摘要
随着各城市地铁交通系统的逐渐完善,地铁火灾安全问题得到了人们广泛的关注。为了预防地铁车厢内火灾事故的发生,保障人民人身安全、减少财产损失。基于轰燃的典型判据,对地铁车厢内火灾发展的轰燃过程进行了分析研究。利用FDS建立了我国典型B型地铁列车车厢的火灾数值模拟模型,得到车厢内火灾温度特性参数的变化。结果表明:基于最不利火灾场景,地铁车厢内轰燃现象发生具有区域性,各区域轰燃的发生存在时间差,轰燃时间集中在160s^320s之间。各区域轰燃强度存在差异,最大轰燃强度可达5.8℃/s。
With the improvement of the subway transportation system in each city,the problem of fire safety in the subway has been paid more and more attention,so as to prevent the occurrence of fire accidents in subway train,protect people's personal safety and reduce property losses.Based on the typical flashover criterion,the flashover process of the development of fire in subway cars is analyzed and studied in this paper.FDS is used to build a fire numerical simulation model of typical B-type subway car in China,and the changes of fire temperature characteristic parameters in the car are obtained.The results show that:based on the most unfavorable fire scenario,the flashover phenomenon in subway cars is regional,and the flashover time in each region is between 160s and 320s.The flashover intensity varies from region to region,and the maximum flashover intensity can reach 5.8℃/s.
作者
张金
杨振宏
Zhang Jin;Yang Zhenhong(School of Resource Engineering,Xi'an University of Architecture and Technology,Xi'an,710055,Shaanxi)
出处
《建设科技》
2020年第12期88-91,共4页
Construction Science and Technology
关键词
安全工程
地铁车厢
温度变化率
数值仿真
轰燃
safety engineering
subway carriage
rate of temperature change
numerical simulation
flashover
