THE PREDICTION OF NOISE PROPAGATION ONBOARD SUPERYACHT

In recent years, the main parameter that designers have to consider during a megayacht project has shifted from speed to human comfort on board, in order to fulfil owners’ requirements. Thus the assessment of level of noise and vibration has become necessary tasks that have to be carried out even during the early design stages, when modifications in the structural layout and/or in the insulation plans can be accomplished with low working times and costs. Moreover, Classification Societies are developing stricter rules in terms of NVH, by fixing new limit values for vibration velocities and sound pressure level (SPL) especially for super and megayacht. The prediction of noise propagation, especially in the mid-high frequency range, cannot be assessed by using deterministic approach such as the finite element method, but it must be solved by a statistical based approach, the so called Statistical Energy Analysis. In this paper, the study of the noise propagation onboard a superyacht built by Italian shipyard “Cerri Cantieri Navali” has been assessed by using the SEA software VaOne. Particular attention has been devoted to the structural borne noise radiated by laminated glasses, that are more and more largely used in super and megayachts.