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Nonlinear Contact Between Pipeline's Outer Wall and Slip-on Buckle arrestor's Inner Wall During Buckling Process

Journal of Ocean University of China 2017年第1期16卷 42-48页

作者： MA Weilin LIU Jiande DONG Sheng ZHANG Xin MA Xiaozhou College of Engineering Ocean University of China State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin University State Key Laboratory of Coastal and Offshore Engineering Dalian University of Technology

In order to theoretically study the buckle propagation of subsea pipelines with slip-on buckle arrestors, a two-dimensional ring model was set up to represent the pipeline and a nonlinear spring model was adopted to simulate the contact between pipeline's inner walls and between pipeline's outer wall and slip-on buckle arrestor's inner wall during buckle propagation. In addition, some reverse springs are added to prevent the wall of left and right sides separating from the inner wall of slip-on buckle arrestors. Considering large deformation kinematics relations and the elastic-plastic constitutive relation of material, balance equations were established with the principle of virtual work. The variation of external pressure with respect to the cross-sectional area of pipelines was analyzed, and the lower bound of the crossover pressure of slip-on buckle arrestors was calculated based on Maxwell's energy balance method. By comparing the theoretical results with experiment and finite element numerical simulation, the theoretical method is proved to be correct and reliable.

关键词： subsea pipeline buckle propagation nonlinear contact slip-on buckle arrestor crossover pressure

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Dynamic Analysis and Numerical Simulation of a Kind of arrestor Arresting Buckle Propagation by FEM

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China Ocean Engineering 1998年第3期13卷 323-332页

作者： Huang, YY Qian, Q Jin, T Huazhong Univ Sci & Technol Dept Mech Wuhan 430074 Peoples R China

For exact estimation of efficiency of a buckle arrestor, it is necessary to take the effect of structural inertia into account in the analysis of buckle propagation on elastic structures after meeting arrestors. Under this consideration, this paper deals with the dynamics of buckle arrest and its numerical simulation on the basis of the beam system model used by Chater and Hutchinson (1983). The FEM combined with an improving are-length control method is adopted to solve the dynamic equations describing the arresting of buckle propagation. A new group of parameters for arrestor design which differs greatly from that by the quasi-static analysis is obtained. The present results support the conclusion that the inertia of the beam cannot be neglected in such analysis.

关键词： buckle propagation arrestor beam nonlinear foundation finite element method

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Nonlinear Contact Between Pipeline’s Outer Wall and Slip-on Bucklearrestor’s Inner Wall During Buckling Process

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中国海洋大学学报（英文版） 2017年第1期 42-48页

作者： MA Weilin LIU Jiande DONG Sheng ZHANG Xin MA Xiaozhou College of Engineering， Ocean University of China State Key Laboratory of Hydraulic Engineering Simulation and Safety， Tianjin University State Key Laboratory of Coastal and Offshore Engineering， Dalian University of Technology

In order to theoretically study the buckle propagation of subsea pipelines with slip-on buckle arrestors, a two-dimensional ring model was set up to represent the pipeline and a nonlinear spring model was adopted to simulate the contact between pipeline’s inner walls and between pipeline’s outer wall and slip-on buckle arrestor’s inner wall during buckle propagation. In addition, some reverse springs are added to prevent the wall of left and right sides separating from the inner wall of slip-on buckle arrestors. Considering large deformation kinematics relations and the elastic-plastic constitutive relation of material, balance equations were established with the principle of virtual work. The variation of external pressure with respect to the cross-sectional area of pipelines was analyzed, and the lower bound of the crossover pressure of slip-on buckle arrestors was calculated based on Maxwell’s energy balance method. By comparing the theoretical results with experiment and finite element numerical simulation, the theoretical method is proved to be correct and reliable.

关键词： subsea pipeline buckle propagation nonlinear contact slip-on buckle arrestor crossover pressure

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