顶张力对深水刚性立管涡激振动及疲劳损伤的影响  

The Effects of Top Tension on VIV and Fatigue Damage of Deepwater Stiff-risers

作　　者：上官丽红[1] 

机构地区：[1]中国海洋大学工程学院,山东青岛266106

出　　处：《船海工程》2011年第2期111-114,118,共5页Ship & Ocean Engineering

基　　金：国家自然科学基金(50639030)

摘　　要：分析讨论顶张力对深水刚性立管在剪切流中的涡激振动响应和疲劳损伤的影响。从理论上分析张力对刚性立管固有特性的影响,并利用OrcaFlex软件建立数值模型,模拟不同顶张力系数下立管于剪切流中的涡激振动响应,同时采用S-N曲线法计算立管疲劳损伤。结果表明,顶张力对立管的影响直接体现在刚度上,立管刚度随着张力的增大而增大,因此顶张力对降低立管疲劳损伤有一定积极作用。但是随着顶张力的增大,其对降低疲劳损伤的贡献越来越小,而对立管强度储备的危害却逐渐增大。The effect of top tension on response of vortex-induced vibration（VIV） and fatigue damage of deepwater stiff-risers in a sheared flow condition was studied.The effects of top tension on the natural properties of riser was analyzed in theory,the dynamic response of VIV in sheared flow with variable top tension factor was simulated by OrcaFlex,and the S-N method was adopted to calculate fatigue damage of riser.It＇s found that the stiffness of riser is increasing with the rise in the top tension and the response of VIV and fatigue damage of riser is improved on high top tension.However,the advantage is disappearing while increase in top tension is enough,and meanwhile,the disadvantage in strength becomes obvious.

关 键 词：顶张力 深水立管 涡激振动 立管疲劳损伤 动力响应 

分 类 号：TE311.3[石油与天然气工程—油气田开发工程]