The vibration of floating ships is considerably affected by the surrounding sea water. Today, it is current practice to include the so-called hydrodynamic masses in a simulation model by adding them to the structural mass of the vessel. The hydrodynamic masses represent the effect of the inertia of the water on the ship's hull. The compressibility of the water (i.e. underwater noise radiation) is neglected due to high computational effort and low availability of appropriate simulation codes. A fast multilevel multipole boundary element method program has been developed to solve the Helmholtz equation, which allows the computation of the sound pressure field in the water due to a structural velocity field on the hull surface. These pressure results are compared with pressure distributions including only the hydrodynamic mass effect to estimate the influence of both underwater noise radiation and inertia of the water on structural vibration
The effect of underwater noise radiation on ship vibration
2007
2 Seiten, 5 Bilder, 3 Quellen
Conference paper
Storage medium
English
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