Method for determining explosion load of internal double-explosion-source firework factory building structure

Abstract

The invention discloses a method for determining the explosion load of an internal double-explosion-source firework factory building structure. The method comprises the following steps: (1) determining the explosion load (including the average reflection pressure and the average reflection impulse of each wall) of two explosion sources when the two explosion sources explode independently in the firework factory building structure; and (2) carrying out region division on each wall surface of the structure, superposing the two explosion loads calculated in the step (1) to obtain the total average reflection pressure and the total average reflection impulse of each wall surface, and multiplying the total average reflection pressure and the total average reflection impulse by the enhancement coefficient of each region of each wall surface of the structure disclosed by the invention to obtain the explosion load of each region of each wall surface of the structure. According to the method, the phenomenon that the internal double-explosion-source explosion load is extremely non-uniformly distributed in the structure is considered, and the explosion load of the internal double-explosion-source explosion load is more accurately determined. The method is simple and convenient to calculate, and saves a large amount of time cost, and has good engineering practical application value.

Description

technical field [0001] The invention relates to a method for determining the explosion load of a fireworks factory building structure, in particular to a method for determining the explosion load of a fireworks factory building structure with internal double explosion sources. Background technique [0002] There are two commonly used determination methods for explosion load, one is to determine by reference to the code; the other is to use explicit dynamic analysis software for numerical simulation determination. The above two methods have many deficiencies when they are applied to determine the explosion load of the internal dual-explosion source fireworks factory building. According to relevant codes, when determining the explosion load in a single explosion source explosion, it is assumed that the explosion load is evenly distributed along the walls of the structure. When determining the load equivalent to a single explosion source, there is a great inaccuracy, and there...

AI Technical Summary

Problems solved by technology

According to relevant codes, when determining the explosion load in a single explosion source explosion, it is assumed that the explosion load is evenly distributed along the walls of the structure. When determining the load equivalent to a single explosion source, there is a great inaccuracy, and there is a great safety hazard in the local peak area of ​​the actual explosion load

Explicit dynamic analysis software can be used to accurately calculate the explosion load, but the fluid-solid coupling algorithm takes a long time, and the software operation requires high requirements for non-professionals

Therefore, the above two methods are not pertinent when determining the explosion load of internal double explosion sources, and it is difficult to apply them in engineering practice.

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