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Volume 36 Issue 3
May. 2022
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Chinese Journal of High Pressure Physics  > 2022  >  36(3): 035102.
ZHANG Chi, LI Haitao, MEI Zhiyuan, LI Jiebing, ZHENG Xinying. Effects of Typical Structural Parameters on Underwater Explosion Resistance of Girders[J]. Chinese Journal of High Pressure Physics, 2022, 36(3): 035102. doi: 10.11858/gywlxb.20210881
Citation: ZHANG Chi, LI Haitao, MEI Zhiyuan, LI Jiebing, ZHENG Xinying. Effects of Typical Structural Parameters on Underwater Explosion Resistance of Girders[J]. Chinese Journal of High Pressure Physics, 2022, 36(3): 035102. doi: 10.11858/gywlxb.20210881
shu

Effects of Typical Structural Parameters on Underwater Explosion Resistance of Girders

doi: 10.11858/gywlxb.20210881
  • 1.

    College of Naval Architecture and Ocean, Naval University of Engineering, Wuhan 430033, Hubei, China

  • 2.

    Navy Unit No. 91251, Shanghai 200940, China

  • Received Date: 27 Sep 2021
  • Rev Recd Date: 29 Oct 2021
  • Accepted Date: 20 Dec 2021
  • Issue Publish Date: 30 May 2022
    Abstract
  • In order to improve the design level of anti-explosion capability of protective structure of ships, it is necessary to reveal the influence of changes in typical structural parameters of ships on their damage characteristics. The trapezoidal cross-section girder, of which the size and structural characteristics are close to those of a typical military ship the real ship is designed. The underwater explosion load of each calculation condition is obtained by using Geers-Hunter theoretical formula. Based on ABAQUS finite element numerical analysis method, the structural response characteristics of the girders with different parameters such as length, outer plate thickness, depth and width subjected to underwater explosion were compared and analyzed. A dimensionless structural strength factor that can characterize the influence of each typical structural parameter on the overall structural strength of the girder is proposed. The results show that the coupling between bubble pulsation and structure natural frequency leads to sagging deformation when the pulse duration of bubble is close to the natural frequency of the girder. The increase in the length causes the reduction in bending resistance of the structure. The initial hogging deformation increases slowly and the maximum sagging deformation increases significantly; the increase in the outer plate thickness, depth and width lead to the decrease in the initial hogging deformation and maximum sagging deformation of the structure during the response. The initial hogging deformation is less sensitive to the change of structural parameters than the maximum sagging deformation. The dimensionless structural strength factor proposed in the paper can characterize the overall strength of the girder structure.

     

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