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Effects of Free Heave Motion on Wave Forces on Two Side-by-Side Boxes in Close Proximity Under Wave Actions

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Abstract

Wave forces on two side-by-side boxes in close proximity under wave actions were analyzed using the OpenFOAM package. The upstream box heaved freely under wave actions, whereas the downstream box remained fixed. For comparison, a configuration in which both boxes were fixed was also considered. The effects of the heave motion of the upstream box on the wave loads, including the horizontal wave forces, vertical wave forces, and moments on the boxes, were the focus of this study. Numerical analyses showed that all frequencies at which the maximum horizontal wave forces, maximum vertical wave forces, and maximum moment appeared are dependent on the heave motion of the upstream box and that the effects of the heave motion on these frequencies are different. Furthermore, these frequencies were observed to deviate from the corresponding fluid resonant frequency. Moreover, the heave motion of the upstream box reduced the wave forces acting on both boxes and altered the variation trends of the wave forces with the incident wave frequency.

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Authors and Affiliations

  1. School of Naval Architecture and Ocean Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212100, China

    Zhi-wei He, Jun-liang Gao & Qian Liu

  2. Centre for Infrastructure, Geotechnical and Water Engineering (IGWE), Department of Architecture and Civil Engineering, University of Bath, Bath, BA2 7AY, UK

    Jun Zang

  3. School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin, 132012, China

    Hong-zhou Chen

  4. College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing, 210098, China

    Gang Wang

Authors
  1. Zhi-wei He
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  2. Jun-liang Gao
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  3. Jun Zang
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  4. Hong-zhou Chen
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  5. Qian Liu
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  6. Gang Wang
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Correspondence to Jun-liang Gao.

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This research is financially supported by the National Key Research and Development Program (Grant No. 2017YFC1404200), the National Natural Science Foundation of China (Grant Nos. 51911530205 and 51809039), the Natural Science Foundation of Jiangsu Province (Grant No. BK20201455), the Natural Science Foundation of the Jiangsu Higher Education Institutions (Grant No. 20KJD170005) and the Qing Lan Project of Jiangsu Universities. This work is also partially supported by UK EPSRC (Grant No. EP/T026782/1), the Royal Academy of Engineering (Grant No. UK-CIAPP/73) and the Royal Society (Grant No. IEC\NSFC\181321).

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He, Zw., Gao, Jl., Zang, J. et al. Effects of Free Heave Motion on Wave Forces on Two Side-by-Side Boxes in Close Proximity Under Wave Actions. China Ocean Eng 35, 490–503 (2021). https://doi.org/10.1007/s13344-021-0045-9

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  • DOI: https://doi.org/10.1007/s13344-021-0045-9

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