STEEL PIPE COLLAPSE STRENGTH PREDICTION MODEL GENERATION METHOD, STEEL PIPE COLLAPSE STRENGTH PREDICTION METHOD, STEEL PIPE MANUFACTURING CHARACTERISTICS DETERMINATION METHOD, AND STEEL PIPE MANUFACTURING METHOD

摘要

Provided are a steel pipe collapse strength prediction model generation method, a steel pipe collapse strength prediction method, a steel pipe manufacturing characteristics determination method, and a steel pipe manufacturing method that make it possible to predict, with high accuracy, collapse strength of a coated steel pipe or a steel pipe after molding of the steel pipe in consideration of pipe-manufacturing distortion during molding of the steel pipe. A steel pipe shape of a steel pipe to be predicted after molding of the steel pipe, steel pipe strength characteristics after molding of the steel pipe, and steel pipe manufacturing characteristics comprising pipe-manufacturing distortion during molding of the steel pipe are inputted to the steel pipe collapse strength prediction model generated by the steel pipe collapse strength prediction model generation method, and collapse strength of the steel pipe after molding of the steel pipe is predicted (step S1 to step S5). In addition, a steel pipe shape of a coated steel pipe to be predicted after molding of the steel pipe, steel pipe strength characteristics after molding of the steel pipe, and steel pipe manufacturing characteristics including pipe-manufacturing distortion during molding of the steel pipe and a coating condition are inputted to the steel pipe collapse strength prediction model generated by the steel pipe collapse strength prediction model generation method, and collapse strength of the coated steel pipe is predicted (step S11 to step S15).