浮式平台全概率谱疲劳分析方法

摘要

采用DNV开发的SESAM软件.在研究浮式平台水动力的基础上探究了浮式平台的全概率谱疲劳计算方法.以南海某海域简化的第六代深水半潜式平台为研究对象,建立“GeniE建模-Wadam波浪力载荷及水动力计算-Seatra结构应力计算-Stofat结构疲劳计算”这一系统的浮式平台全概率谱疲劳计算方法.为验证这一计算方法的合理性,计算简化的半潜式平台的疲劳寿命,为浮式平台的疲劳分析提供参考.%Based on finite element software SESAM,the total probability spectrum fatigue analysis method of floating platform is explored after studying the hydrodynamic characteristics.The simplified deepwater semi-submersible platform in the South China Sea is taken as an example,and a total probability spectrum method of analyzing the floating platform is ertablished which contains "Modeling in GeniE,Calculating wave force and RAO in Wadam,Structure analysis in Sestra and Fatigue analysis in Stofat".To verify the feasibility of the method,the fatigue of above platform is studied.The result shows that the distribution of the fatigue life is reasonable which indicates that this rrtetbod is feasible for predicting fatigue life of floating platforms.