考虑船体与桩腿间隙的自升式平台桩腿疲劳寿命评估  

Fatigue Life Estimation for Truss Spud Legs of Jack-up Platform Considering the Gap between the Hull and the Spud Leg

作　　者：唐友刚[1] 邵卫东[1] 李溢涵[1] 张积乐[1] 邱世欣[2] 

机构地区：[1]天津大学建筑工程学院暨港口与海洋工程教育部重点实验室,天津300072 [2]中国船级社实业公司天津分公司,天津300457

出　　处：《船舶工程》2011年第4期76-79,共4页Ship Engineering

摘　　要：以作业水深为76.2m的自升式平台为例,研究桁架式老龄自升式平台桩腿疲劳寿命的评估方法.考虑桩腿和船体之间间隙非线性接触建立整体有限元模型,针对桁架式桩腿弦杆截面为非圆柱截面的特点,提出了其水动力计算和结构应力计算的有效方法.采用有限元方法计算各疲劳子工况下的动力响应,确定应力传递函数及相应的应力谱,预报平台桩腿的疲劳寿命.Based on the Jack-up platform which working condition depth of water is 76.2m as an example, this paper studies the method of estimating the fatigue life for truss spud legs of old-age Jack-up. The FEM model of Jack-up platform is set up considering the gap between the hull and the spud leg. The effective way for calculating the hydrodynamic force and the structure stress is proposed for no-cylinder cross-section of chord. The dynamic responses are calculated under varies fatigue conditions by the FEM method, and the stress transfer function and its stress spectrum are determined. The fatigue life of the spud leg is predicted.

关 键 词：自升式平台 桩腿 间隙非线性 疲劳寿命 

分 类 号：TE52[石油与天然气工程—油气田开发工程] U674.381[交通运输工程—船舶及航道工程]