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Method for calculating initial velocity of explosive collapse fragments of reinforced concrete target plate

A reinforced concrete, initial velocity technology, applied in the field of explosion damage assessment, can solve the problem that there is no definite calculation method for the average initial velocity of concrete fragments, and achieve the effects of reducing the number of tests, simplifying the calculation process, and simplifying the experimental procedures

Active Publication Date: 2019-05-21
INST OF DEFENSE ENG ACADEMY OF MILITARY SCI PLA CHINA
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Problems solved by technology

At present, there is no definite calculation method for the average initial velocity of the concrete fragments produced by the reinforced concrete target plate under the blast load

Method used

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  • Method for calculating initial velocity of explosive collapse fragments of reinforced concrete target plate
  • Method for calculating initial velocity of explosive collapse fragments of reinforced concrete target plate
  • Method for calculating initial velocity of explosive collapse fragments of reinforced concrete target plate

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Embodiment

[0025] A method for calculating the initial velocity of fragments collapsed by an explosion of a reinforced concrete target plate, comprising the following steps:

[0026] Step 1: Carry out dimensional analysis on the physical and mechanical parameters that affect the explosion and shock collapse of the reinforced concrete target plate. The dimension L represents the length in meters, T represents the time in seconds, and M represents the mass in kilograms to establish concrete fragments Functional relation for average initial velocity:

[0027] V=f(H h , f t , ρ, C t , C) (1)

[0028] The physical and mechanical parameters include: the initial velocity V of concrete fragments, whose dimension is L T -1 ; The distance H between the charge center and the lower surface of the target plate h , whose dimension is L; the tensile strength of the target plate material f t , whose dimension is ML -1 T -2 ; Target plate density ρ, its dimension is ML -3 ; Elastic wave velocity...

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Abstract

The invention relates to a method for calculating the initial velocity of explosive collapse fragments of a reinforced concrete target plate, which is a calculation method obtained by carrying out dimension analysis on physical quantities influencing the initial velocity of the fragments and fitting initial velocity data of the fragments generated by the concrete target plate under the action of an explosive load obtained by a test. The method has the beneficial effects that a method of combining dimension analysis and test is adopted, the calculation process is simple and accurate, a calculation formula can be corrected according to test data and different requirements, guidance can be provided for later-stage tests on the basis of early-stage tests, experiment programs are simplified, and the number of times of tests is reduced.

Description

technical field [0001] The invention relates to an explosion damage assessment technology, in particular to a method for calculating the initial velocity of a reinforced concrete target plate exploded and collapsed fragments. Background technique [0002] In military engineering or civil engineering, reinforced concrete structures are relatively common engineering structures. In the event of an accidental explosion, the brittleness of concrete determines the reality that a large number of concrete fragments will be generated. In order to avoid such debris from causing damage to personnel and equipment, it is necessary to estimate the initial velocity of concrete debris, so as to formulate corresponding protective measures. At present, there is no definite calculation method for the average initial velocity of the concrete fragments produced by the reinforced concrete target plate under the blast load. Contents of the invention [0003] The purpose of the present invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/10
Inventor 杨建超高伟亮孙桂娟王幸张磊王晓峰孔德锋徐翔云周松柏陈力
Owner INST OF DEFENSE ENG ACADEMY OF MILITARY SCI PLA CHINA
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