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Twenty-Third Symposium on Naval Hydrodynamics (2001) / Chapter Skim
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Ship Stability Study in the Coastal Region: New Coastal Wave Model Coupled with a Dynamic Stability Model
Pages 983-992

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From page 983...
... In coastal regions, the major source function, nonlinear wave-wave interactions significantly increase as water depth decreases, significantly reducing the fetch limit, causing the wind generated waves to grow faster and steeper than in the deep ocean. Coast region wave dynamics are further complicated by the very low frequency waves, such as, edge waves, bottom topographic waves, as well as solitons etc.
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From page 984...
... Dynamic stability assessments of surface ships usually rely on the standard equilibrium deep sea spectra, such as JONSWAP, Pierson-Moskowitz, Neumann, Fisher and Roll, Darbyshire gravity wave spectra, etc. All these spectra formulations are proportional to W-5, where w is intrinsic frequency.
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From page 985...
... is greater than the tidal current (E-W, 0.2 meters) , but the tidal current and its associated water depth variation still significantly effect the wave height and wave periods.
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From page 986...
... New coastal wave model significant wave height for St. Lawrence River and Gulf.
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From page 987...
... Haidvogal et al (1991) pointed out that due to the free wave frequency of Fieberling Guyot is equivalent to the forced frequency, significant seamount trapped waves occur.
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From page 988...
... Bottom topography of Fieberling Guyot. u`~o, t-~' a~n's~ ;< bare ~~, 1.
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From page 989...
... The coast trapped waves and seamount trapped waves often occur and can cause ships to capsize. Furthermore, the nonlinear wave-wave interactions are order of magnitude increase with water depth decreases.
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From page 990...
... Capsize off naval frigate passing over the seamount.
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From page 991...
... and R.-Q. Lin, " Relating Nonlinear Energy Cascades to Wind Input and Wave Breaking Dissipation".
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From page 992...
... current velocity has c signif c mt influence on wave teepening effects This effect Held be highest when the current opposes She wind Ed wave dinection; presumably for this study the tidal cunent runs in east we t du ection et Nat location, although it isnotq iteclearfiomfigure 10 Iffhecunentw re to run et m oblique Ogle with respect to She incoming wave system, His would result m shortcrested wa ves clove the seam ount The program FRdDYN does not account for wavecunent Interaction Ed uses She principle of Imear superposition of wave components in deep water conditions Would the mthors recommend further erJkmcement to the simulation model to account for shallow water or certain nonlinear .. 3 ve effects?
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Key Terms

  • dynamic stability
  • coastal wave
  • deep water
  • shallow water
  • water depth

  • deep ocean
  • wave height
  • stability model
  • fieberling guyot
  • bottom topography

  • tidal current
  • stability assessments
  • naval frigate
  • trapped waves
  • significant wave

  • pacific ocean
  • wave frequency
  • free wave
  • current distribution
  • north pacific

  • eastern north
  • wave realization
  • seamount trapped
  • time domain
  • capsize predictions

  • lawrence river
  • grow faster
  • saint lawrence
  • wave period
  • littoral regions


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