基于FDS的某小吃店火灾亡人原因分析

对贵州一起"三合一"场所火灾进行建模重构,依据真实火灾数据,利用FDS软件设置相关参数重现火灾的发展过程,得到温度、烟气蔓延数据,并与实际火灾现场相应部位的痕迹特征进行对照,验证了起火部位和火灾蔓延发展过程。通过温度、CO体积分数切片以及相对有效暴露剂量(FED)的综合分析,对最终人员在高温与烟气的共同作用下死亡做出了合理解释。同时对模拟得到的温度和CO体积分数数据进行处理,与已知的经验公式和经验曲线相关联,粗略推算出人员死亡时间。研究结果可为类似火灾调查提供参考。

Analysis on death cause of a snack bar fire based on FDS

A three-in-one building fire in Guizhou was taken as the research object. The test was demonstrated by setting the relevant parameters of a real fire case in the FDS software to reconstruct the development process of the fire. The data of temperature and smoke were gotten, which were compared with the patterns of the corresponding parts of the actual fire scene. The fire position and the development process of fire spread were verified. Through the comprehensive analysis of temperature, carbon monoxide concentration slice and fractional effective exposure dose (FED), a reasonable explanation was made for the final death under the combined action of high temperature and smoke. The temperature and CO concentration data were processed, to combine with the empirical formulas and curves, and calculate the death time. The results can help with the fire investigation of similar fire accidents.