Global buckling behavior of submarine unburied pipelines under thermal stress  

作　　者：郭林坪 刘润 闫澍旺 

机构地区：[1]State Key Laboratory of Hydraulic Engineering Simulation and Safety (Tianjin University)

出　　处：《Journal of Central South University》2013年第7期2054-2065,共12页中南大学学报（英文版）

基　　金：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

摘　　要：Buckling of submarine pipelines under thermal stress is one of the most important problems to be considered in pipeline design. And pipeline with initial imperfections will easily undergo failure due to global buckling under thermal stress and internal pressure. Therefore, it is vitally important to study the global buckling of the submarine pipeline with initial imperfections. On the basis of the characteristics of the initial imperfections, the global lateral buckling of submarine pipelines was analyzed. Based on the deduced analytical solutions for the global lateral buckling, effects of temperature difference and properties of foundation soil on pipeline buckling were analyzed. The results show that the snap buckling is predominantly governed by the amplitude value of initial imperfection; the triggering temperature difference of Mode I for pipelines with initial imperfections is higher than that of Mode I1; a pipeline with a larger friction coefficient is safer than that with a smaller one; pipelines with larger initial imperfections are safer than those with smaller ones.Buckling of submarine pipelines under thermal stress is one of the most important problems to be considered in pipeline design. And pipeline with initial imperfections will easily undergo failure due to global buckling under thermal stress and internal pressure. Therefore, it is vitally important to study the global buckling of the submarine pipeline with initial imperfections. On the basis of the characteristics of the initial imperfections, the global lateral buckling of submarine pipelines was analyzed. Based on the deduced analytical solutions for the global lateral buckling, effects of temperature difference and properties of foundation soil on pipeline buckling were analyzed. The results show that the snap buckling is predominantly governed by the amplitude value of initial imperfection; the triggering temperature difference of Mode I for pipelines with initial imperfections is higher than that of Mode II; a pipeline with a larger friction coefficient is safer than that with a smaller one; pipelines with larger initial imperfections are safer than those with smaller ones.

关 键 词：submarine pipeline lateral buckling analytical solution initial imperfection subsoil friction resistance 

分 类 号：TE973[石油与天然气工程—石油机械设备]