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Dynamic buckling of stiffened plates subjected to explosion impact loads

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Abstract

The dynamic buckling characteristics and criteria of a ship’s structural stiffened plate subjected to underwater explosion impact loads are investigated in this study. Using the structural deformations observed in the experiments of underwater explosions against a plated grillage model, the mode shapes of the dynamic buckling were obtained. Through the construction of a computational model of stiffened plates subjected to an underwater explosion shock wave, the impact load was theoretically calculated and transformed into a rectangular pulse. According to the different response patterns of stiffened plates under different impact loads, a dynamic buckling criterion for the stiffened plates subjected to an explosion shock wave was proposed. Additionally, the static buckling phenomenon in the stiffened plates was analysed based on the minimum excess principle. In combination with the dynamic buckling criterion, the effects of various stiffening configurations on the dynamic and static buckling loads are discussed. The calculation results show that when the equivalent rectangular pulse is 2–3 times that of the static buckling load, the responses of the stiffened plates under the original shock load and the equivalent rectangular pulse are virtually identical. The impact load amplitude is the primary influencing factor in the dynamic buckling of stiffened plates subjected to underwater explosive impact loads. The stiffened plate aspect ratio has a substantial influence on the dynamic load factor. The analytical method and results are presented, which can be used to design stiffened optimum hull structures to enhance the dynamic load carrying capacity to withstand underwater shock damage.

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Acknowledgments

This study was supported by the “973” National Basic Research Project of China (613157), Key Project of the National Natural Science Foundation of China (50939002), and National Natural Science Foundation of China (51279038).

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Authors and Affiliations

  1. Wuhan Second Ship Design and Research Institute, Wuhan, 430064, China

    J. Wang

  2. College of Shipbuilding Engineering, Harbin Engineering University, Harbin, 150001, China

    J. Guo, X. L. Yao & A. M. Zhang

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  1. J. Wang
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  2. J. Guo
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  3. X. L. Yao
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  4. A. M. Zhang
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Correspondence to J. Guo.

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Communicated by C. Needham.

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Wang, J., Guo, J., Yao, X.L. et al. Dynamic buckling of stiffened plates subjected to explosion impact loads. Shock Waves 27, 37–52 (2017). https://doi.org/10.1007/s00193-016-0638-z

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  • DOI: https://doi.org/10.1007/s00193-016-0638-z

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