浅析FDS火灾模拟与应用

Analysis on Fire Simulation and Application Based on FDS

FDS(Fire Dynamics Simulator)是火灾模拟中的一个重要软件。它根据建筑和火灾的特性,通过对火灾场景的模拟,以简单直观的形式动态显示出火灾发生的全过程,并在计算过程中获得较准确的火灾相关参数,如温度场分布,烟气流动及热辐射等。基于FDS软件的使用,在设定火灾发生场景时,主要包括空间尺寸的定义、网格划分、模拟时间的设定、火源设置、障碍物的设定及其边界条件等。该软件采用先进的大涡流模拟技术,在时间和空间的预测上具有二阶精度,得到众多实例的验证,在建筑结构和火灾安全工程领域应用十分广泛。

Based on the field simulation program FDS（Fire Dynamics Simulator） is a major fire simulation software. According to the characteristics of a building and fire and through simulating the fire scene, the whole fire process is displayed dynamically in a simple and intuitive form, and some fire-related parameters are obtained, such as the temperature distribution, the smoke gas flow, the thermal radiation and so on. Based on the FDS software, the setting of the fire scene mainly includes： the space size, meshing grids, simulation time, fire resource, obstacles, boundary conditions and so on. By using the advanced simulation technology of big swirl, the software has the second-order accuracy in time and space, it is verified by a great number of samples, and applied in the building structure and fire safety engineering fields.