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Wave, Current and Wind Loads

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Springer Handbook of Ocean Engineering

Part of the book series: Springer Handbooks ((SHB))

Abstract

This chapter describes wave, current, and wind loads on fixed or floating offshore platforms. Both linear and nonlinear waves are discussed in deterministic and irregular seas. Linear waves are written as a subset of the more general wave theory based on the perturbation method. Nonlinear waves include Stokes waves in deep waters and cnoidal and solitary waves in shallow waters. Wave loads on both large and slender structures are formulated, and solution methods, such as the Green function method, are introduced. For large structures, linear potential theory is formulated in the frequency domain. However, time-domain methods and drift loads are also discussed. For slender structures, Morison’s equation and the associated drag and inertia coefficients are introduced.

These are followed by wave–current interaction, many types of uniform and nonuniform currents, wave–current kinematics, and current-induced forces, as well as vortex-induced vibrations. A number of important quantities, such as the Doppler shift, velocity estimation through the power law, lift and drag coefficients are also introduced.

Wind forces on offshore structures are discussed through both the steady and unsteady wind profiles and forces, and through spectral analysis. Other considerations include sections on model tests and similarity laws and how various physical quantities can be scaled to prototype, both commercial and open-source computational fluid dynamics (GlossaryTerm

CFD

) tools, and extreme response estimation.

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Abbreviations

3-D:

three-dimensional

CFD:

Computational Fluid Dynamics

computational fluid dynamics

FEM:

finite element method

FORM:

first-order reliability method

GFM:

Green function method

KC:

Keulegan–Carpenter

MGSVA:

Mariano Global Surface Velocity Analysis

P–M:

Pierson–Moskowitz

RANS:

Reynolds-averaged Navier–Stokes equation

RAO:

response amplitude operator

RMS:

root mean square

TLP:

tension leg platform

VIM:

vortex-induced motion

VIV:

vortex-induced vibration

VLFS:

very large floating structure

WEC:

wave energy conversion

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Authors and Affiliations

  1. Dep. Ocean & Resources Engineering, University of Hawaii at Manoa, 2540 Dole Street, Holmes Hall 402, HI 96822, Honolulu, Hawaii, USA

    R. Cengiz Ertekin

  2. Rodenbusch Consulting, 213 Heather Hills Drive, TX 78620, Dripping Springs, Texas, USA

    George Rodenbusch

Authors
  1. R. Cengiz Ertekin
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  2. George Rodenbusch
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Correspondence to R. Cengiz Ertekin .

Editor information

Editors and Affiliations

  1. The Inst. for Ocean and Systems Engineering – SeaTech, Florida Atlantic University, 101 North Beach Road, FL 33004, Dania Beach, Florida, USA

    Manhar R. Dhanak

  2. School of Naval Architecture & Marine Engineering, University of New Orleans, 2000 Lakeshore Drive, LA 70148, New Orleans, Louisiana, USA

    Nikolaos I. Xiros

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Ertekin, R.C., Rodenbusch, G. (2016). Wave, Current and Wind Loads. In: Dhanak, M.R., Xiros, N.I. (eds) Springer Handbook of Ocean Engineering. Springer Handbooks. Springer, Cham. https://doi.org/10.1007/978-3-319-16649-0_35

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  • DOI: https://doi.org/10.1007/978-3-319-16649-0_35

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