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Boiling Liquid Expanding Vapour Explosions (BLEVEs) are extreme explosions driven by nonlinear physical processes associated with explosively expanded vapour and flashed liquid. Blast loading generated from BLEVEs may severely harm structures and people. Prediction of such strong explosions is not currently feasible using simple tools. Physics-based Computational Fluid Dynamics (CFD) methods are commonly utilized to predict the blast loading of BLEVE by going through many empirical formulas that map input variables to the target progressively. The calculation is often time-consuming, and it is therefore impractical to apply these methods to predict explosion loads from BLEVE in normal design analysis. Thinking of the composition of empirical relations in CFD models as a complex and nonlinear function, it is necessary to find an approximation of this function that can be efficiently calculated. The …