art, the welding track is difficult to accurately describe through a traditional geometric parameter equation, is solved; the invention can be widely applied to the field of welding numerical simulation.

Description

technical field [0001] The invention relates to the field of welding numerical simulation, in particular to a method, system and medium for numerical simulation prediction of a three-way intersecting line welding temperature field. Background technique [0002] In the field of petrochemical industry, pressure pipes are an important medium for heat and mass transfer. They are widely used, and most of the transported materials are high-temperature, flammable and explosive media. Once damaged, it will cause serious casualties and huge economic losses. During the laying process of pressure pipelines, tee fittings are often required for diversion or diversion, and there are a large number of welding problems of pipe intersecting line welds. The intersecting line weld belongs to the complex space curve welding, the process is complicated, the welding seam positioning is difficult, and the quality assurance is difficult. In addition, the welding process has the characteristics of ...

AI Technical Summary

Problems solved by technology

The intersecting line weld belongs to the complex space curve welding, the process is complex, the welding seam positioning is difficult, and it is difficult to ensure the quality

In addition, the welding process has the characteristics of high temperature, instantaneous, dynamic, etc. It is difficult to accurately obtain the changes of parameters such as temperature on the welding components during the welding process by using traditional testing methods

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