Numerical Study on Lateral Buckling Mode of Pipelines Laid on A Sleeper  

作　　者：LIU Run HAO Xin-tong LI Cheng-feng YU Zheng LI Qing-xin 

机构地区：[1]State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China

出　　处：《China Ocean Engineering》2023年第3期495-505,共11页中国海洋工程（英文版）

基　　金：financially supported by the National Science Fund for Distinguished Young Scholars of China (Grant No.51825904)。

摘　　要：Because non-buried submarine pipelines under cyclic thermal loading are prone to global buckling,sleepers are commonly laid along the pipeline route to induce a series of relatively small and controllable lateral buckling.A finite element model which can simulate the transformation of pipeline laid on a sleeper from vertical buckling to lateral buckling is established in this work.The parameters of sleeper affecting pipeline buckling modes are analysed,and a new kind of sleeper is proposed aimed at avoiding antisymmetric buckling.Results show that the lateral trigger force can avoid antisymmetric lateral buckling when acting between 1℃and 13℃before the critical buckling temperature.The range increases slightly with increasing trigger force.Compared with an ordinary sleeper,the proposed new sleeper with slider can reduce the critical buckling temperature by 25%,which significantly improves the success rate of sleepers.

关 键 词：submarine pipeline buckling mode initial imperfection new sleeper 

分 类 号：P756.2[天文地球—海洋科学]