Accession Number : AD0705621

Title :   SCATTERING AND RADIATION OF WATER WAVES.

Descriptive Note : Final rept. 1966-1970,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE WATER RESOURCES AND HYDRODYNAMICS LAB

Personal Author(s) : Black,Jared L. ; Mei,Chiang C.

Report Date : APR 1970

Pagination or Media Count : 251

Abstract : Problems of scattering and radiation of water waves by rectangular or circular bodies are formulated within the framework of linearized potential theory. The objective is to find the far field wave amplitude due to radiation by a body oscillating in a prescribed manner or the disturbance caused by a body fixed in the path of an obliquely incident train of waves. The radiation results can be used in conjunction with Haskind's theorem to establish the forces (moment) an incident wave induces on a fixed body. Further, the radiation results are useful in establishing the damping coefficients associated with forced body oscillation. Specific results which are obtained are the complex reflection and transmission coefficients for two dimensional obstacles including the limiting cases of thin vertical barriers, thin surface strip, and submerged gap. Also the total and differential scattering cross-sections for vertical circular cylinders are presented. Radiated wave amplitudes are given for bodies oscillating in heave, sway, or roll, as well as the forces induced on fixed bodies by incident waves. Comparison with experimental and theoretical results by others is included. (Author)

Descriptors :   (*WATER WAVES, SCATTERING), HYDRODYNAMICS, INTEGRAL EQUATIONS, CYLINDRICAL BODIES, UNDERWATER OBJECTS, THESES

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE