基于FDS模拟的充气膜内部火灾温度场分析

Study on the Fire Temperature Field Characteristics of Inflatable Membrane Structure Based on FDS Simulation

基于火灾燃烧模型理论,利用计算流体动力学软件FDS研究了典型充气膜结构的火灾温度场的分布特性,重点分析了单一火源在不同位置的膜面温度场分布.数值模拟结果表明,距离膜面较远的火源条件下,其空间纵向温度分布较均匀,而环向温度分布梯度相对较大;距离膜面较近的火源条件下,纵向和环向温度分布梯度都相对较小,温度相对较为均匀.这为人员安全疏散和进一步的结构力学性能研究提供了参考依据.

Based on the theoretical model of combustion, the fire temperature field distribution characteristics of typical inflatable membrane structure are investigated by use of a computational fluid dynamics software FDS. Temperature field distribution of the membrane surface under different fire scenarios is analyzed. Numerical simulation results show that the radial temperature distribution is relatively homogenous, and the circumferential temperature gradient changes greatly when the fire source is far from the membrane surface; however, when the membrane surface is close to the fire source, radial and circumferential temperature gradient are both relatively small, as well as the temperature filed is relatively homogenous. The results provide a significant reference for the safety evacuation and further structural design of fire resistant.