抄録
In this study, reference functions were derived for the relationship between the mass-scaled distance (Z) and the negative-phase blast wave parameters, including the negative peak overpressure (P-), scaled negative impulse (I-), and scaled negative duration (T-). A blast wave was generated in field experiments using a right cylindrical cast trinitrotoluene (TNT) charge with a weight of 16.16-160 kg and a burst scaled height of approximately 0.18 m･kg-1/3. Each pressure profile was measured using piezoelectric pressure sensors installed at a height of 1 m in the range of 2.53- 148.9 m･kg-1/3. The blast parameters were corrected for ambient pressure and temperature. Additionally, P- and I- were fitted using an equation inversely proportional to Z, while T- was assumed to be constant with respect to Z, and a constant was derived. Compared to the surface explosion of hemispherical TNT, P- and I- were similar, whereas T- was larger.
