半潜平台疲劳热点应力长期分布参数研究  

Research on long-term distribution parameters of fatigue hotspots stress for a semi-submersible platform

作　　者：陈锋[1,2] 刘俊[1,2] 薛鸿祥[1,2] 唐文勇[1,2] 

机构地区：[1]海洋工程国家重点实验室(上海交通大学),上海200240 [2]高新船舶与深海开发装备协同创新中心,上海200240

出　　处：《海洋工程》2016年第4期80-84,共5页The Ocean Engineering

摘　　要：明确热点应力长期Weibull分布的参数是船舶与海洋工程结构应用疲劳简化分析方法的关键之一。以某深水半潜式平台为研究对象,通过整体结构有限元计算得到热点应力传递函数,结合波浪散布图计算热点应力长期分布概率函数,采用最小二乘法对热点应力长期Weibull分布进行参数估计。研究结果可为疲劳简化分析方法在半潜平台上的应用提供参考。Establishing parameters of Weibull distribution is the key of simplified fatigue assessment. In studying a semi-submersible platform,stress transfer function was extracted through the whole structure FEM calculation,long-term distribution of hotspots stress was calculated based on wave scatter diagram,and parameters of Weibull distribution were estimated by least square method.Simplified fatigue assessment on semi-submersible platform can benefit from our results.

关 键 词：半潜平台 疲劳简化分析 热点应力 WEIBULL分布 

分 类 号：P751[交通运输工程—港口、海岸及近海工程]