Influence of venting areas on the air blast pressure inside tubular structures like railway carriages

J Hazard Mater. 2010 Nov 15;183(1-3):839-46. doi: 10.1016/j.jhazmat.2010.07.103. Epub 2010 Aug 3.


In case of a terrorist bomb attack the influence and efficiency of venting areas in tubular structures like train carriages is of interest. The pressure-time function of an air blast wave resulting from a solid charge is first compared to that of a gas or dust explosion and the capability of a venting structure to fly away is assessed. Several calculations using fluid-structure interaction are performed, which show that after a certain distance from the explosion, the air blast wave inside a tubular structure becomes one-dimensional, and that the influence of venting areas parallel to the wave propagation direction is small. The pressure peak and the impulse at certain points in a tubular structure are compared for several opening sizes. The overall influence of realistic size venting devices remains moderate and their usefulness in mitigating internal explosion effects in trains is discussed.

MeSH terms

  • Air Pressure*
  • Blast Injuries / etiology
  • Blast Injuries / prevention & control
  • Explosions*
  • Humans
  • Railroads*
  • Terrorism