To provide a welding residual stress analysis method which reduces errors caused by modeling performed when temperature distributions and changes in temperature of a welded part necessary for welding residual stress analysis are found by two-dimensional heat-transfer analysis, and finds a welding residual stress with high precision by heat elastoplasticity analysis. 溶接残留応力解析に必要な溶接部の温度分布および温度変化を、2次元伝熱解析により求める際のモデル化に伴う誤差を低減させ、熱弾塑性解析により高精度で溶接残留応力を求めることが可能な溶接残留応力解析方法である。 - 特許庁