基于FLACS的砌体住宅楼天然气泄漏爆炸事故模拟研究
Simulation research on natural gas leakage explosion accident in masonry residential building based on FLACS
王江楠 1姚颖康 1董思玲 1刘尚校2
作者信息
- 1. 江汉大学 省部共建精细爆破国家重点实验室,湖北 武汉 430056
- 2. 湖北省消防救援总队,湖北 武汉 430060
- 折叠
摘要
针对砌体住宅楼结构特点,以瓦房店市居民楼燃气闪爆事故为研究对象,利用FLACS软件三维建模爆炸楼层,考虑泄漏方向、门窗和隔板等影响,模拟气体的泄漏和爆炸,对比不同泄漏方向下天然气云团的扩散过程和不同时间下爆炸冲击压力的分布.结果表明,垂直向上和水平向屋内两个泄漏方向的不同,对天然气体积分数分布几乎无影响;门厅隔板阻碍扩散,天然气在厨房体积分数较高;爆炸初始,504室爆炸压力急剧升高,压力冲击波经门窗隔板以圆弧形式向外传递;400 s时刻比 600 s爆炸压力小;600 s爆炸时刻的压力大于砖墙破坏压力76 kPa,结构发生破坏.研究成果为事故反演、受损结构稳定性评价和事故预防提供理论指导.
Abstract
Aiming at the structural characteristics of masonry resi-dential buildings,taking the gas flash explosion accident in resi-dential buildings in Wafangdian city as the research object,FLACS software was used to model explosive floor in 3D.Gas leakage and explosion were simulated considering injection direc-tion,doors,windows,partitions and other factors.Results showed that,horizontal and vertical leakage have almost no im-pact on the volume fraction distribution of natural gas,with kitchen volume fraction higher due to hall partition obstructing ef-fect;Room 504 explosion pressure increased sharply at the begin-ning of explosion,transmitted outward through doors and win-dows in arc form.Explosion pressure at 400 s was lower than 600 s,with pressure at 600 s explosion greater than brick wall failure pressure of 76 kPa causing structure damage.Research results provide theoretical guidance for accident inversion,stability evalu-ation of damaged structures and accident prevention.
关键词
砌体住宅楼/天然气泄漏/天然气爆炸/FLACS软件/数值模拟Key words
masonry residential building/gas leaks/gas explo-sions/FLACS/simulation引用本文复制引用
基金项目
湖北省重点研发计划项目(2020BCA084)
出版年
2024
NETL
NSTL
万方数据