HOME

Science and Technology of Energetic Materials

Vol.72, No.6 (2011)

Research paper

Blast pressure distribution around a wall
Tomotaka Homae, Kunihiko Wakabayashi, Tomoharu Matsumura, and Yoshio Nakayama
p.155-160

Abstract

Blast pressure distribution around a wall for protection is evaluated. The relation between the azimuth angle, distance, and blast parameters, such as peak pressure and positive impulse, was examined. A cylindrical pentaerythritol tetranitrate (PETN) pellet of 1.4g was put on a paper box, whose height was 15mm, was detonated on a steel plate. A model wall, whose height, width and thickness was 63mm, 104mm, and 6.0mm, respectively, was placed at 60mm from the charge. The distance measured in scaled distance from 5.4m•kg-1/3 to 21.7m•kg-1/3. The direction measured in angles from 0°to 180°, where 0°was defined as a vertical from the PETN pellet to the wall plane. The peak pressure was extremely mitigated at the direction of 30°, while it was slightly enlarged at the direction of ranging from 120°to 150°. The impulse was mitigated at direction of less than 90°, especially at 40°and 50°, while it was enlarged at direction of more than 90°. The area enclosed by the isobaric line of scaled impulse moved to the direction of 180°.

> Full text (Open access*)

Keywords

explosive, blast pressure, wall, mitigation, distribution

© Copyright 1999-2017 Japan Explosives Society. All right reserved.