Accession Number : AD0757147

Title :   Wave Transmission through Rock Structures. Hydraulic Model Investigation.

Descriptive Note : Final rept.,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Keulegan,Garbis H.

Report Date : FEB 1973

Pagination or Media Count : 79

Abstract : Application of the energy method leads to a theoretical expression of the coefficient of transmission through a prismatic structure, constructed from rocks of uniform size, for long waves traversing the structure. When the dissipation in the voids is due partly to turbulent forces, the transmissions are expressed by a power formula. The formula is modified by a parametric factor to respond to the conditions met with in the ordinary model studies of the shorter waves. The factor form is determined from observations made with waves of varying periods. The relation of the adapted formula to the resistance of the structures for steady flow is shown. With the reflections not being amenable to an analytical treatment, test results are consolidated in a single curve, irrespective of the rock sizes, with the porosity remaining constant. (Author)

Descriptors :   (*BREAKWATERS, WAVE PROPAGATION), (*HYDRAULIC MODELS, BREAKWATERS), MODEL TESTS, OCEAN WAVES, REFLECTION, FLOW FIELDS, EQUATIONS OF MOTION, WATER WAVES

Subject Categories : Civil Engineering

Distribution Statement : APPROVED FOR PUBLIC RELEASE