Vehicle sheet shock wave damage equivalent target and equivalent experiment method

Abstract

The invention discloses a vehicle sheet shock wave damage equivalent target and an equivalent experiment method. The disclosed vehicle sheet shock wave damage equivalent target is a circular plate equivalent target determined based on equivalent fundamental frequency, geometric parameters of a vehicle sheet and material parameters. According to the equivalent experiment method, the deformation mapping relation between a prototype vehicle thin plate and an equivalent target structure is determined through an impact dynamics simulation method, and then deformation of an original vehicle thin plate is determined through the mapping relation between the prototype vehicle thin plate and the equivalent target structure according to impact wave damage deformation of an equivalent target. Based onthe fundamental frequency of the vehicle thin plate, the shock wave damage equivalent target with similar deformation can be rapidly designed, the equivalent relation of deformation is given, the design efficiency of the equivalent target is improved, and the test cost of the vehicle thin plate 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 an equivalent target for shock wave damage of a thin plate of a vehicle. Background technique [0002] The vehicle is a common target in the explosion damage effect test. In the explosion force field, the blast surface of the vehicle target mainly includes metal sheet parts such as the door outer panel, fuel tank and driver's cab. By analyzing the damage of each component sheet, it can be indirectly characterized The destructive power of ammunition. [0003] 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 vehicle targets deployed in the shooting range test are mainly scrapped vehicles, whose damage stability is poor, and most of the damage modes cannot be reprodu...

AI Technical Summary

Problems solved by technology

However, at present, the vehicle targets deployed in the shooting range test are mainly scrapped vehicles, whose damage stability is poor, and most of the damage modes cannot be reproduced; while the deployment of brand-new vehicle targets can meet the stability requirements, but the test cost is high and cannot be supported. A large number of tests; and considering the complex boundary constraints of vehicle sheets (vehicle sheets refer to thinner metal structures in vehicles, generally referring to fuel tanks, cab doors, cab bodies, tool boxes, etc.), although equal-sized Design the equivalent target of the vehicle thin plate, but the boundary constraint of the thin plate is difficult to simulate realistically, so the designed equivalent target cannot truly simulate the damage characteristics of the vehicle thin plate

[0004] At present, there is a lack of shock wave damage equivalent target design methods related to vehicle thin plates. The existing shock wave damage equivalent target design methods mainly focus on ship cabin structures. An equivalent target design method for marine steel plates is given in "Research on Effective Targets", but this method does not consider the influence of the real boundary of the ship on the deformation of the steel plate; the patented technology "An Equivalent Test Model for Explosion Effects in the Ship's Cabin" An equivalent method for the explosion effect of ship cabin structures is given. Although this method can be applied to the damage equivalent target design of typical structures, some model parameters in the given design method need to be given artificially, which reduces the effectiveness of the method. Applicability and versatility, cannot be used for equivalent design of vehicle sheet

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