火灾中闭式喷头响应时间的概率分布特性研究

喷淋系统中闭式喷头响应时间受火灾增长因子、径向安装距离和喷头响应时间指数等因素的影响。通过对喷头响应时间的模拟数据的统计分析,建立了包含火灾增长因子、径向距离和喷头响应时间指数等参数的喷头响应时间模型。考虑火灾增长因子和径向距离的随机性,获得了喷头响应时间的概率分布特性。研究结果表明,径向距离和火灾增长因子对喷头响应时间的分布特性影响显著。随着火灾增长因子的增大和径向距离的缩小,喷头在较短时间内响应的概率增大。随着径向距离的缩小,喷头响应时间指数对喷头响应时间分布的影响变小。研究可为优化喷头布置和评估喷头响应的有效性提供分析工具。

Probability Distribution of Response Time for Sprinkler Nozzle under Fire Condition

The response time of a sprinkler nozzle is affected by fire grow factor, installation radial distance, response time index and so on. In this paper, based on the statistical analysis of simulation data of sprinkler nozzle response time under fire condition, the parametric model of sprinkler nozzle response time which contained fire growth factor, radial distance and sprinkler response time index was established. The probability distribution of response time was obtained by considering the stochastic property of fire growth factor and radial distance. The results indicated that the probability distribution of sprinkler response time was significantly affected by fire growth factor and radial distance. As the radial distance reduced, the impact of the sprin- kler response time index on the distribution for sprinkler response time became smaller. Such methodology can be referred for assessing sprinkler performance and optimizing sprinkler nozzle installation.