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Sensitivity Analysis of a Simplified fire Dynamic model

Journal of Civil Engineering and Architecture 2015年第6期9卷 652-664页

作者： Lars Schiott Sorensen Anker Nielsen Danish Building Research Institute Aalborg University Copenhagen DK-2450 Denmark

This paper discusses a method for performing a sensitivity analysis of parameters used in a simplified fire model for temperature estimates in the upper smoke layer during a fire. The results from the sensitivity analysis can be used when individual parameters affecting fire safety are assessed. If the variation of a single parameter is found to have a major impact on fire safety, it may be necessary to conservatively select this parameter in order to incorporate additional safety. We compare fire scenarios in rooms surrounded by lightweight as well as heavy walls in order to investigate which parameters are the most significant in each case. We apply the Sobol method, which is a quantitative method that gives the percentage of the total output variance that each parameter accounts for. The most important parameter is found to be the energy release rate that explains 92% of the uncertainty in the calculated results for the period before thermal penetration （te） has occurred. The analysis is also done for all combinations of two parameters in order to find the combination with the largest effect. The Sobol total for pairs had the highest value for the combination of energy release rate and area of opening, which explains 96% of the uncertainty. After thermal penetration, the energy release rate is still the most important parameter, but now only explains 49% of the variation. The second parameter is the thickness of the surface material, which explains 43%.

关键词： Sensitivity analysis fire model heavy walls lightweight walls fire-room geometry

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DIMZAL:A Software Tool to Compute Acceptable Safety Distance

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Open Journal of Forestry 2017年第1期7卷 11-33页

作者： Paul-Antoine Bisgambiglia Jean-Louis Rossi Romain Franceschini Francois-Joseph Chatelon Paul Antoine Bisgambiglia Lucile Rossi Thierry Marcelli University of Corsica CorteFrance

The scope of this work is to present a multidisciplinary study in order to propose a tool called DIMZAL. DIMZAL forecasts fuelbreak safety zone sizes. To evaluate a safety zone and to prevent injury, the Acceptable Safety Distance (ASD) between the fire and firefighters is required. This distance is usually set thanks to a general rule-of-thumb: it should be at least 4 times the maximum flame length. A common assumption considers an empirical relationship between fireline intensity and flame length. In the current work which follows on from an oral presentation held at the VII International Conference on Forest fire Research in Coimbra in 2014, an alternative way is proposed: a closed physical model is applied in order to quantize the ASD. This model is integrated in a software tool, which uses a simulation framework based on Discrete EVent system Specification formalism (DEVS), a 3D physical real-time model of surface fires developed at the University of Corsica and a mobile application based on a Google SDK to display the

关键词： Decision-Making Tool fire model Acceptable Safety Distance ASD Calculation Tool DEVS Mobile Application

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