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

  • Zhi-yi Zhang (张志틪)
  • Gong-xian Wang (王贡献)
  • Yu Wang (汪 玉)


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.

Key words

shock test machine underwater explosion (UNDEX) velocity generator shock pulse regulator 

CLC number

O 313 


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Copyright information

© Shanghai Jiaotong University and Springer-Verlag GmbH 2009

Authors and Affiliations

  • Zhi-yi Zhang (张志틪)
    • 1
  • Gong-xian Wang (王贡献)
    • 1
    • 2
  • Yu Wang (汪 玉)
    • 3
  1. 1.Institute of Vibration Shock and NoiseShanghai Jiaotong UniversityShanghaiChina
  2. 2.School of Logistics EngineeringWuhan University of TechnologyWuhanChina
  3. 3.Naval Arming AcademyBeijingChina

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