Gas explosion is a highly destructive form of disaster, and it seriously threatens the safety of structures and personnel. The reduction and mitigation measures of gas explosions have been extensively investigated, such as blast walls, safety gaps, and inert gases. Among these numerous measures, how to select the most economical, feasible, and effective measure to reduce the consequences of gas explosions is one of the most important problems faced by decision-makers. Therefore, a CFD-based analytic hierarchy process–Technique for Order Preference by Similarity to an Ideal Solution (AHP-TOPSIS) decision-making model was developed in this study. It combines the subjective experiences of decision-makers with the objective results of CFD numerical simulations, which makes the selected measure more reasonable and effective. The selection of mitigation measures for gas explosion overpressures in the UUT was taken as an example to verify the effectiveness of the proposed decision-making model. Three effective measures proposed in this study (i.e., = 10 m, = 300 μm, = 10 m – = 400 μm) were evaluated using the CFD software Flame Acceleration Simulator (FLACS) and used as target decision measures for the model. The results of the CFD-based AHP-TOPSIS decision-making model show that the measure of = 10 m – = 400 μm is the most appropriate mitigation measure for gas explosion overpressures in the UUT under the evaluation index system, including feasibility, effectiveness, and economy. The results will support the selection of the appropriate overpressure mitigation measure of gas explosions and the blast-resistant design of UUTs.

中文翻译：

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基于CFD的地下综合管廊瓦斯爆炸超压缓解措施AHP-TOPSIS决策模型

瓦斯爆炸是一种破坏性极大的灾害，严重威胁建筑物和人员的安全。人们对减少和缓解瓦斯爆炸的措施进行了广泛的研究，例如防爆墙、安全间隙和惰性气体。在众多的措施中，如何选择最经济、可行、有效的措施来减轻瓦斯爆炸后果，是决策者面临的最重要的问题之一。因此，本研究开发了一种基于CFD的层次分析法——理想解相似排序技术（AHP-TOPSIS）决策模型。它将决策者的主观经验与CFD数值模拟的客观结果相结合，使得所选择的措施更加合理有效。以UUT内瓦斯爆炸超压缓解措施选择为例，验证了所提决策模型的有效性。使用CFD软件火焰加速模拟器（FLACS）对本研究中提出的三种有效措施（即= 10 m、= 300 μm、= 10 m – = 400 μm）进行了评估，并将其用作模型的目标决策措施。基于CFD的AHP-TOPSIS决策模型结果表明，在可行性、有效性、和经济。研究结果将支持选择适当的瓦斯爆炸超压缓解措施和 UUT 的防爆设计。