木结构吊脚楼火灾轰燃临界值预测研究

为探究木结构吊脚楼受限空间内火灾发展过程中的轰燃临界现象,以贵州省某典型木结构吊脚楼为研究对象,利用突变理论结合数值模拟软件量化分析其受限空间内火灾发展过程中的轰燃临界值。结果表明:木结构吊脚楼建筑受限空间内火灾发展过程中的轰燃现象具有燕尾突变特征,得到的轰燃临界温度为951.5 K;利用数值模拟得到的轰燃临界温度为953.4 K,与前者相比具有较好的一致性。木结构吊脚楼受限空间火灾轰燃现象的发生与外界风速关联性不大。

Prediction of critical value of fire flashover in stilted buildings with timber structure

In order to explore critical phenomenon of flashover during fire development process in restricted space of wooden stilted buildings,with a typical wooden stilted building in Guizhou province taken as an object,critical value of flashover was quantitatively analyzed by using mutation theory and numerical simulation software.The results show that flashover phenomenon of stilted buildings with timber structure features Swallowtail Catastrophe,and the critical temperature calculated by it is 951.5 K while that calculated by numerical simulation is 953.4 K,which is comparatively consistent with the former.It is also found that occurrence of flashover in confined space has little relation with external wind speed.