大型C型独立液货罐Y型接头疲劳强度评估  

Fatigue Strength Assessment Methodology for Y Joints of Type C Independent Cargo Tanks

作　　者：洪英[1] 吴剑国[2,3] 沈秋彬 朱彦彦 牛松[1] HONG Ying;WU Jianguo;SHEN Qiubin;ZHU Yanyan;NIU Song(Rules and Technology Center,CCS,Shanghai 200135,China;College of Architectural ＆ Civil Engineering,Zhejiang University of Technology,Hangzhou 310014,China;Hangzhou Hong-Nen Ship Design Co.,Ltd.,Hangzhou 310014,China)

机构地区：[1]中国船级社规范与技术中心,上海200135 [2]浙江工业大学建筑工程学院,杭州310014 [3]杭州弘能船舶设计有限公司,杭州310014

出　　处：《船舶工程》2018年第8期25-29,共5页Ship Engineering

摘　　要：围绕大型C型独立液货罐Y型接头疲劳强度评估方法的规范技术要求及制定开展研究,包括C型独立液货罐疲劳损伤计算工况的择取、液货内部动压力计算公式推导、蒸气压力和温度变化等低周疲劳载荷模式的确定,提出一整套基于热点应力的C型独立液货罐Y型接头疲劳损伤评估方法的规范实施要求。进一步地,还推导出基于一般实际情况假设下的C型独立液货罐Y型接头疲劳评估筛分准则,并对双体和三体罐Y型接头疲劳评估和筛分准则进行应用和验证。The technical requirements and formulation of the fatigue strength evaluation method for the large type C independent tanker Y joints are studied, including the selection of the fatigue damage calculation condition of the type C independent tank, the calculation formula of the internal dynamic pressure of the liquid cargo, and the steam. The determination of the low-cycle fatigue load mode such as pressure and temperature changes proposes a set of specifications for the implementation of the type C independent tank Y joint fatigue damage assessment method based on hot spot stress. Further, the type C independent tank Y joint fatigue evaluation screening criteria based on the general assumptions are derived, and the fatigue evaluation and screening criteria of the two-body and three-body tank Y joints are applied and verified.

关 键 词：独立液货罐 Y型接头 疲劳载荷 热点应力 疲劳筛分 

分 类 号：U661.43[交通运输工程—船舶及航道工程]