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Tuesday, July 9 • 12:10 - 12:30
ANALYSIS OF NOISE PREDICTION AND OUTFITTING MATERIAL SIMULATION OF HIGH-SPEED VESSEL

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The statistical energy analysis model of the cabin noise of the high speed vessel is established. The input power is determined according to equipment parameters of the main noise source such as the main engine and propeller. The influence of the two kinds of excitation constraints and acceleration constraints on prediction of sound pressure level in cabin is discussed. It is considered that the two forms of constraints on statistical energy analysis model are different in the high frequency. The calculated value under acceleration constraints is consistent with the trend of the spectrum curve of the experimental value. The influence of added water on cabin noise was analyzed. The added water leading the sound pressure level of cabin reduced by 6.4 dB(A), which cannot be ignored in noise prediction. According to different outfitting schemes of ships, numerical simulation of sound absorbing materials is carried out, and the simulation values of sound absorption coefficient and sound insulation index of cabin are obtained. The damping material is simulated, and the coupling loss factor is calculated according to the thickness ratio of the damping layer and the constraint layer. When damping material is applied at 1.5 times of plate thickness, the coupling loss factor at 1 kHz reaches the maximum of 0.21. Accurate simulation of outfitting materials provides conditions for improving cabin noise prediction accuracy.

Moderators
avatar for Tom Dakin

Tom Dakin

Sr. Staff Scientist, acoustics program, Ocean Networks Canada
IU

Ildar Urazghildiiev

Senior Research Engineer, JASCO Applied Sciences (USA) Inc.

Authors

Tuesday July 9, 2019 12:10 - 12:30 EDT
Westmount 5
  T12 Underwater & marit. noise, SS02 Ship & harbr noise & vibr