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The use of simulation in fire investigation

机译:模拟在火灾调查中的使用

摘要

Data from a full-scale test of temperature and smoke spread, in a realistic multi-room setting, was used to verify simulations done in the computer programs CFAST and FDS. A closely corresponding HRR-curve was used in the programs. It was found that data from the top 0,5m of the full-scale test could be compared with reasonable accuracy to both simulation models. This would make simulations, used in fire investigation, more easily comparable to real life cases as the highest temperatures in each room could be compared to a probable fire cause. The simulations were found to provide satisfying results in CFAST, as an alternative to FDS. With CFAST it was also found that close to a fire, in a geometrically complicated room, a more detailed model would be better suited. Outside the initial room the critical factor would be to cut down on the sections to as few as possible. A sensitivity analysis was performed with both programs for the quality of the work, and as example for future usage. A cone calorimeter test was performed on the ceiling, due to uncertainties about its possible contribution to the total fire load. Differences and similarities between the simulations and the full-scale test, as well as critical factors for success are discussed.
机译:在实际的多房间设置中,对温度和烟气扩散进行全面测试的数据用于验证在计算机程序CFAST和FDS中进行的模拟。程序中使用了非常接近的HRR曲线。结果发现,满量程测试顶部0.5m处的数据可以与两个仿真模型以合理的精度进行比较。由于可以将每个房间中的最高温度与可能的起火原因进行比较,这将使火灾调查中使用的模拟更容易与实际案例进行比较。发现该仿真在CFAST中提供了令人满意的结果,可以替代FDS。使用CFAST,还发现在几何复杂的房间中靠近火源的地方,更详细的模型更适合。在最初的房间之外,关键因素是将这些部分的数量减少到最少。两种程序均进行了敏感性分析,以确保工作质量,并作为将来使用的示例。由于不确定其对总着火负荷的影响,因此在天花板上进行了锥形量热仪测试。讨论了仿真与全面测试之间的异同,以及成功的关键因素。

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