摘要
利用正交试验设计方法和FDS模拟技术,对影响地铁隧道火灾能见度的火源功率、通风风速、阻塞比和列车长度开展研究。设计四因素三水平正交试验,得到各因素的影响效果排序,并拟定所要分析的各因素之间的交互作用,根据方差分析对各因素以及其交互作用的影响效果和最危险的火灾工况进行确定,分析各因素对能见度影响规律。结果表明:能见度达到临界值时烟气的蔓延距离受到通风风速的影响最大,其次是列车长度。单因素的作用明显大于交互作用效果。
To research the effect of the fire power, ventilation speed, blocking ratio and the length of the train on the visibility in subway tunnel fire, by using the orthogonal experimental design method and the FDS simulation technology, four factors and three levels orthogonal experiment was carried out to obtain the effect sorting of the above four factors, and to propose the interaction between factors which needed to be analyzed. And then according to the analysis of variance, the effects of the four factors, their interac- tion effects and the most dangerous working condition of fire were obtained. The variation law of the visibility based on the above four factors was also briefly analyzed. The results showed that the ven- tilation speed has the greatest impact on the spread distance when the visibility reached the critical value, and the second effect factor is the length of the train. Moreover, the single factor affects the visibility more significantly than the interaction effect.
出处
《消防科学与技术》
CAS
北大核心
2017年第11期1521-1523,共3页
Fire Science and Technology
关键词
地铁隧道
火灾
正交试验
FDS模拟
能见度
subway tunnel
fire
orthogonal experiment
FDS simulation
visibility
