管-土相互作用对海底管道横向屈曲的影响  

The effect of pipe-soil interaction on the lateral buckling of seafloor pipeline

作　　者：刘羽霄[1] 葛涛[1] 李昕[2] 周晶[2] 

机构地区：[1]山东工商学院 [2]大连理工大学海岸与近海工程国家重点实验室

出　　处：《石油机械》2011年第8期7-10,2,共4页China Petroleum Machinery

基　　金：国家自然科学基金重点项目"海底管线的损伤机理和健康诊断研究"(50439010);教育部重大项目"长距离油气管线的破坏机理;安全评估和防灾对策研究"(305003)

摘　　要：基于ANSYS建立了平坦海床上裸铺管道的非线性有限元模型,分析了管-土相互作用参数对海底管道前屈曲及后屈曲的影响。结果表明,管道屈曲的临界温差、最大弯矩及最大轴向总应变随着横向摩擦因数的增大而增大,管道总屈曲段长度随着横向摩擦因数的增大而缩短;轴向摩擦因数对管道临界屈曲载荷、后屈曲的变形、弯矩及应变影响很小;管道屈曲的临界温差随着土体屈服位移的增大而减小。The nonlinear finite element model of pipeline exposed on flat seabed was established through the ANSYS software. A detailed analysis of the effect of the pipe-soil interaction on the pre-buckling and post-buckling of seafloor pipeline was conducted. The result showed that the critical temperature, maximum bending moment and maximum total axial strain of the pipeline buckling increased with the increase of lateral frictional factor, the total buckling length of pipeline shortened with the increase of lateral frictional factor, the axial frictional factor did not have remarkable effect on the pre-buckling and post-buckling of pipeline, and the critical temperature of pipeline buckling decreased with the increase of soil yield displacement.

关 键 词：相互作用参数 海底管道 后屈曲 摩擦因数 临界屈曲载荷 临界温差 最大弯矩 有限元模型 

分 类 号：TB34[一般工业技术—材料科学与工程]