盾构隧道竖井内油气管道流固耦合振动特性分析  

Analysis of Fluid-solid Coupling Vibration Characteristics for Oil and Gas Pipeline in Shield Tunnel Shaft

作　　者：孔令钱 唐怀平[1] 陈荟键 肖骁千里 KONG Lingqian;TANG Huaiping;CHEN Huijian;XIAO Xiaoqianli(School of Mechanics and Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]西南交通大学力学与工程学院,成都610031

出　　处：《四川轻化工大学学报（自然科学版）》2020年第1期32-37,共6页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：国家自然科学基金(51778548)。

摘　　要：对某盾构隧道竖井内的油气管道,基于ANSYS Workbench平台建立流固耦合振动有限元模型,采用直接耦合方法对油气管道进行结构模态特性计算。仿真模拟考虑了内部流体和外部静水与管道耦合作用、管道固定导向支座约束、管道壁厚以及流体介质密度对油气管道固有频率和振型的影响。结果表明:流固耦合作用和固定导向支座约束都会降低管道的固有频率,其中外部静水对管道固有频率的影响较大,不可忽略;管道的固有频率随壁厚增大而增大,随流体介质密度增大而减小;管道的低阶模态属于梁式振动形态,高阶模态属于壳式振动形态,流固耦合作用对管道的振型没有影响。Based on ANSYS Workbench platform,the fluid-solid coupling finite element model is established for oil and gas pipeline in a shield tunnel shaft.The direct coupling method is used to calculate the structural modal characteristics of oil and gas pipeline.The effects of coupling between internal fluid and external static water,constraint of fixed guide support,wall thickness of pipeline and density of fluid medium on the natural frequency and vibration mode of oil and gas pipeline are considered in the simulation.The results show that both fluid-solid coupling and fixed guide support constraint could reduce the natural frequency of the pipeline.The external static water has a great influence on the natural frequency of the pipeline,which can not be ignored.The natural frequency of the pipeline increases with the increase of wall thickness,and decreases with the increase of medium density.The lower order mode of the pipeline belonges to the beam vibration form,while the higher order mode belonges to the shell vibration form.Fluid-solid coupling has no effect on the vibration mode of the pipeline.

关 键 词：油气管道 流固耦合 固有频率 振型 

分 类 号：TE832[石油与天然气工程—油气储运工程]