冰区平台的三级疲劳评估  

Three-Level Fatigue Assessment for Offshore Platforms in Ice Region

作　　者：陈国明[1] 黄东升[1] 杨晓刚[2] 伊才颖 

机构地区：[1]石油大学(华东),山东东营257061 [2]海洋石油工程股份有限公司,天津塘沽300452

出　　处：《中国海上油气（工程）》2002年第1期10-14,共5页China Offshore Oil and Gas

基　　金：国家自然科学基金;中国海洋石油总公司联合资助课题(59739170;59779001)

摘　　要：针对冰区平台疲劳危险性评价的需要,提出了建立以初级评估、详细评估和可靠性评估这三级评估方法为核心的冰区平台疲劳分析与评估体系的设想,并重点介绍了初级评估(冰区平台疲劳强度校核的简化方法、单一冰厚法、静力法)、详细评估(时间域法和谱分析法)和可靠性评估的应用流程,还给出了详细评估的一个计算实例,供工程设计参考。A new fatigue analysis and assessment system on offshore structures in ice region is suggested to be applied to fatigue safetv evaluation on offshore platforms subject to ice loadings,which consists of a three-Ievel evaluation method including preliminarv assessment, detail assessment and reliability assessment. The paper presents the detailed application prpcedure of preliminary assessment (the fatigue strength check simplification method for the platforms in ice zone, single ice thickness method and statie loading method), detail assessment (time-domain method and spectrum method) and reliabilitv assessment approach. A numerical example is given to show the application of the detail assessment approach.

关 键 词：冰区平台 三级疲劳评估 海洋结构 冰荷载 寿命预测 结构可靠性 

分 类 号：P75[天文地球—海洋科学]