Control of Diesel Induced Shipboard Noise by the Use of Isolation Mounts

摘要

Vibration isolation mounting is critical to shipboard noise control, particularly on diesel driven vessels. This paper assesses methods used to design and select isolation mounts and to predict mount transmission loss, or difference in the vibration level above and below the mount. Isolation mounting of propulsion diesels and gensets will be considered for both single and double stage mount systems. The importance of airborne flanking of the mount system itself and the importance of "secondary" (or airborne coupled) stuctureborne transmission paths will be explained. Predicted and measured mount transmission losses are examined along with the expected airborne and structureborne noise associated with isolation mounted diesel systems.