Calculation Method of Quasi-static Pressure of Blast Waves in Confined Chamber

Based on the limitation of quasi-static pressure calculation formulas at present, a formula in common use was proposed, and a determination method of unknown parameters was provided. Through the proposed method, the quasi-static pressures of 35g, 80g and 100g TNT sample were tested in a 500L confined chamber, by piezoelectricity pressure sensor, which was made by PCB corporation, then the quasi-static pressure calculation formula of TNT was fitted. Using the formula, the quasi-static pressures of 55g TNT and 90g TNT were calculated and compared to the test value. Two results agreed well, it indicated the determination method of unknown parameters in this paper is proper.