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Numerical modeling of dual-pulse shock test machine for simulating underwater explosion shock loads on warship equipments

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Abstract

In order to qualify shock resistance performance of shipboard equipments and simulate real underwater explosion environment, a novel dual-pulse shock test machine is proposed. The new machine will increase testing capability and meet special shock testing requirement. Two key parts of the machine, the velocity generator and the shock pulse regulator, play an important role in producing the positive acceleration pulse and the succeeding negative acceleration pulse, respectively. The generated dual-pulse shock for test articles is in conformity with an anti-shock test specification. Based on the impact theory, a nonlinear dynamic model of the hydraulically-actuated test machine is established with thorough analysis on its mechanism that involves conversion of gas potential energy and dissipation of kinetic energy. Simulation results have demonstrated that the proposed machine is able to produce a double-pulse acceleration shock in the time domain or a desired shock response spectrum in the frequency domain, which sets up a base for the construction of the machine.

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Authors and Affiliations

  1. Institute of Vibration Shock and Noise, Shanghai Jiaotong University, Shanghai, 200240, China

    Zhi-yi Zhang  (张志틪) & Gong-xian Wang  (王贡献)

  2. School of Logistics Engineering, Wuhan University of Technology, Wuhan, 430063, China

    Gong-xian Wang  (王贡献)

  3. Naval Arming Academy, Beijing, 100073, China

    Yu Wang  (汪 玉)

Authors
  1. Zhi-yi Zhang  (张志틪)
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  2. Gong-xian Wang  (王贡献)
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  3. Yu Wang  (汪 玉)
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Correspondence to Zhi-yi Zhang  (张志틪).

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Zhang, Zy., Wang, Gx. & Wang, Y. Numerical modeling of dual-pulse shock test machine for simulating underwater explosion shock loads on warship equipments. J. Shanghai Jiaotong Univ. (Sci.) 14, 233–240 (2009). https://doi.org/10.1007/s12204-009-0233-x

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  • DOI: https://doi.org/10.1007/s12204-009-0233-x

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