In the past, numerous damages related to internal steel-work of fluid carrying vessels, caused by propeller and propulsive installation generated excitations, were reported. During studies aimed at solving the problems, it has been stated that there is a remarkable lack of one of the most important parameters, the so-called virtual mass of water playing a vital role in steel-work vibrations. This paper concerns the elastic free vibration characteristic of the square cantilever plate submerged in water, considered one of the principal problems related to steel-work vibrations. Various effects on the added virtual mass of water, such as aspect ratio, partial submergence, perforation, flange attached at free edge, etc., are investigated by an analytical approach and the finite element method with liquid elements. Comparison of these numerical results with experimentally measured data of model tests shows that there are fairly good correlations among them. Finally, simplified formulas for estimating the natural frequency of the cantilever plate in water are derived. Application areas include vibrations in water of rudders, propeller blades, and other ship appendages. (Wassmann)
Elastic vibration of cantilever plate submerged in water
Elastische Schwingung einer in Wasser getauchten Kragplatte
Ishikawajima-Harima Engineering Review ; 20 , 3 ; 129-135
1980
7 Seiten, 13 Bilder, 1 Tabelle, 9 Quellen
Aufsatz (Zeitschrift)
Japanisch
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