00000nam 2200000zi 4500 9.951644 CaOODSP 20250611130031 m o d f cr bn||||||||| 250530e199605##nscado ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn--- D68-21/54-1996E-PDF Gilroy, Layton E., 1963- author. Comparisons of numerically predicted and experimentally measured radiated noise from a ring-stiffened cylinder / Layton E. Gilroy ; approved by C.W. Bright. Dartmouth, N.S. : National Defence, Research and Development Branch = Défense nationale, Bureau de recherche et développement : Defence Research Establishment Atlantic = Centre de recherches pour la défense Atlantique, May 1996. 1 online resource (v, 38 pages) : illustrations, graphs, photographs. text txt rdacontent computer c rdamedia online resource cr rdacarrier Technical memorandum ; 96/217 Digitized edition from print [produced by Defence Research and Development Canada]. Includes bibliographical references (page 35). "Defence Research Establishment Atlantic (DREA), with the assistance of Health Canada, conducted an experiment involving the measurement of radiated noise from a ring-stiffened cylinder subjected to a harmonic load in an anechoic chamber. This experiment was 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 to also predict the resulting radiated noise. A subset of these codes, comprising the programs VAST 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"--Abstract, page ii. Includes abstracts in English and French. Cylinders Vibration. Noise Measurement. Interactive computer systems Canada. Cylindres Vibrations. Bruit Mesure. Systèmes conversationnels (Informatique) Canada. Defence Research Establishment Atlantic, issuing body. Canada. Department of National Defence. Research and Development Branch, issuing body. D.R.E.A. technical memorandum ; 96/217. (CaOODSP)9.941838 PDF 1.47 MB https://publications.gc.ca/collections/collection_2025/rddc-drdc/D68-21-54-1996-eng.pdf