Component surface explosion load distribution rule analysis method

Abstract

The invention belongs to the technical field of weapon damage assessment, and particularly relates to a method for analyzing the distribution law of explosion loads on the surface of a steel member. The component surface explosion load distribution rule analysis method comprises the following specific steps: firstly, calculating the positive reflection peak pressure and the positive impulse of thecenter of an explosion facing surface; establishing a fitting formula of the positive reflection peak pressure and the positive impulse by utilizing a least square curve fitting method; determining acomponent surface distribution function; determining explosion load parameters of any point on the surface of the component; and combining the explosion load parameters of the central point of the component, namely explosion load reflection pressure P and impulse I, and determining the explosion load parameters of any point by utilizing the normalized distribution function sum, namely, after theexplosion load parameters of the surface of the component are determined by utilizing the method, performing evaluation analysis on the damage of the component by utilizing the obtained explosion loadparameters. The method has the advantages that the effect in the near-explosion explosion environment can be quickly and reliably calculated, and the like.

Description

technical field [0001] The invention belongs to the technical field of weapon damage assessment, and in particular relates to an analysis method for the distribution rule of explosion load on the surface of steel components. Background technique [0002] How to determine the blast load on the structure surface is the key to structural damage assessment and response analysis. The usual method is to use the empirical formula established by the field explosion test data, but due to the safety and economic reasons of the test, the test data is very small, and most of the empirical formulas are only applicable to the infinite surface of the structure, and this assumption does not apply to a single structure with a finite width. Not applicable. If you continue to use this type of formula to predict the load on the surface of the structure, it will cause a large deviation, which will seriously affect the development of damage assessment. [0003] At present, most of the blast load...

AI Technical Summary

Problems solved by technology

The usual method is to use the empirical formula established by the field explosion test data, but due to the safety and economical reasons of the test, the test data is very small, and most of the empirical formulas are only applicable to the infinite surface of the structure, and this assumption does not apply to a single structure with a finite width. Not applicable, if you continue to use this type of formula to predict the load on the surface of the structure, it will cause a large deviation, which seriously affects the development of damage assessment

[0003] At present, most of the explosion load prediction formulas and charts have two common problems: (1) they all assume that when the blast wave interacts with the structure, the reflection surface is infinite, and some of the formulas and charts are even large-scale wall tests on site. (2) The coupling between explosion and structure is not considered, so it is not suitable for explosion load analysis in the process of structural failure

Using this explosion load for the study of the dynamic response and failure mechanism of building structures or components under explosion loads or the anti-blast design of building structures will lead to erroneous research results and uneconomical designs

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