Dynamic Response Analysis of Suspended Submarine Pipeline Based on Soil Triaxial Test
Based on the traits of seafloor soil and marine environment in ChengDao oilfield,a nonlinear finite element model of suspended submarine pipeline coupled with sea-floor soil is developed with the finite element analysis software ANSYS.Discarding the traditional and imprecise pipeline model with double ends clamped or simply supported,the nonlinear effect between pipeline and seafloor soil is simulated by nonlinear springs.In order to get more accurate results,soil in a series of underground depths are sampled and by dynamic trialxial test system,triaxial compression test is carried out on sampled muddy clay,clay,silt and silty clay.P-Y curves of different types of soil are obtained and handled to be characteristics of nonlinear springs,and ba sed on that,effects of seafloor soil and structure proportion of spans on dynamic response of suspended submarine pipeline are discussed.The research demonstrated that,vortex-induced vibration is most likely to happen to suspended pipeline with muddy clay in both ends,and the harder the seafloor soil is,the safer the pipeline will be.Besides,the safest structure proportions of pipe with continuous spans are obtained.The analysis is instructive for preventing and controlling the suspending of submarine pipeline.
suspended pipeline pipe-soil coupling triaxial compression test dynamic response
Bing SHAO Yifei YAN Tingting JANG Xiangzhen YAN
College of Mechanical and Electronic Engineering,China University of Petroleum,Qingdao 266580,Shando College of Pipeline and Civil Engineering,China University of Petroleum,Qingdao 266580,Shandong,Chin
国际会议
西安
英文
1-4
2012-10-01（万方平台首次上网日期，不代表论文的发表时间）