文献类型：期刊文献

英文题名：Shakedown, ratchet analyses and reliability assessment of defective pipeline with inner slots

作者：Wei, Chenfei[1];Wang, Xiaoxiao[1];Chen, Haofeng[1,2,3];Xuan, Fuzhen[1];Jia, Guodong[4]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Pressure Syst & Safety, DOE, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Southwest Petr Univ, Sch Mechatron Engn, Chengdu 610500, Peoples R China;[3]Shanghai Inst Aircraft Mech & Control, 130 Meilong Rd, Shanghai 200237, Peoples R China;[4]China Special Equipment Inspect & Res Inst, 2 Bldg,Xiyuan,Heping Rd, Beijing 100000, Peoples R China

年份：2025

卷号：319

外文期刊名：OCEAN ENGINEERING

收录：;EI(收录号：20250117634972);WOS:【SCI-EXPANDED(收录号:WOS:001402496000001)】；

基金：The authors are grateful for the supports provided by the National Key R & D Program of China (2023YFF0614903) and the Shanghai Gaofeng Project for University Academic Program Development. The paper is also sponsored by the National Natural Science Foundation of China (52375145 and 52321002) and the China Postdoctoral Science Foundation (2023TQ0119 and GZC20240467) .

语种：英文

外文关键词：Defective pipeline; Linear matching method; Shakedown analysis; Ratchet analysis; Reliability assessment

摘要：Pipelines usually work in harsh environments with the pipe surfaces eroded or corroded by fluid substance transported under the ocean and a variety of defects may appear on both the surfaces of pipelines. Ensuring pipelines do not fail under such extreme conditions is an essential aspect of ocean engineering. In this study, the shakedown limit, ratchet limit, and plastic collapse limit of the defective pipeline with inner slots under cyclic thermo-mechanical load are plotted within Bree diagrams. In addition, the effects of the slot shapes on the shakedown limit, ratchet limit, and plastic collapse limit are examined, and the maximum plastic strain range regarding different loads and slot shapes is evaluated to determine the failure mechanism. Besides, due to the uncertainty possibly existing in the actual industrial production, the probabilistic analysis based on the probabilistic Linear Matching Method (pLMM) framework is conducted to reveal the influences of uncertainties in defective pipelines. The sensitivity of the limit load multiplier to uncertain parameters, the surrogate model, and reliability-based assessment curves of the defective pipeline carried out in this paper can facilitate the limit load estimation of defective pipelines set in ocean engineering.