ANALYZER, ANALYSIS METHOD AND ANALYSIS PROGRAM

PROBLEM TO BE SOLVED: To build an inherent strain method that realizes establishment of database handling technique in multilayer welding.SOLUTION: An analyzer 20A is a device for analyzing angle deformation volume and residual stress after welding a multilayer welded structure, and comprises: an inherent strain derivation part 24 that extracts information for an inherent strain value corresponding to welding conditions to be input, from an inherent strain DB 11 for storing the information for the inherent strain value associated with the welding conditions, and derives the inherent strain value caused in the welded structure; an elasticity analysis part 26 that calculates elasticity on the basis of a finite element method; an inherent strain conversion part 25 that derives the inherent strain value to be used for the calculation of elasticity on the basis of an arithmetic expression to be registered; and a conversion equation registration part 27 that registers the arithmetic expression in the inherent strain conversion part. The conversion equation registration part determines the arithmetic expression on the basis of a relationship between the inherent strain value to be derived by the inherent strain derivation part and the inherent strain value of the welded structure to be obtained by the elasticity analysis part as a result of the calculation of elasticity.