A Review on Fatigue Analysis of Offshore Structures and Development of a Computer Program

J. Ocean Eng. Technol. 1996;10(2):13-19.

해양구조물의 피로해석기법에 대한 검토 및 전산프로그램의 개발

이현엽

홍익대학교 조선해양공학과

Keywords: Fatigue, Offshore Structure, Probability of Fatigue Failure, Computer Program

핵심용어: 피로, 해양구조물, 피로파괴확률, 전산프로그램

Abstract

For fatigue analsis of offshore structures, existing methods have been reviewed and a computer code has been developed on PC. As methods to estimate the probabillity distribution of the fatigue stress, three methods(the deterministic method, the stochastic method, and the simplified method) are used in this code, to choose the appropriate method according to the situations. This code estimates damage ratios, fatigue lives, and probabilities of fatigue failure considering scatterness of SN-data, based on linear damage rule and SN-curves. Also, allowable stress for the design extreme wave can calculated by the simplified method.