Title: Influence of venting areas in tubular structures like train carriages subjected to internal explosions
Citation: Proceedings of the First International Conference of Protective Structures
Publisher: The University of Manchester
Publication Year: 2010
JRC N°: JRC57030
URI: http://publications.jrc.ec.europa.eu/repository/handle/JRC57030
Type: Articles in periodicals and books
Abstract: The influence of venting areas built from glass on the peak pressure and the impulse of explosions due to high explosives is investigated in this paper. The pressure-time function of an air blast wave resulting from a high explosive is different from that of a gas or dust explosion. Its peak pressure is higher but the duration of the positive phase is much shorter. The capability of making a structure fly away is therefore reduced. Apart from the pressure time function also the direction of the wave could have an influence. Starting from a certain distance to the explosion, calculations show that the air blast wave inside a tubular structure becomes one-dimensional. In such a case, the influence of venting areas parallel to the wave propagation direction is small. This is shown in the study by several calculations using fluid-structure interaction. The pressure peak and the impulse at selected points in a tubular structure are compared depending on the existence of openings, their dimension and position, and their number. Their effect is found to be small even in the case that the opening is near the explosion. In addition, the influence of venting areas in realistic train carriages is presented.
JRC Directorate:Space, Security and Migration

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