In spite of the important progress made to predict noise level in ship accomodation, structure-borne sound transmission in ship structures remains one of the most important problems at the design stage of the ship. The purpose of this paper is to present a method to calculate the transfer between the vibratory power injected into the engine seating and the velocity level transmitted in the built-up late structure. A ship is an important steel structure made of coupled stiffened plates with structural discontinuities such as stiffeners, joints, and pillars. In order to predict the structure-borne transfer we use a smooth energy formulation for a two dimensional structure with cylindrical waves propagation. In this study we take into account flexural waves in the plate and each type of discontinuity is characterized in terms of reflection and transmission coefficients. The velocity level transmitted in the built-up plate structure is then calculated taking into consideration the driving-point mobility of the receiving plate obtained with a numerical prediction.
Energy method applied to structure-borne transfer in ship structures
Energiemethode angewendet auf Körperschallübergänge in Schiffsaufbauten
1996
4 Seiten, 4 Bilder, 4 Quellen
Conference paper
English
Ship-Borne Transfer Alignment under Low Maneuver
Trans Tech Publications | 2012
|Engineering Index Backfile | 1943
Engineering Index Backfile | 1942