导管架非节点有限元简化疲劳分析方法
Simplified FEM Fatigue Analysis Method for Non-tubular Joint of Jacket Platform
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- DOI:
- 作者:
- 包清华, 冯珩
BAO Qing-hua, FENG Heng
- 作者单位:
- 中国石油集团海洋工程有限公司工程设计院, 北京 100028
China National Petroleum Offshore Engineering Co., Ltd., Beijing 100028, China
- 关键词:
- 海上导管架;裙桩套筒;有限元;疲劳评估
offshore jacket;skirt pile sleeve;EFM;fatigue assessment
- 摘要:
- 文章以一座已投入使用的导管架平台裙桩套筒的设计为例,详细介绍了复杂非管节点裙装套筒结构的简化疲劳分析方法:首先采用SACS程序对导管架平台在波浪荷载作用下进行结构整体分析,选取简化有限元疲劳分析中所需的荷载工况组、荷载和边界条件,然后应用ALGOR程序建立裙桩套筒的有限元模型,施加荷载和边界条件,并对应力分析输出结果进行后处理得到疲劳分析结果。这种简化疲劳分析方法及其分析结果得到了挪威船级社(DNV)的认可,对导管架平台非管节点,特别是对适度水深和深水导管架的裙桩套筒的疲劳设计具有参考意义。
Taking an in-service jacket platform as an example, this paper studies the simplified fatigue analysis method for the skirt pile sleeve （which is a complex non-tubular joint structure） of a jacket platform subjected to wave load. SACS software was used for global structural analysis for the jacket platform under multi-directional wave loads, the load case set and loads and boundary conditions needed in the simplified FEM fatigue analysis were chosen, then ALGOR software was used to build a finite element model and perform finite element analysis. After stress output post-processing, the fatigue analysis results were obtained. This simplified fatigue analysis method and its analytical results were recognized by DNV, that means the simplified fatigue analysis method is effective and can be used in fatigue design for the non-tubular joint structure of an offshore jacket.2011,S1(S1): 38-41 收稿日期：2011-8-10分类号：TE951作者简介：包清华（1973- ），男，重庆人，工程师，1998年毕业于天津大学，现从事海洋工程结构设计和研究工作。参考文献：
[1] DNV RP -C203, Fatigue Strength Analysis of Offshore Steel Structures[S].
[2] API RP 2A-WSD (2002), Recommended Practice for Planning,Desi gningandCastructingFixedPlatforms——WorkingStressDesign[S].
[3] 苏翼林.材料力学[M].北京:高等教育出版社,1998.