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Buckling Properties of Water-Drop-Shaped Pressure Hulls with Various Shape Indices Under Hydrostatic External Pressure

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Abstract

The water-drop-shaped pressure hull has a good streamline, which has good application prospect in the underwater observatory. Therefore, this study conducted analytical, experimental and numerical investigation of the buckling properties of water-drop-shaped pressure hulls under hydrostatic pressure. A water-drop experiment was conducted to design water-drop-shaped pressure hulls with various shape indices. The critical loads for the water-drop-shaped pressure hulls were resolved by using Mushtari’s formula. Several numerical simulations including linear buckling analysis and nonlinear buckling analysis including eigenmode imperfections were performed. The results indicated that the critical loads resolved by Mushtari’s formula were in good agreement with the linear buckling loads from the numerical simulations. This formula can be extended to estimate the buckling capacity of water-drop-shaped pressure hulls. In addition, three groups of pressure hulls were fabricated by using stereolithography, a rapid prototyping technique. Subsequently, three groups of the pressure hulls were subjected to ultrasonic measurements, optical scanning, hydrostatic testing and numerical analysis. The experimental results were consistent with the numerical results. The results indicate that the sharp end of the water-drop-shaped pressure hulls exhibited instability compared with the blunt end. This paper provides a new solution to the limitations of experimental studies on the water-drop-shaped pressure hulls as well as a new configuration and evaluation method for underwater observatories.

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Authors and Affiliations

  1. School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China

    Xiao-de Ding, Jian Zhang & Ming-lu Wang

  2. Shanghai Engineering Research Center of Marine Renewable Energy, College of Engineering Science and Technology, Shanghai Ocean University, Shanghai, 201306, China

    Fang Wang

  3. China Ship Scientific Research Center, Wuxi, 214082, China

    Hui-feng Jiao

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  1. Xiao-de Ding
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  2. Jian Zhang
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  5. Ming-lu Wang
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Correspondence to Jian Zhang.

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Foundation item: This study was financially supported by the National Natural Science Foundation of China (Grant Nos. 52071160 and 52071203) and the 333-Key-Industry Talent Project of Jiangsu Scientific Committee (Grant No. JTO 2022-21).

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Ding, Xd., Zhang, J., Wang, F. et al. Buckling Properties of Water-Drop-Shaped Pressure Hulls with Various Shape Indices Under Hydrostatic External Pressure. China Ocean Eng 38, 1–17 (2024). https://doi.org/10.1007/s13344-024-0001-6

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  • DOI: https://doi.org/10.1007/s13344-024-0001-6

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