Ocean Systems Engineering

  • 제6권4호
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  • Pages.305-324
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  • 2016
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  • 2093-6702(pISSN)
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  • 2093-677X(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

The effect of small forward speed on prediction of wave loads in restricted water depth

  • Guha, Amitava (Marine Dynamics Laboratory, Department of Ocean Engineering, Texas A&M University) ;
  • Falzarano, Jeffrey (Marine Dynamics Laboratory, Department of Ocean Engineering, Texas A&M University)
  • 투고 : 2016.08.19
  • 심사 : 2016.10.14
  • 발행 : 2016.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Wave load prediction at zero forward speed using finite depth Green function is a well-established method regularly used in the offshore and marine industry. The forward speed approximation in deep water condition, although with limitations, is also found to be quite useful for engineering applications. However, analysis of vessels with forward speed in finite water depth still requires efficient computing methods. In this paper, a method for analysis of wave induced forces and corresponding motion on freely floating three-dimensional bodies with low to moderate forward speed is presented. A finite depth Green function is developed and incorporated in a 3D frequency domain potential flow based tool to allow consideration of finite (or shallow) water depth conditions. First order forces and moments and mean second order forces and moments in six degree of freedom are obtained. The effect of hull flare angle in predicting added resistance is incorporated. This implementation provides the unique capability of predicting added resistance in finite water depth with flare angle effect using a Green function approach. The results are validated using a half immersed sphere and S-175 ship. Finally, the effect of finite depth on a tanker with forward speed is presented.

키워드

과제정보

연구 과제 주관 기관 : Office of Naval Research

참고문헌

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피인용 문헌

  1. A more efficient numerical evaluation of the green function in finite water depth vol.7, pp.4, 2016, https://doi.org/10.12989/ose.2017.7.4.399
  2. Numerical Study on Change of Added Resistance due to Incident Waves in Finite Water Depth vol.145, pp.6, 2016, https://doi.org/10.1061/(asce)ww.1943-5460.0000526
  3. An optimization framework of a parametric Octabuoy semi-submersible design vol.12, pp.None, 2020, https://doi.org/10.1016/j.ijnaoe.2020.09.002