张力腿平台系索疲劳可靠性研究  

Fatigue Reliability of Tension Leg Platform Tendons

作　　者：鲍莹斌[1] 李润培[1] 顾永宁[1] 

机构地区：[1]上海交通大学船舶与海洋工程学院,上海200030

出　　处：《上海交通大学学报》2000年第1期87-90,共4页Journal of Shanghai Jiaotong University

基　　金：上海市高等学校科学发展基金!(96JG 0 50 54 )

摘　　要：提出了一种解决张力腿平台系索疲劳可靠性问题的思路.假设波浪载荷的长期分布是由k个短期海况组成,且每一海况中的应力范围的短期分布服从Rayleigh分布.利用整个张力腿平台动力响应分析以及系索有限元应力分析得到系索结构的应力谱,采用两种方法对张力腿平台系索疲劳可靠性进行了研究.首先,采用Miner线性累积损伤模型,并考虑了平均应力的影响以及进行了雨流修正,对系索结构进行了疲劳可靠性分析;随后,建立了疲劳裂纹扩展随机变量模型,利用Paris公式对系索结构进行疲劳可靠性研究.In the tendon, fatigue is an important failure mode. This paper presented an efficient probabilistic procedure for estimating the fatigue reliability of the tension leg platform (TLP) tendon. The long term stochastic load process was divided into k short term cases which are distributed as Rayleigh in the paper. The stress spectrum of the tendons was derived on the basis of the dynamic response analysis of the TLP and Finite Element (FE) stress analysis of the tendons. The fatigue reliability analysis of the tendons was carried out by using the S N curve and the Miner linear cumulative law model considering the mean stress and rain flow revision and then by establishing the fatigue crack growth rate mode and applying the Paris formula.

关 键 词：海洋工程 张力腿平台 系索 疲劳可靠性 

分 类 号：P752[天文地球—海洋科学] U656.6[交通运输工程—港口、海岸及近海工程]