Residual deformation caused by JCOE forming of submarine pipeline and its influence on pipeline collapse

被引：0
|
作者：
Xie P. [1 ,2 ]
Liu H. [1 ]
Chang J.-T. [1 ]
机构：
[1] Sun Yat-sen University, Zhuhai
[2] Southern Laboratory of Ocean Science and Engineering (Zhuhai), Zhuhai
来源：
Chuan Bo Li Xue/Journal of Ship Mechanics | 2022年 / 26卷 / 09期
关键词：
Crushing; JCOE process; Numerical simulation; Process parameter; Submarine pipeline;
D O I：
10.3969/j.issn.1007-7294.2022.09.011
中图分类号：
学科分类号：
摘要：
Large diameter submarine pipelines are prone to collapse due to huge sea water pressure during installation and service. This instability resistance is affected by the local geometric deviation and residual stress resulting from the pipeline manufacturing process. Based on the plastic theory and numerical simulation method, a "prebending-forming-expanding" integrated model for a large diameter submarine pipeline was established. The key mechanical parameters such as residual stress, residual deformation and forming force caused by JCOE pipe manufacturing process and their variation rules were studied. Based on the RIKS method, the bearing capacity of the submarine pipeline after forming was analyzed, and the influence of different manufacturing process parameters on the collapse capacity of the structure was studied. The results show that the forming process of JCOE will cause residual stress and residual deformation of pipelines, expanding process can alleviate the stress concentration and residual deformation caused by the forming process, and improve the compressive failure capacity of pipeline. © 2022, Editorial Board of Journal of Ship Mechanics. All right reserved.
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页码：1363 / 1372
页数：9
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