天然气管道水下穿越爆裂事故模拟分析  

Simulation Analysis of Underwater Crossing Burst Accident of Natural Gas Pipeline

作　　者：李强 

机构地区：[1]中国石油管道局工程有限公司国际事业部,河北 廊坊

出　　处：《石油天然气学报》2020年第2期370-376,共7页Journal of Oil and Gas Technology

摘　　要：管道爆裂是长输管道的典型事故,也是引起其他一些事故的重要原因。基于水下穿越天然气管道受多种因素的影响,使得研究水下穿越天然气管道爆裂实验有一定难度。采用ANSYS/LS-DYNA软件系统对下水穿越天然气管道爆裂事故进行了模拟。通过研究泄漏气体在水环境中形成气泡的扩散速度和裂纹扩展速度以及压力场对相邻管道的影响,确定了从泄漏点气体流动达到准静止流动状态前的气泡运动参数和天然气管道的运动学特性,该结果可为水下穿越段长输管线的建设、维护和运行提供一定的参考。Pipe break is a typical accident occurred in long-distance pipelines and might be the cause of other similar accidents. Owing to many factors affecting submarine pipelines transporting natural gas, it proved extremely difficult to detect and examine the explosion in submarine pipelines crossing point. In this research, the ANSYS/LS-DYNA software solution is applied to simulate breakages in underwater gas transmission pipelines at crossing points. The gathered data as the distribution rate for emission of gas bubbles from leak point jointly with the rate of crack growth on pipes and pressure distribution rate influencing over the adjacent pipe in the aquatic environment are useful in assessing the bubbles movement parameters before the gas flow from the leak point reaches a quasi-static flow state and pipeline kinematic characteristic. The findings of the research can be applied in construction, maintenance and commissioning of long-distance submarine pipeline crossing.

关 键 词：天然气管道 水下穿越 爆裂 ANSYS/LS-DYNA软件 

分 类 号：TE9[石油与天然气工程—石油机械设备]