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Acta Armamentarii ›› 2024, Vol. 45 ›› Issue (4): 1297-1310.doi: 10.12382/bgxb.2022.1255

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Study on Similarity and Equivalent Design Method of Steel Plate Targets with Different Materials Based on Modified Compensation Model

ZHANG Jianwei, WU Ziqi*(), ZHANG Fengchao, XING Chengcheng, MENG Fanxing   

  1. NORINCO Group Air Ammunition Research Institute Co., Ltd., Harbin 150001, Heilongjiang, China
  • Received:2022-12-08 Online:2024-04-30
  • Contact: WU Ziqi

Abstract:

The penetration test of ship plate frame structure is often used to assess the penetration ability of projectile into ship. Due to the high purchasing and processing costs of special steel, it is necessary to carry out research on the similarity law and material equivalent method of projectile penetrating into metal target plate. The similarity of the residual velocities of three kinds of projectiles during vertical penetration into steel plates made of different materials is studied based on the similarity theory. The dimensionless residual velocities are expressed as the function of dimensionless plate thickness and dimensionless dynamic yield stress of target plate. The correction and compensation model method is applied for the different materials of model and the prototype target plates. A similarity design method is established to achieve the same residual velocity as the prototype by changing the thickness of model plate,And the equivalent coefficients of two materials is obtained through the fitting of numerically simulated results, which are 0.5047 for blunt-nosed projectiles, 0.3943 for pointed nose projectiles, and 0.3845 for truncated-oval-shaped projectiles.

Key words: armor piercing mechanics, penetration, similarity theory, correction and compensation model, material equivalence

CLC Number: