Added Mass of an Oscillating Hemisphere at Very-Low and Very-High Frequencies

[+] Author and Article Information
Mario A. Storti, Jorge D’Elı́a

Centro Internacional de Métodos Computacionales en Ingenierı́a (CIMEC) INTEC, UNL-CONICET. Güemes 3450, 3000-Santa Fe, Argentina


e-mail: cimec@ceride.gov.ar

Telephone: +54 342 4556673; Fax: +54 342 4550944

J. Fluids Eng 126(6), 1048-1053 (Mar 11, 2005) (6 pages) doi:10.1115/1.1839932 History: Received October 15, 2003; Revised August 05, 2004; Online March 11, 2005
Copyright © 2004 by ASME
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The load extension h=sin φ sin θ sign{cos θ} for the surge-mode at Very High Frequencies (VHF) (ω→∞)
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The load extension h=sin φ sin θ for the surge-mode at Very Low Frequencies (VLF) (ω→0)
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Antisymmetrical load extension h=cos θ for the heave-mode at very-high frequencies ω→∞
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Symmetrical load extension h=|cos θ| for the heave-mode at very-low frequencies ω→0
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The surge load h(θ,φ)=sin φ sin θ, with 0≤φ<2π and 0≤θ<π/2
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The heave load h(θ,φ)=cos θ, with 0≤θ≤π/2
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Cartesian coordinates (x,y,z) and spherical ones (r,θ,φ)
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Geometrical description of a seakeeping-like flow: Original problem (left) and extended to the upper plane (right)
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Sketch of the movement of an incompressible fluid in shiplike vibration due to a heave motion




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