摘要
利用动态火灾模拟软件,通过仿真模拟试验,获得地铁站台典型区域的点型感烟火灾探测器对不同火源的报警响应时间,研究不同火源工况下站台区域点型感烟火灾探测器的响应性能,搭建简易模型进行实体试验。将2种试验方法获得的数据进行对比分析。试验结果显示:不同的火源类型、火源位置和火源功率对探测器的响应时间均有影响。其中,影响较大的因素是火源类型。油池火的实测报警时间与数值模拟的结果相对较吻合,而聚氨酯火和棉绳阴燃火的实测报警时间则明显长于数值模拟的报警时间。根据试验结果,建议应考虑适当减小探测器纵向间距并在关键区域增设探测器,并引入可视图像早期火灾报警系统以辅助火灾探测,提高地铁站台火灾自动报警系统的火灾响应性能。
By using dynamic fire simulation software and through simulation test,the alarm response times of the point smoke detectors in typical area on subway platform is obtained.At the same time,a simple and real model is built to study the response performance of the point smoke detector in different fire conditions.Then,a contrast test is carried out between two test results,which shows that different types of fire,different locations of fire and the power of the fire all have certain influence on the response time of the point type smoke detector,among them the types of fire are of great influence.This is verified by the alarm time of gasoline fire experimental data and numerical simulation time,while the alarm time of polyurethane fire and cotton smoldering fire is obviously longer.According to the experimental results,it is suggested that the longitudinal spacing of the detectors should be reduced and more detectors be added in the key areas.At the same time,visual image fire alarm system should be introduced in to assist the fire detection,in order to enhance the performance of automatic fire alarm system set on subway platform.
作者
庄永宁
ZHUANG Yongning(China Railway Siyuan Survey and De-sign Group Co. , Ltd. , 430063, Wuhan, Chin)
出处
《城市轨道交通研究》
北大核心
2018年第6期44-47,共4页
Urban Mass Transit
关键词
地铁站台
火灾探测器
响应性能
数值模拟
subway platform
fire detector
responseperformance
numerical simulation
