The objective of very low noise levels in passenger accommodations on board of MDV 1200 PEGASUS ONE fast ferry, made necessary a great effort in considering and applying acoustic solutions that could join together the necessity of low weight and high efficiency. Since the design definition, preliminary calculations of the expected airborne noise levels were done, considering the noise and vibration contributions of the internal sources (propulsion, auxiliary machines, conditioning and ventilation, gas exhaust etc.). This allowed: the assessment of the critical component and propagation paths, the evaluation of the noise requirements on the machinery/equipment, the definition of necessary performances of the acoustic treatments. During the ship construction, an extensive program of test was conducted in order to acquire data and improve the reliability of the noise calculations and in order to optimise the characteristics and the extension of the treatments. The measurements were mainly connected to: the noise propagation along different ship structure, the dynamic behaviour of the main foundations, the radiation on the passenger areas, the assessment of the performances of the selected treatments and to the machinery noise and vibration measurements during shop tests. Lastly, in the sea acceptance test, noise and vibration levels were measured in all the ship spaces to check the compliance with the requirements; very satisfactory results were achieved. The paper will review the approach to the ship silencing from the design phase to the results at sea.
Low noise levels are compatible with high speed? The experience of Fincantieri on Pegasus One fast ferry
Sind niedrige Lärmpegel mit hoher Geschwindigkeit vereinbar? Erfahrungen von Fincantieri mit der Pegasus-One-Schnellfähre
NAV & HSMV International Conference, 1997 ; HSM ; 8-27
1997
13 Seiten, 7 Bilder, 1 Tabelle, 5 Quellen
Conference paper
English
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