Inherent strain method is a commonly used welding numerical simulation method

which has a small amount of calculation and is suitable for large structures with multiple welding seams. The use of Abaqus to realize the intrinsic strain method requires the operator to have a strong software appli-cation ability. The operation of building a simulation model for a large structure with many welding seams is very large

and it involves a lot of repeated operations

which takes a lot of time.This paper designs a plug-in for welding numerical simulation modeling using inherent strain method in Abaqus platform. The plug-in uses the analytical calculation method to obtain the inherent strain values

divides the weld area and applies the inherent strain

completes the model

and establishes the sim-ulation job. The plug-in simplifies the modeling process and lowers the threshold of software using. The reliability of the calculation results meets the requirements of engineering application and can be used in the actual structural design and evaluation.