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Acta Armamentarii ›› 2017, Vol. 38 ›› Issue (1): 143-150.doi: 10.3969/j.issn.1000-1093.2017.01.019

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Numerical Simulation on Inside Load Characteristics of Broadside Cabin of Defensive Structure Subjected to Underwater Contact Explosion

WU Lin-jie1, HOU Hai-liang1, ZHU Xi1, CHEN Peng-yu1, KAN Yu-long2   

  1. (1.Department of Naval Architecture Engineering, Naval University of Engineering, Wuhan 430033, Hubei, China; 2.Equipment Department, Unit 91832 of Naval, Beihai 536000, Guangxi, China)
  • Received:2016-03-07 Revised:2016-03-07 Online:2017-03-03

Abstract: The inside load characteristics of broadside cabin of defensive structure subjected to underwater contact explosion is researched. The interaction between underwater explosion bubble and broadside empty cabin at the time when is three fold of the first pulsation period of underwater explosion bubble and the inside load characteristics of broadside empty cabin are numerically analyzed by using LS_DYNA software. The model experiment is performed to validate the creditability of simulation results and analysis. The research shows that the blast gas flows into or out the broadside empty cabin from the plate crevasss along with bubble expansion or contraction, and the broadside plate is sunken or upheaved at the same time. The broadside empty cabin is separated by plate petals into two regions, and the load in the front of plate petals is different from that in the back of plate petals. If the largest plate damage is evaluated by using finite element method, the calculation time could be just 5% of the first pulsation period of underwater explosion bubble.Key

Key words: ordnancescienceandtechnology, underwaterexplosion, defensivestructure, loadcharacteristics, bubble, numericalsimulation

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