Numéro : 1982 - Year : 1985

Fluctuating hydrodynamic loads applied to a ship propeller

A. BOVIS, Ingénieur de l'Armement Chef de la Division Bruit- Propulsion
C.CRANCE, Ingénieur Civil
J. L. GUERMOND, Ingénieur Civil du Génie Maritime Bassin d'Essais des Carènes

Propellers are major sources of induced vibrations on ships when operating in the hull wake field. This paper presents a simple analytical formulation of the six components of unsteady forces and moments on propeller blades and hub due to the hydrodynamic loading.

A numerical procedure made possible to point out the influence of several pertinent parameters as aspect ratio or pitch distribution. The calculations have been correlated with experimental measurements using a six component dynamometer. The comparison shows a good agreement between calculated and measured unsteady loadings except in some cases when the wake evaluation is unsatisfactory for reliable estimations of the fluctuating forces on the propeller.

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