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首页> 外文期刊>Journal of offshore mechanics and arctic engineering >Benchmarking of a Computational Fluid Dynamics-Based Numerical Wave Tank for Studying Wave Load Effects on Fixed and Floating Offshore Structures
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Benchmarking of a Computational Fluid Dynamics-Based Numerical Wave Tank for Studying Wave Load Effects on Fixed and Floating Offshore Structures

机译：基于计算流体力学的数值波箱的基准测试，以研究波浪载荷对固定和浮动海上结构的影响

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摘要

A computational fluid dynamics (CFD) based numerical wave tank (NWT) is developed and verified to study wave load effects on fixed and free floating offshore structures. The model is based on solving Navier-Stokes equations on a structured grid, level set method for tracking the free surface, and an immersed boundary method for studying wave-structure interaction. This paper deals with establishing and verifying a CFD- based NWT. Various concerns that arise during this establishment are discussed, namely effects of wave reflection which might affect the structure response, damping of waves in downstream, and three-dimensional (3D) effects of the waves. A method is described and verified to predict the time when incoming waves from wave generator are affected by reflecting waves from the structure which can help in better designing the dimensions of NWT. The model is then used to study sway, heave, and roll responses of a floating barge which is nonuniform in density and limited in sway direction by a spring and damper. Also, it is used to study wave loads on a fixed, large diameter, surface piercing circular cylinder. The numerical results are compared with the experimental and other numerical results, and in general veiy good agreement is observed in all range of studied wave fre- quencies. It is shown that for the studied fixed cylinder, the Morison equation leads to promising results for wavelength to diameter ratio larger than 2π (kD
机译：开发并验证了一种基于计算流体动力学（CFD）的数值波浪储罐（NWT），以研究波浪载荷对固定和自由浮动海上结构的影响。该模型基于求解结构化网格上的Navier-Stokes方程，用于跟踪自由表面的水平集方法以及用于研究波结构相互作用的沉浸边界方法。本文涉及建立和验证基于CFD的NWT。讨论了在此建立过程中出现的各种问题，即可能影响结构响应的波反射效应，下游波的阻尼以及波的三维（3D）效应。描述并验证了一种方法，该方法可预测来自波发生器的入射波受到结构反射的波影响的时间，这有助于更好地设计NWT的尺寸。然后，该模型用于研究浮动驳船的摇摆，升沉和侧倾响应，该浮船的密度不均匀，并且在摇摆方向上受弹簧和减震器限制。此外，它还用于研究固定的，大直径，表面可穿透的圆柱体上的波浪载荷。将数值结果与实验和其他数值结果进行了比较，并且在所有研究的频率范围内总体上都观察到很好的一致性。结果表明，对于所研究的固定圆柱体，Morison方程对于大于2π的波长与直径之比（kD

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  • 来源
    《Journal of offshore mechanics and arctic engineering》 |2017年第3期|031301.1-031301.11|共11页
  • 作者

    All Nematbakhsh; Zhen Gao; Torgeir Moan;

  • 作者单位

    Mem. ASME Centre for Ships and Ocean Structures,Department of Marine Technology,Norwegian University of Science and Technology,Trondheim NO-7491, Norway;

    Professor Centre for Ships and Ocean Structures;

    Centre for Autonomous Marine Operations and Systems,Department of Marine Technology,Norwegian University of Science and Technology Trondheim NO-7491, Norway;

    Professor Centre for Ships and Ocean Structures, Centre for Autonomous Marine Operations and Systems,Department of Marine Technology,Norwegian University of Science and Technology,Trondheim NO-7491, Norway;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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