基于FDS的大型仓库电缆火灾数值模拟研究

Research on Numerical Simulation of Large Warehouse Cable Fire Based on FDS

建筑火灾是我国当前最突出的火灾问题之一,而大型空间在发生火灾时的安全性是广泛被关注的问题。由于大型空间底部埋设较多电缆,容易引起着火,而空间内可燃物多,人员密集,一旦发生火灾,势必造成很大的财产损失和人员伤亡。由于在火灾发生的过程中,室内火灾形成的高温对空间内的横梁结构产生很大的影响,有可能发生部分或整体的垮塌,严重威胁人民的生命财产安全,因此对大型空间在发生火灾时的安全性研究成为当下较为重要的研究课题。主要工作为:(1)使用美国国家标准研究所开发的专业火灾模拟软件FDS(Fire Dynamics Simulator)对有横梁结构的大型房间(仓库)的火灾场景进行了数学建模,并对其模拟的适用性进行了论证;(2)使用FDS进行了有横梁结构的大型空间(仓库)火灾的模拟,对热释放速率及温升过程进行了分析研究;(3)使用FDS对有横梁结构的大型空间(仓库)火灾的蔓延进行了数值模拟和研究总结。

Building fire is one of the most prominent fire problems in our country,and the safety of large-scale spaces in the event of a fire is a matter of widespread concern.Since many cables are buried at the bottom of a large space,it is easy to cause a fire,and there are many combustibles in the space and crowded people.Once a fire occurs,it will inevitably cause great property losses and casualties.In the course of a fire,the high temperature formed by the indoor fire has a great impact on the beam structure in the space,and partial or overall collapse may occur,which seriously threatens the lives and properties of the people.Therefore,research on the safety of large spaces in the event of a fire has become a more important research topic.The main work of this paper is:(1)Use the professional fire simulation software FDS(Fire Dynamics Simulator)developed by the American National Standards Institute to mathematically model the fire scene of a large room(warehouse)with a beam structure,and demonstrate the applicability of its simulation;(2)FDS was used to simulate the fire in a large space(warehouse)with a beam structure,and the heat release rate and temperature rise process were analyzed and studied;(3)Use FDS to numerically simulate and research the spread of fire in a large space(warehouse)with beam structure.