抗冰导管架平台疲劳可靠性优化  

OPTIMIZATION OF ICE-RESISTANT JACKET PLATFORM DESIGN BASED ON FATIGUE RELIABILITY

作　　者：刘翔[1] 李刚[1] 岳前进[1] 时忠民 

机构地区：[1]大连理工大学工业装备结构分析国家重点实验室,辽宁大连116024 [2]中国海洋石油研究中心,北京100027

出　　处：《工程力学》2010年第1期215-220,共6页Engineering Mechanics

基　　金：863计划项目(2001AA602015);国家自然科学基金项目(90815023;10721062)

摘　　要：疲劳破坏是海洋工程结构的一种主要破坏形式。对于渤海有冰边际油田,需要在满足冰激疲劳要求的同时考虑平台成本。该文建立了抗冰导管架疲劳可靠性优化模型,利用虚拟激励法并结合兼顾整体和局部的混合有限元模型,实现了复杂管节点冰激疲劳的快速高效分析,并利用对数正态格式计算冰激节点疲劳可靠性。渤海JZ20-2NW平台算例分析表明,通过优化设计可以在满足节点疲劳可靠性要求的同时降低结构重量,可以为冰区海洋平台设计提供参考。Fatigue is one of the chief damage patterns in ocean engineering. As for the marginal fields of the Bohai Gulf, the design needs to satisfy the requirements of ice-induced fatigue in view of the cost. This paper developed a method to optimize the design of ice-resistant jacket platform based on fatigue reliability. The pseudo excitation method was employed to achieve the efficient ice-induced fatigue analysis for complex tubular joints based on a mixed finite element model that can handle the global and local structural characteristics simultaneously, and then the lognormal format was used to assess the ice-induced fatigue reliability of tubular joints. Finally, a real platform JZ20-2 NW platform was used as a demonstration, and the results showed that the design optimization can provide a lighter structure satisfying the requirement of fatigue reliability, and is useful for economic ice-resistant jacket platform design.

关 键 词：疲劳可靠性 结构优化 抗冰导管架平台 冰力谱 海冰疲劳环境 

分 类 号：O346.2[理学—固体力学]