In order to build a quiet and comfortable ship, the noise legels on board ship must be predicted at early design stage. Statistical Energy Analysis developed by R.H. Lyon has been well known to be most useful frame work to study the energy flow of noise and vibration in structures. Authors applied this theory to predict noise and vibration levels of accomodation quarters in merchant ships and have developed the computer program. It is assumed that both air-and structure-borne noise are able to hold and carry the noise energy. Components constructing cabins such as floors, walls, linings and air-cubes (acoustic fields) etc. have been all considered as SEA elements. To examine the accuracy of program, experiments were carried out on merchant ships with a tappingmachine as a noise source. About 600 data for each ship were measured and converted from Acc. Level to Sound Temperature Level (STL) for easy understanding of the direction of noise energy flow. The result of comparison between the calculated and measured data have shown good agreements. Namely, the difference between them lies primarily within plus/minus 3 dB (80 % of airborne noise).
Noise prediction program on board ship - application of statistical energy analysis
Programm zur Ermittlung des Geraeusches an Bord von Schiffen Anwendung der statistischen Energieanalyse
Titel japanisch
Journal of the Society of Naval Architects of Japan ; 56 , 150 ; 564-575
1981
12 Seiten, 13 Bilder, 1 Tabelle, 24 Quellen
Article (Journal)
Japanese
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