PREDICTING RADIATED SOUND FROM A SUBMERGED RING-STIFFENED CYLINDER

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Authors
  1. Gilroy, L.E.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Defence Research Establishment Atlantic (DREA) conducted experiments involving the measurement of radiated noise from a submerged ring-stiffened cylinder subjected to a harmonic load. These experiments were performed to provide validation data for structural acoustics computer codes being developed in-house and under contract. These codes are used to predict the vibrations of structures submerged in, or filled with, a dense fluid and also to predict the resulting radiated noise. This suite of codes, comprising the programs VAST, COUPLE, and BEMAP, was used to predict the natural frequencies and radiated noise, on-and off-resonance, from this cylinder. Comparisons are made between the predicted and measured natural frequencies and radiated noise levels and directivity. Overall, the programs were able to accurately predict both the structural resonances and the radiated noise patterns.
Keywords
Submerged structures;Boundary layer analysis
Report Number
DREA-TM-96-237 — Technical Memorandum
Date of publication
01 Mar 1997
Number of Pages
71
DSTKIM No
97-02246
CANDIS No
502482
Format(s):
Hardcopy;Document Image stored on Optical Disk

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