隧道并行输气管道爆炸对邻管的冲击效应分析

发布时间：2018-01-05 01:10

本文关键词：隧道并行输气管道爆炸对邻管的冲击效应分析　出处：《中国安全生产科学技术》2017年01期 　论文类型：期刊论文

【摘要】：针对隧道内输气管道泄漏发生爆炸对相邻管道的潜在威胁,基于泄漏率的求解,得到爆炸气体的扩散分布规律,确定蒸气云爆炸的TNT当量;利用LS-DYNA有限元软件建立隧道并行输气管道爆炸模型,分析在不同的泄漏尺寸、爆心距和风速下,邻管对爆炸冲击的动力学响应。基于峰值振速的经验公式的验证,表明所采用的管隧模型的可行性。结果表明:在内压和爆炸荷载的共同作用下,隧道内管道的等效应力和速度会出现多个峰值,有别于开敞空间的爆炸规律;泄漏尺寸越小、爆心距和风速越大,管道的动力响应越小;相比爆心距和风速,管道的动力响应峰值对泄漏尺寸的变化更敏感。研究成果可为管隧结构在极端情况下的事故预防和维护抢修提供理论指导。
[Abstract]:Based on the solution of leakage rate, the diffusion distribution law of explosion gas is obtained, and the TNT equivalent of vapor cloud explosion is determined. The explosion model of tunnel parallel gas transmission pipeline is established by using LS-DYNA finite element software, and the explosion model is analyzed under different leakage size, burst center distance and wind speed. Based on the empirical formula of peak vibration velocity, the feasibility of the tunnel model is demonstrated. The results show that the internal pressure and explosion load are combined. The equivalent stress and velocity of the pipeline in the tunnel will have multiple peaks, which is different from the explosion law in open space. The smaller the leakage size, the greater the distance between the center of explosion and the wind speed, the smaller the dynamic response of the pipeline. The peak dynamic response of the pipeline is more sensitive to the change of the leakage size than the explosion center distance and wind speed. The research results can provide theoretical guidance for the accident prevention and maintenance and repair of the tunnel structure in extreme cases.
【作者单位】：西南石油大学石油与天然气工程学院;油气消防四川省重点实验室;中石油天然气销售东部分公司;
【基金】：油气消防四川省重点实验室开放基金项目(YQXF201601)
【分类号】：TE88
【正文快照】： 0引言近年来,随着我国输气管道建设速度的加快,输气管道采用管隧并行敷设方式通过各种障碍点的情况日益增多。例如,中卫—贵阳输气管道通过秦岭和大娄山区,与西气东输二线、兰成原油管道、兰成渝成品油管道、中缅原油管道并行敷设,其中,与兰成原油管道共用40座隧道,全长约42.9

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