
Accession Number : AD0644183
Title : THE SECONDORDER THEORY OF CYLINDERS OSCILLATING VERTICALLY IN A FREE SURFACE.
Descriptive Note : Technical rept.,
Corporate Author : CALIFORNIA UNIV BERKELEY COLL OF ENGINEERING
Personal Author(s) : Lee,Choung Mook
Report Date : SEP 1966
Pagination or Media Count : 155
Abstract : Let a cylinder be half submerged with its generators parallel to the water surface, and suppose it to be symmetric about a vertical axis. Further suppose the cylinder to be oscillating harmonically in a vertical direction. The pressure distribution about the cylinder, the force acting upon it, and the waves generated by it are computed through the second order of a perturbation series in the ratio of amplitude of motion to beam. The resulting potentialtheory problems are solved by placing singularities of all orders at the intersection of the water surface with the vertical axis of symmetry and determining their strengths from the boundary condition on the body. Numerical computations are made for a circular cylinder and for a Ushaped cylinder. The results are presented in graphs. (Author)
Descriptors : (*SHIPS, OSCILLATION), (*CYLINDRICAL BODIES, OSCILLATION), THEORY, FORCE(MECHANICS), PERTURBATION THEORY, POTENTIAL THEORY, NUMERICAL ANALYSIS, WATER WAVES, FLUID DYNAMICS
Subject Categories : Marine Engineering
Fluid Mechanics
Distribution Statement : APPROVED FOR PUBLIC RELEASE