Accession Number : AD0751133

Title :   Wave Damping Effects of Fibrous Screens: Hydraulic Model Investigation.

Descriptive Note : Final research rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Keulegan,Garbis H.

Report Date : SEP 1972

Pagination or Media Count : 108

Abstract : Expressions are derived for the damping of essentially translatory waves by screens prepared from fibrous materials such as aluminum wool, rubberized hair, and polyurethane foam. The derivations involve either the resistance coefficients or the permeabilities of these materials and these are individually determined. It is found that with the aluminum wool the damping is exponential and yields expressions admitting logarithmic decrements. A comparison is made with the Biesel theory of decay in porous media. With the foams the damping is also exponential; on the other hand, with the rubberized hair the damping is best described in terms of a power formula. (Author)

Descriptors :   (*BREAKWATERS, HYDRAULIC MODELS), (*WATER WAVES, DAMPING), OCEAN WAVES, EQUATIONS OF MOTION, HARBORS, CONSTRUCTION MATERIALS, WAVE PROPAGATION, REFLECTION

Subject Categories : Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE