基于Monte Carlo的喷淋响应时间特性研究

A Monte Carlo Simulation on Response Time of Sprinkler

自动喷水灭火系统可以有效控制和扑灭初期火灾,因此整个系统的响应时间成了灭火的关键。利用Monte Carlo方法进行随机取样模拟实验,建立了包含喷头响应时间指数、火灾增长因子、火源与喷头径向间距、火源与顶棚垂直间距等影响因素的喷头响应时间模型,并通过大量数据分析得到了响应时间的分布特性。结果表明,响应时间基本符合对数正态分布。响应时间与喷头响应时间指数线性相关,随火灾增长因子的增大而缩短,随径向间距的增大而增长,随着垂直间距的增大先是略为下降而后上升。

Sprinkler system can effectively control and extinguish initial fire,therefore the response time of the whole system becomes the significant element to the fire extinction. A random sampling simulation experiment was proceeded in accordance with Monte-Carlo method,and a sprinkler response time model was built which includes the influencing factors such as sprinkler response time index,fire growth rate,radial spacing between fire seat and sprinkler,vertical interval between fire seat and the roof. Finally a distribution character of response time was obtained through a mass of data analysis. The results indicated that the response time basically conforms to the lognormal distribution. The response time has a linear correlation with the sprinkler＇s response time index： it decrease with the increase of the fire growth rate,and increase with growth of the radial spacing,and decrease slightly and then increase again with the increase of the vertical interval.