Numerical analysis of welding deformation for large-scale structure

Abstract

In recent years, it has been possible to predict the welding deformation by only performing elastic analysis using inherent strain. In elastic analysis with inherent strain, Static implicit FEM is generally used. In Static implicit FEM, huge computing resources are necessary to predict the welding deformation of the large scale structure and it is very difficult to analyze. Therefore, in order to achieve shorter computing time and lower memory consumption, the authors developed a new analysis method using inherent strain based on Idealized explicit FEM. The developed method is applied to the welding deformation analysis of the fundamental welding structure to verify the validity of proposed method. As a result, it is found that the developed method has almost the same accuracy as Static implicit FEM. In addition, the developed method can analyze the problem of 571,176 degrees of freedom 4 times smaller in computing time and 10 times less in memory consumption than Static implicit FEM. Thus, it can be concluded that the developed method is very effective method in the welding deformation analysis of large scale structure.