半潜式平台全寿命期极限强度随机预报方法研究  

Stochastic prediction method of ultimate strength of semi-submersible platforms in total life cycle

作　　者：嵇春艳[1] 张赟[1] 元志明[1] 

机构地区：[1]江苏科技大学船舶与海洋工程学院,江苏镇江212003

出　　处：《江苏科技大学学报（自然科学版）》2012年第1期8-12,共5页Journal of Jiangsu University of Science and Technology:Natural Science Edition

基　　金：国家自然科学基金资助项目(51079065)

摘　　要：基于逐步破坏分析法和有限元计算方法,发展一种计及材料腐蚀、疲劳裂纹等结构损伤因素的半潜式海洋平台全寿命期极限强度计算方法,在此基础上分别考虑材料腐蚀及裂纹的随机性,建立了半潜平台结构极限强度随机统计预报方法.以一典型半潜式平台为研究对象,进行平台主体全寿命期内的动态极限强度计算,并进行统计分析,给出平台主体结构极限强度随服役年限的变化规律.Based on the progressive collapse analysis the ultimate strength of semi-submersible platforms in al damage method and finite element method, a calculation method of the total life-cycle was developed, considering the structur- including material corrosion and fatigue cracks. Furthermore, randomness of material corrosion and cracks are taken into account, and the stochastic prediction method of the ultimate strength of semi-submersible platform structure is established. Finally, as a numerical example, a typical semi-submersible platform was se- lected to illustrate the process of calculating the dynamic ultimate strength of upper hull of semi-submersible plat- form in total life cycle. The relationship of the ultimate strength of upper hull of semi-submersible platforms and the service life is given.

关 键 词：半潜式平台 腐蚀 裂纹 极限强度 

分 类 号：TE951[石油与天然气工程—石油机械设备]