CAJ | 학술논문

为确保整套系统的安全运行，以某输气管道为研究对象进行三维数值模拟方法的研究。依据经典力学理论，分析了在均匀内压作用下管道的应力特征，总结对比了管道的失效准则。在此基础上建立了管道的三维数值模型，考虑基础沉降的影响对管道变形与力学状态进行了数值模拟，分析并得到管道应力随基础沉降量的变化规律。结果表明：应用该方法可以比较真实地模拟出管道的应力和变形分布规律，确定管道基础沉降的敏感位置和沉降临界值，为管道的现场施工、实时监测和安全性分析提供有价值的参考意见。
위학보정투계통적안전운행，이모수기관도위연구대상진행삼유수치모의방법적연구。의거경전역학이론，분석료재균균내압작용하관도적응력특정，총결대비료관도적실효준칙。재차기출상건립료관도적삼유수치모형，고필기출침강적영향대관도변형여역학상태진행료수치모의，분석병득도관도응력수기출침강량적변화규률。결과표명：응용해방법가이비교진실지모의출관도적응력화변형분포규률，학정관도기출침강적민감위치화침강림계치，위관도적현장시공、실시감측화안전성분석제공유개치적삼고의견。
To ensure the safe operation of the entire system, research on 3D numerical simulation of a gas pipeline is carried out in this article. According to the classical mechanics theory, the stress characteristic of pipeline under uniform internal pressure is analyzed, and the failure criterion of pipeline is summarized and compared. On this basis, 3D numerical model is established, and the deformation and mechanics state of pipeline under foundation settlement are simulated. The change rule of stress varying with foundation settlement is then obtained. The results show that the pipeline stress and deformation distribu-tion are really simulated, then the sensitive position and critical value of the foundation settlement of pipeline are determined. Thus it could provide valuable reference opinions for site construction, real-time monitoring and safety analysis of pipeline.