Accession Number : AD0704298

Title :   RELATIVE EFFECT OF WAVES GENERATED BY LARGE SHIPS AND SMALL BOATS IN RESTRICTED WATERWAYS.

Descriptive Note : Final rept.,

Corporate Author : CALIFORNIA UNIV BERKELEY HYDRAULIC ENGINEERING LAB

Personal Author(s) : Das,M. M.

Report Date : NOV 1969

Pagination or Media Count : 123

Abstract : The peak wave energy in a system of waves resulting from the passage of a ship is important in engineering problems such as bank erosion, the motion of moored vessels, and forces on fixed and floating docks. With respect to bank erosion, the question often asked is whether the single passage of a large ship is more damaging than numerous passages of small pleasure craft. The study was conducted to determine the relative importance of the peak energy resulting from the passage of a cargo ship and a pleasure cruiser. The characteristics of the waves generated by these vessels moving at various speeds in deep and shallow water were determined from model studies. A numerical example is given in which prototype values of peak wave energy were predicted from the model data, and then ratios of the peak energies computed. The importance of ship speed is evident in these comparisons. (Author)

Descriptors :   (*SHIPS, *WATER WAVES), (*BOATS, WATER WAVES), HYDRODYNAMICS, INLAND WATERWAYS, HARBORS, EROSION, PIERS, FLOATING DOCKS, CARGO SHIPS, ENERGY, VELOCITY

Subject Categories : Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE