海底振动管道局部泥沙冲刷数值研究  

Numerical investigation of local scour around a vibrating pipeline under steady current

作　　者：殷俊 刘名名 冀昊 金鑫 郭晓玲[4] YIN Jun;LIU Ming-ming;JI Hao;JIN Xin;GUO Xiao-ling(State Power Investment Corporation Guangdong Electric Power Co.Ltd.,Guangzhou 510130,China;College of Energy,Chengdu University of Technology,Chengdu 610059,China;General Institute of Hydropower Planning and Design,Beijing 100120,China;Patent Examination Cooperation(Tianjin)Center of the Patent Office,CHIPA,Tianjin 300304,China)

机构地区：[1]国家电投集团广东电力有限公司,广州510130 [2]成都理工大学能源学院,成都610059 [3]水电水利规划设计总院,北京100120 [4]国家知识产权局专利局专利审查协作天津中心,天津300304

出　　处：《水道港口》2020年第2期197-203,共7页Journal of Waterway and Harbor

基　　金：大连理工大学海岸和近海工程国家重点实验室开放基金项目(LP1912);油气藏地质及工程开发国家重点实验室项目(PLC2020038)。

摘　　要：文章基于迎风有限元方法,对流动方程和泥沙输运方程进行求解,建立起振动管道与泥沙冲刷的耦合运动模型。模型中通过SST k-ω湍流模型对湍流效应进行模拟;管道振动和海床变形引起的不确定边界通过ALE方法进行实时追踪;模型考虑了悬移质输沙率以及推移质输沙率对底床变形的影响作用。数值模型首先与其他已发表的数据进行了比较,表明文章所建立的振动管道局部冲刷程序能够对冲刷深度进行较为准确地预测。文章利用所建数值模型进一步对海底振动管道局部冲刷问题开展了数值研究。相关数值分析结果表明:相对于固定管道的情况,管道振动对局部冲刷有较大的影响作用,管道的振动使管道局部最大冲刷深度增大,管道后方冲刷范围变宽,最大冲刷深度位置后移。A two-dimensional finite element numerical model was developed to predict local scour around a vibrating submarine pipeline in steady current.The numerical model is based on the two-dimensional Navier-Stokes equations with Shear-Stress Transport(SST)k-ωturbulence model closure.Both suspended load and bed load sediment transportations were considered.The moving boundaries induced by the vibrating pipeline and the evolution of the seabed due to local scour were tracked by using the Arbitrary Lagrangian-Eulerian(ALE)method.Comparisons with the available experimental data show satisfactory agreements.The numerical model was then used to investigate local scour around a vibrating pipeline.Present numerical results show that vibrating of the pipeline makes the scour depth deeper,scour scope behind the pipeline wider and location of the maximum scour depth to the rear of the pipeline compared with the case of fixed pipeline.

关 键 词：海底管道 涡激振动 局部冲刷 数值模拟 

分 类 号：U17[交通运输工程] P75[天文地球—海洋科学]