TY - JOUR
T1 - Global lateral buckling analysis of idealized subsea pipelines
AU - Liu, Run
AU - Liu, Wen Bin
AU - Wu, Xin Li
AU - Yan, Shu Wang
N1 - Funding Information:
Foundation item: Project(51021004) supported by Innovative Research Groups of the National Natural Science Foundation of China; Project(NCET-11-0370) supported by Program for New Century Excellent Talents in Universities of China; Project(40776055) supported by the National Natural Science Foundation of China; Project(1002) supported by State Key Laboratory of Ocean Engineering Foundation, China Received date: 2012−12−21; Accepted date: 2013−05−10 Corresponding author: LIU Run, Professor, PhD; Tel: +86−22−27404286; E-mail: [email protected]
PY - 2014/1
Y1 - 2014/1
N2 - In order to avoid the curing effects of paraffin on the transport process and reduce the transport difficulty, usually high temperature and high pressure are used in the transportation of oil and gas. The differences of temperature and pressure cause additional stress along the pipeline, due to the constraint of the foundation soil, the additional stress can not release freely, when the additional stress is large enough to motivate the submarine pipelines buckle. In this work, the energy method is introduced to deduce the analytical solution which is suitable for the global buckling modes of idealized subsea pipeline and analyze the relationship between the critical buckling temperature, buckling length and amplitude under different high-order global lateral buckling modes. To obtain a consistent formulation of the problem, the principles of virtual displacements and the variation calculus for variable matching points are applied. The finite element method based on elasto-plastic theory is used to simulate the lateral global buckling of the pipelines under high temperature and pressure. The factors influencing the lateral buckling of pipelines are further studied. Based upon some actual engineering projects, the finite element results are compared with the analytical ones, and then the influence of thermal stress, the section rigidity of pipeline, the soil properties and the trigging force to the high order lateral buckling are discussed. The method of applying the small trigging force on pipeline is reliable in global buckling numerical analysis. In practice, increasing the section rigidity of a pipeline is an effective measure to improve the ability to resist the global buckling.
AB - In order to avoid the curing effects of paraffin on the transport process and reduce the transport difficulty, usually high temperature and high pressure are used in the transportation of oil and gas. The differences of temperature and pressure cause additional stress along the pipeline, due to the constraint of the foundation soil, the additional stress can not release freely, when the additional stress is large enough to motivate the submarine pipelines buckle. In this work, the energy method is introduced to deduce the analytical solution which is suitable for the global buckling modes of idealized subsea pipeline and analyze the relationship between the critical buckling temperature, buckling length and amplitude under different high-order global lateral buckling modes. To obtain a consistent formulation of the problem, the principles of virtual displacements and the variation calculus for variable matching points are applied. The finite element method based on elasto-plastic theory is used to simulate the lateral global buckling of the pipelines under high temperature and pressure. The factors influencing the lateral buckling of pipelines are further studied. Based upon some actual engineering projects, the finite element results are compared with the analytical ones, and then the influence of thermal stress, the section rigidity of pipeline, the soil properties and the trigging force to the high order lateral buckling are discussed. The method of applying the small trigging force on pipeline is reliable in global buckling numerical analysis. In practice, increasing the section rigidity of a pipeline is an effective measure to improve the ability to resist the global buckling.
UR - http://www.scopus.com/inward/record.url?scp=84896338736&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84896338736&partnerID=8YFLogxK
U2 - 10.1007/s11771-014-1955-y
DO - 10.1007/s11771-014-1955-y
M3 - Article
AN - SCOPUS:84896338736
SN - 2095-2899
VL - 21
SP - 416
EP - 427
JO - Journal of Central South University
JF - Journal of Central South University
IS - 1
ER -