This paper deals with the virtual mass reduction factor J value of cylinders with circular, elliptical and rectangular sections respectively and revolution ellipsoids. The authors showed a close agreement between theoretical and experimental J values, and they discuss the effect of water depth, mode shape and various water boundary conditions on J values of a circular cylinder with experimental results. The main results are as follows: The authors' theoretical J values of circular and elliptical sectioned cylinders agree with the experimental ones. J values of beams with a rectangular section are less than J values of circular and elliptical-sectioned cylinders with the same aspect ratio of wetted section area. J values of a uniform beam are inclined to be larger if the wetted section area of the beam is flatter. The experimental J values for revolution ellipsoids are slightly less than Lewis' and the authors'. J values of a circular cylinder vibrating flexurally increases because of rigid walls or rigid cylinders in front and rear. (Wassmann)
A study on the virtual mass reduction factors J values for ship vibration
Eine Untersuchung der virtuellen Massenreduktionsfaktorbeiwerte J fuer die Schiffsschwingung
Hitachi Zosen. Technical Review ; 39 , 2 ; 50-57
1979
8 Seiten, 17 Bilder, 5 Tabellen, 13 Quellen
Article (Journal)
English
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