Simplified calculation method for terrorist explosion shock wave characteristic parameters

Abstract

The invention relates to a simplified calculation method for terrorist explosion shock wave characteristic parameters. Firstly, it is assumed that an explosive device with the explosive load being W kg TNT equivalent explodes on the ground which is R meters away from the center of a building orifice, wherein the ambient atmospheric pressure is P0, the air density is rho0, the volume of the orificestructure is V0, the volume of the building structure is V, the pressure of shock waves entering the building structure from the orifice structure is uniformly distributed, and the shock wave characteristic parameters comprise shock wave uniform distribution pressure delta PC, positive pressure action time tau + C and average positive pressure impulse IC; and then an explosion simulation test iscarried out, and data fitting is adopted to obtain a calculation formula of an average value of explosion shock wave parameters entering the building structure from any orifice structure when the conventional weapons with different equivalents explode at any position outside the building structure. According to the method, the characteristic parameters of the shock waves entering the building fromthe orifice structure can be rapidly and accurately calculated, and the method is of great significance to damage evaluation and protection evaluation of the interior of the orifice structure.

Description

technical field [0001] The invention relates to a calculation method of a shock wave, which is used for calculating the characteristic parameters of the shock wave inside a building with an orifice structure when a terrorist explosion occurs outside the building, in particular to a simplified calculation method for the characteristic parameters of the shock wave of the terrorist explosion. Background technique [0002] The orifice structure refers to engineering structures with orifices, including various protective engineering structures with orifices and civil buildings with orifices such as doors, windows, ventilation, and communications in terrorist explosions. [0003] In recent years, violent and terrorist attacks have occurred frequently all over the world and have become a cancer that endangers national security and social stability. Shock wave is the main damage factor of terrorist explosion. At present, all countries in the world attach great importance to terrori...

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Problems solved by technology

However, the existing related research mainly focuses on the distribution of blast waves in streets and buildings, and the research on the distribution characteristics of blast shock waves entering buildings through damaged doors and windows has not been published so far. There is no suitable calculation method available for the distribution characteristics of the shock wave entering the structure through the mouth

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