Abstract: In order to improve the scientific and accurate prediction of the explosion shock wave overpressure of chemical storage tanks, TNT equivalent method, TNO Multi-Energy method and Baker-Strehlow model were used to predict the explosion shock wave overpressure of typical LPG storage tanks. The differences and deviations of the three models were analyzed. According to the spatial layout of the storage tank area and the LPG explosion limit range, TNT equivalent value of actual explosive material was fixed. The ANSYS numerical model of LPG tank explosion was established for verification. The results showed that in the explosion scenario of LPG storage tank area in this paper, the actual TNT equivalent value of LPG involved in explosion after correction was 5 130.25 kg. On this basis, the prediction deviation of TNT equivalent method was far less than that of the three empirical models of explosion shock wave overpressure, and the prediction deviation of the far field and far field overpressure was basically less than 10%, which reduced the prediction error of the empirical model to a certain extent and realized the scientific prediction of explosion shock wave overpressure. The research results can provide reference for the prevention and control of explosion accidents and the construction of safety protection projects in chemical gathering areas.

Key words: LPG storage tank, shock wave overpressure, TNT equivalent method