刘源^1,2, 苗春生³, 余建星¹, 段晶辉¹, 郭帅¹, 马维林⁴
AuthorsHTML:刘源^1,2, 苗春生³, 余建星¹, 段晶辉¹, 郭帅¹, 马维林⁴
AuthorsListE:Liu Yuan^1,2, Miao Chunsheng³, Yu Jianxing¹, Duan Jinghui¹, Guo Shuai¹, Ma Weilin⁴
AuthorsHTMLE:Liu Yuan^1,2, Miao Chunsheng³, Yu Jianxing¹, Duan Jinghui¹, Guo Shuai¹, Ma Weilin⁴
Unit:1. 天津大学水利工程仿真与安全国家重点实验室，天津 300072；2. 上海交通大学高新船舶与深海开发装备协同创新中心，上海 200240；3. 海洋石油工程股份有限公司，天津 300461；4. 中国海洋大学工程学院，青岛 266100
Unit_EngLish:1．State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China
2．Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai 200240, China
3．Offshore Oil Engineering Corporation Limited, Tianjin 300461, China
4．College of Engineering, Ocean University of China, Qingdao 266100, China
Abstract_Chinese:运用二维环模型模拟管道, 采用非线性离散弹簧模型模拟了管道外壁与扣入式止屈器内壁之间的接触．建立了其结构的弹塑性本构关系, 构建了海底管道二维屈曲接触力学模型, 研究分析了海底管道在屈曲和管壁接触过程中的承载力、结构变形以及截面应力分布等的变化规律．为了验证该理论分析方法的准确性, 将理论分析结果与ABAQUS软件的模拟结果进行了对比, 结果吻合良好; 最后, 将理论计算得到的屈曲压溃压力和屈曲传播压力分别与ABAQUS软件模拟结果及全比例管道屈曲试验进行了对比, 证明了该理论方法的可靠性．该理论研究为进一步研究管道的屈曲传播力学机制和止屈技术奠定了基础．
Abstract_English:In order to research the mechanism in subsea pipelines，a two-dimensional ring model is used to represent the discussed pipe and a nonlinear discrete spring model is adopted to simulate contact between the outer wall of the pipe and the inner wall of the slip-on arrestor during the process of buckling propagation. The variation of bearing capacity，structure deformation and stress distribution of pipelines is studied based on an elastoplastic constitutive relationship of two-dimensional buckling and contacting mechanics model. Comparison between theoretical and ABAQUS results is presented to verify the accuracy of the analysis model. Comparisons among theoretical results，ABAQUS simulations and full-scale model experiment results of pipeline collapse pressure and propagation pressure are made to verify the reliability of the theory above. Further research could be achieved based on the theory discussed in this paper.
Keyword_Chinese:海底管道; 屈曲传播; 非线性接触; 扣入式止屈器; 屈曲传播压力
Keywords_English:subsea pipeline; buckling propagation; nonlinear contact; slip-on arrestor; buckling propagation pressure

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