考虑不同管土作用模型的海底多跨管道动力特性  

Dynamic Characteristics of Submarine Multi-Span Pipelines Considering Different Pipe-Soil Interaction Models

作　　者：赵瑞[1] 贾昆 闫术明[3] 徐万海[2] 马烨璇 ZHAO Rui;JIA Kun;YAN Shuming;XU Wanhai;MA Yexuan(School of Science,Tianjin University of Technology,Tianjin 300384,China;State Key Laboratory of Hydraulic Engineering Simulation and Safety,Tianjin University,Tianjin 300072,China;China Petroleum Pipeline Engineering Corporation,Langfang 065000,Hebei,China)

机构地区：[1]天津理工大学理学院,天津300384 [2]天津大学水利工程仿真与安全国家重点实验室,天津300072 [3]中国石油天然气管道工程有限公司,河北廊坊065000

出　　处：《船舶工程》2021年第3期136-141,共6页Ship Engineering

基　　金：国家自然科学基金(51679167)。

摘　　要：当前,海底多跨管道涡激振动分析多将管土段简化为固支或简支边界。针对此问题,采用3种更为复杂的土体模型,研究对比不同管土作用对多跨管道涡激振动特性的影响。采用尾流振子模型模拟流-固耦合作用,构建考虑流-固-土多场耦合的悬跨管道涡激振动预报模型,分析不同土体模型下的管道动力学规律。研究结果表明:不同的管土模型会对管道振动产生不同程度的影响,且管土非线性作用会明显制约管道的振动特征,使最大位移幅值和局部应变等发生改变。Currently, most of the studies about the vortex-induced vibration of the submarine multi-span pipelines make the pip-soil end simplify to be fix-supported boundary or simply-supported boundary. Aiming at the problem, three more complex soil models are adopted to analyze and compare the effects of different soil actions on the vortex-induced vibration characteristics of multi-span pipelines. The soil spring is used to simulate the pipe-soil interaction, and the wake oscillator model is used to simulate the fluid-structure interaction. A multi-span pipeline prediction model considering the multi-field coupling of fluid-structure-soil is constructed. The dynamic characteristics of the pipeline under different soil models are analyzed. The results show that different pipe-soil models have different degrees of influence on the vibration of pipelines. The nonlinear action of pipe-soil significantly changes the vibration characteristics of pipelines, and have great influence on the maximum displacement amplitude and strain.

关 键 词：管土耦合 多跨管道 涡激振动 土体弹簧 

分 类 号：TV312[水利工程—水工结构工程]