Equivalent Method for 921A Steel and Q345 Steel Target Plates Based on Plate Thickness Compensation Model under thePenetration of Truncated-oval Nose Projectile

doi:10.3969/j.issn.1000-1093.2021.11.020

Abstract

Abstract: The special shipbuilding steel is expensive and its test cost is high for the test of projectile penetrating into the ship target. Thus the equivalence of replacing shipbuilding steel with ordinary shipbuilding steel is studied to determine the equivalent relationship between different target plates.Based on the equivalent principle of residual velocity，the dimensional analysis method and compensation model are used，and a design formula for material equivalent engineering based on the compensation model is proposed. In the formula, the ratio of equivalent plate thickness to prototype plate thickness and the ratio of equivalent plate yield strength to prototype plate yield strength meet the power exponent relation， and the power exponent coefficient needs to be determined by experiment or simulation. The process of truncated oval projectile vertically penetrating into the 921A steel and Q345 steel target plates was simulated using finite element analysis software LS-DYNA. The result shows that the calculated results are in good agreement with the test results，thus verifying the correctness of the numerical simulation method.The empirical formula for the equivalent plate thickness and the dynamic yield strength of two target plates is presented by fitting the calculated equivalent plate thickness, and the validity of the compensation model formula is verified.

Key words: shiptargetplate, truncatedogiveprojectile, projectilepenetration, materialequivalence, compensationmodel

CLC Number:

TJ012.4

WANG Yinan， ZHANG Jianwei， WANG Zhi， YAO Xiongliang， YANG Nana. Equivalent Method for 921A Steel and Q345 Steel Target Plates Based on Plate Thickness Compensation Model under thePenetration of Truncated-oval Nose Projectile[J]. Acta Armamentarii, 2021, 42(11): 2465-2475.

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