海底管道JCOE成形引起的残余变形及其对压溃承载能力的影响  

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

作　　者：谢鹏 刘昊[1] 常江涛 XIE Peng;LIU Hao;CHANG Jiang-tao(Sun Yat-sen University,Zhuhai 519000,China;Southern Laboratory of Ocean Science and Engineering(Zhuhai),Zhuhai 519000,China)

机构地区：[1]中山大学,广东珠海519000 [2]海洋科学与工程广东省实验室(珠海),广东珠海519000

出　　处：《船舶力学》2022年第9期1363-1372,共10页Journal of Ship Mechanics

基　　金：中央高校基本科研业务费项目(18LGPY24);工业装备结构分析国家重点实验室开放基金(GZ18120);广东省促进经济高质量发展专项资金海洋经济发展项目(GDOE2020028,GDOE2019A19);国家自然科学基金资助项目(52001337)。

摘　　要：大口径海底管道在安装与服役过程中承受巨大的海水压力,易发生压溃失效,管道的这种压溃承载能力受管道制造过程引入的局部几何偏差和残余应力的影响。本文基于塑性理论与数值仿真方法,建立大口径海底管道“预弯-成形-扩径”一体化分析模型,研究JCOE线管制造工艺引起的管道残余应力、残余变形和成形力等关键力学参数及其变化规律。并基于RIKS方法,对成形后海底管道的压溃承载能力进行分析,研究不同制造工艺参数对结构压溃承载能力的影响。研究结果表明,管道JCOE成形过程会引起管道残余应力和残余变形,扩径可以缓解成形过程造成的应力集中和残余变形,提升管道的压溃承载能力。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.

关 键 词：海底管道 JCOE工艺 工艺参数 压溃 数值模拟 

分 类 号：TG386.1[金属学及工艺—金属压力加工]