Wave Forces on Pile Including Diffraction and Viscous Effects

by Subrata K. Chakrabarti, (M.ASCE), Head, Analytical Group; Marine Res. and Development, Chicago Bridge and Iron Co., Plainfield, IL,

Serial Information: Journal of the Hydraulics Division, 1973, Vol. 99, Issue 8, Pg. 1219-1233

Document Type: Journal Paper


Linearized Navier-Stokes equation, including the linear viscous terms, is considered in the investigation of the oscillatory wave forces on a vertical circular cylindrical structure. Stokes' nonlinear gravity wave theory is applied in the analysis and expressions for the wave pressures and forces on the cylinder are derived. The effect of diffraction of waves due to the presence of the cylindrical object is included in the derivation. The relative importance of the higher order terms in the nonlinear wave components and the viscous terms is shown. The theory is compared with past test results on the inertia-predominant wave forces on a vertical cylindrical pile.

Subject Headings: Nonlinear waves | Gravity waves | Wave forces | Piles | Wave diffraction | Linear functions | Navier-Stokes equations | Vertical loads

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