Research on Dynamic Response of Pre-cracked Target Plate Subjected to Underwater Shock Wave

doi:10.3969/j.issn.1000-1093.2019.11.009

Abstract

Abstract: The ship structure is inevitable to be scratched, grooved or damaged in the processes of manufacturing and use, which may reduce the damage-resistant capability of ship structure to some extend. An equivalent underwater explosion impact loading device was used for the impact experiments on the pre-cracked target plate, and the deformation of target plate was recorded by using high-speed camera. The dynamic response mechanism of the pre-cracked plate under underwater impact load was studied through experiment and ABAQUS simulations, and the “three-stage” dynamic response result was acquired. The results show that the dynamic responses of target plates which have pre-cracks with different shapes are different in the final failure stage. The target plates tend to release all the energy with fewest cracks. The crack parameters are studied. The displacement of pre-cracked target plate has approximately linear relationship with the loading impulse. With the increase in the crack depth or length, the residual impact resistance of target plate decreases.Key

Key words: pre-cracktargetplate, underwaterexplosion, shockwave, finiteelement

CLC Number:

O383⁺.1

WEI Huiyang， RONG Jili， WEI Zhenqian， XIANG Dalin， HE Xuan， ZHAO Zitong. Research on Dynamic Response of Pre-cracked Target Plate Subjected to Underwater Shock Wave[J]. Acta Armamentarii, 2019, 40(11): 2250-2258.

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第40卷
第11期2019 年11月兵工学报ACTA
ARMAMENTARIIVol.40No.11Nov.2019

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