Patent ID: 7734450
Filing Date: 2010-06-08
Classification: B23K,G06F

Abstract:
1. A welding deformation computing method for computing welding deformation of an object to be welded, comprising: extracting a nonlinear region for which nonlinear analysis using FEM (Finite Element Method) should be carried out in said object to be welded, the extracting including computing displacement of said limit surface by linear analysis; computing a first reaction force from said limit surface to said nonlinear region by linear analysis; computing a second reaction force from said nonlinear region to said limit surface by nonlinear analysis based on the displacement of said limit surface computed in said computing displacement; computing a difference between said first reaction force and said second reaction force; judging whether a magnitude of the difference computed in said computing a difference is larger than a predetermined value; correcting the displacement of said limit surface specified in said specifying a limit surface based on the magnitude of the difference computed in said computing a difference when it is judged in said judging that the magnitude of said difference is larger than said predetermined value; and computing welding deformation of said nonlinear region of said object to be welded by carrying out the nonlinear analysis using FEM based on the displacement of said limit surface computed in said computing displacement when it is judged in said judging that the magnitude of said difference is not larger than said predetermined value.