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Oblique Wave-Induced Responses of A VLFS Edged with A Pair of Inclined Perforated Plates

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Abstract

This paper is concerned with the hydroelastic responses of a mat-like, rectangular very large floating structure (VLFS) edged with a pair of horizontal/inclined perforated anti-motion plates in the context of the direct coupling method. The updated Lagrangian formulae are applied to establish the equilibrium equations of the VLFS and the total potential formula is employed for fluids in the numerical model including the viscous effect of the perforated plates through the Darcy’s law. The hybrid finite element-boundary element (FE-BE) method is implemented to determine the response reduction of VLFS with attached perforated plates under various oblique incident waves. Also, the numerical solutions are validated against a series of experimental tests. The effectiveness of the attached perforated plates in reducing the deflections of the VLFS can be significantly improved by selecting the proper design parameters such as the porous parameter, submergence depth, plate width and inclination angle for the given sea conditions.

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Authors and Affiliations

  1. School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, China

    Yong Cheng & Chun-yan Ji

  2. Deepwater Engineering Research Center, Dalian University of Technology, Dalian, 116024, China

    Gang-jun Zhai

  3. Centre for Ships and Ocean Structures, Norwegian University of Science and Technology, NO-7491, Trondheim, Norway

    Gaidai Oleg

Authors
  1. Yong Cheng
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  2. Chun-yan Ji
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  3. Gang-jun Zhai
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  4. Gaidai Oleg
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Corresponding author

Correspondence to Yong Cheng.

Additional information

Foundation item: The work was financially supported by the National Natural Science Foundation of China (Grant Nos. 51490672, 51579122 and 51609109), the Natural Science Foundation of Jiangsu Province (Grant No. BK20160556), the University Natural Science Research Project of Jiangsu Province (Grant No. 16kjb70003) and the Key Lab Foundation for Advanced Manufacturing Technology of Jiangsu Province (Grant No. CJ1506).

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Cheng, Y., Ji, Cy., Zhai, Gj. et al. Oblique Wave-Induced Responses of A VLFS Edged with A Pair of Inclined Perforated Plates. China Ocean Eng 32, 14–25 (2018). https://doi.org/10.1007/s13344-018-0002-4

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  • DOI: https://doi.org/10.1007/s13344-018-0002-4

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