焊管2025，Vol.48Issue(7)：36-44,9.DOI:10.19291/j.cnki.1001-3938.2025.07.005
考虑流固耦合效应的跨断层输气管道力学分析
Mechanical Analysis of Cross-fault Gas Pipeline Considering Fluid-structure Coupling
摘要
Abstract
To ensure the safe operation of cross-fault buried pipelines during fluid transportation,the ADINA finite element software was utilized to establish a three element coupled model of cross-fault gas transmission pipelines,incorporating the fluid-structure coupling effect.Simulations were conducted to analyze the mechanical response of buried pipelines under different simulation conditions(empty pipe,uniform internal pressure and fluid-solid coupling),fault types(normal fault,reversed fault and strike-slip fault)and fluid pressure(6 MPa,8 MPa and 10 MPa).These analyses provide a theoretical reference for finite element modeling and safety design of cross-fault pipelines.The results show that compared with the conditions of empty pipe and uniform internal pressure,the finite element model considering fluid-solid coupling effect can more accurately simulate the mechanical response of buried gas pipelines under actual working conditions.The pipeline is mainly subject to tension when passing through the strike-slip fault and normal fault,while the pipeline is mainly subject to pressure when passing through the reversed fault.When the pipeline is subject to pressure,it is easy to produce local buckling instability and more likely to cause failure.Therefore,it is safer to pass through the strike-slip fault and the most dangerous to pass through the reversed fault.When fault displacement is less than 0.8 m,a certain operational pressure(8 MPa)can enhance the pipeline's ability to resist dislocation due to strike-slip fault.High-pressure transportation leads to the pipeline deformation under the combined action of fault dislocation and fluid pressure.When passing through the reversed fault,lower operational pressure can ensure the safe operation of buried pipelines.关键词
埋地输气管道/流固耦合/断层/流体压力Key words
buried gas transmission pipeline/fluid-structure coupling/fault/fluid pressure分类
能源科技引用本文复制引用
李乔楚,付凌迪,董超..考虑流固耦合效应的跨断层输气管道力学分析[J].焊管,2025,48(7):36-44,9.基金项目
国家社会科学基金重大项目"能源革命驱动下的天然气产业高质量发展路径研究"(项目编号22&ZD105) （项目编号22&ZD105）
四川省哲学社会科学重点研究基地学术研究专项资助项目"新质生产力赋能四川天然气产业高质量发展的作用机理及政策建议"(项目编号SC24E091). （项目编号SC24E091）
