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Container side wall shock wave damage equivalent target and equivalent experiment method

An experimental method and container technology, applied in the field of explosion damage test, can solve the problems of poor stability of damage effect, uneven original state of target, high test cost, etc., to improve deformation equivalence and stability, reduce test cost and implement The effect of controllable difficulty and processing technology

Active Publication Date: 2020-11-24
XIAN MODERN CHEM RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the container targets deployed in the shooting range test are mainly scrapped containers. The original state of the targets is uneven. However, the test cost is too high to support a large number of tests; and considering the large geometric size of the container structure, if the container side wall structure is designed with the same size method, the boundary constraints of the side wall and other container structures will be limited The method is difficult to simulate realistically, so that the designed equivalent target cannot effectively simulate the damage characteristics of the container side wall
[0003] The prior art "Study on the Damage Effect of the Equivalent Target of the Shelter by Explosion Shock Wave" discloses an equivalent target design method for the shelter structure. The thickness of the wall plate of the prototype shelter is equivalent by the method of equal stiffness, and the equivalent size of the shelter is designed. Shelter target, but did not propose a single-component target design method considering the boundary, and the designed equal-sized target significantly increased the cost of the test

Method used

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  • Container side wall shock wave damage equivalent target and equivalent experiment method
  • Container side wall shock wave damage equivalent target and equivalent experiment method
  • Container side wall shock wave damage equivalent target and equivalent experiment method

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Experimental program
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Embodiment 1

[0041] Such as figure 1 As shown, the geometric shape of a standard container structure is a cuboid with a size of 6.0m×2.6m×2.4m. The main geometric parameters include the side wall (1), the front and rear end walls are 2mm thick corrugated steel plates, and the top plate is 1.5mm thick Corrugated steel plate; the column (160mm×160mm) and the top beam (100mm×150mm) are 4.5mm thick rectangular section hollow steel; the bottom side beam is 6mm thick [section steel (60mm×160mm), the bottom beam is 4.5mm thick The [section steel (45mm×120mm), the steel material is Q235, the modulus of elasticity is 210MPa, Poisson’s ratio is 0.3, and the material density is 7850kg / m 3 , the yield strength is 235MPa;

[0042] The quasi-equivalent side wall is a corrugated steel plate of L(6.0m)×a(2.6m);

[0043] A finite element model of the container structure is established, and the fundamental frequency of the side wall (1) structure is obtained through simulation calculation to be 7.278Hz; ...

Embodiment 2

[0047] Establish a finite element model of an equivalent target based on the above parameters;

[0048] Through LS-DYNA, the impact deformation simulation analysis of the side wall and the combined equivalent target structure is carried out separately, and the shock wave pressure acting on the surface of the thin plate structure is set according to the fragility of the side wall structure and the deformation characteristics of the surrounding fixed circular thin plate structure The range of reflected load impulse is 1MPa.ms -1 ~3.5MPa.ms -1 , the explosion shock wave load is set by the LOAD_BLAST_ENHANCED keyword during the simulation. After the simulation is completed, the impulse load I and residual deformation (y 0 、y e1 and y e2 ), the residual deflection deformation of the combined equivalent target according to the formula y e =(2y e1 +y e2 ) / 3 to get it. Fit the deformation of the side wall structure with the shock wave pressure data to obtain the relationship be...

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Abstract

The invention discloses a container side wall shock wave damage equivalent target and equivalent experiment method. The equivalent target is a circular plate equivalent target designed based on geometric parameters, material parameters and structural fundamental frequencies of a container structure. The equivalent experiment method comprises the steps of building a deformation mapping relation between a prototype container side wall and the combined equivalent target by an impact dynamic simulation method based on the equivalent target, and then determining deformation of the original side wall by adopting the mapping relation between the prototype container side wall and the combined equivalent target according to shock wave damage deformation of the equivalent target. The shock wave damage combined equivalent target with similar deformation is designed based on the base frequency of the container side wall, the equivalent target is simple in structure and convenient to use, and the experiment cost is reduced.

Description

technical field [0001] The invention belongs to the field of explosion damage tests, and in particular relates to a method for designing a shock wave damage combination equivalent target for a container side wall structure. Background technique [0002] The container is a common target in the explosion damage effect test. Considering the large force-bearing area of ​​the side wall structure of the container, the side wall is usually facing the detonation center to characterize the surface load damage effect in the far field of the explosion of large ammunition. As a target for evaluating the power of ammunition, the test requires the target to have stable deformation properties, which is convenient for comparing the damage capabilities of different ammunition. However, at present, the container targets deployed in the shooting range test are mainly scrapped containers. The original state of the targets is uneven. However, the test cost is too high to support a large number ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F41J1/01
CPCF41J1/01
Inventor 毛伯永魏巍焦文俊张玉磊苏健军
Owner XIAN MODERN CHEM RES INST
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