Abstract
The blast formed by the burst of a high-pressure spherical container was analyzed using the Random-Choice method which can calculate propagation of a shock wave with sufficient accuracy. The explosion characteristic length on the basis of the internal energy of high pressure gas is used for the normalization with the Sachs' scale. However, many of explosions as an industrial disaster correspond to the burst of the container in the low explosion overpressure caused by deflagration, and, as for the accident evaluation based on the scale of Sachs, an error becomes large. The new characteristic length, Rankine Hugoniot scale, was proposed, and the blast curve was newly obtained. It converges and the quantitative evaluation of this blast curve becomes possible at many of actual explosion disasters. The scope of two scale rules was examined.
