Anechoic Chamber Measurements of Radiated Noise from a Ring-Stiffened Cylinder

摘要

Defense Research Establishment Atlantic (DREA) recently conducted experiments tomeasure the radiated noise from a ring-stiffened cylinder subjected to a harmonic load under the controlled conditions at Health Canada's anechoic chamber located at the Brookfield Road lab in Ottawa. These experiments were performed to provide validation data for structural acoustics computer codes being developed in-house and under contract. This technical memorandum discusses the specifics of the cylinder and the instrumentation, as well as the experimental procedure. This report also contains the results of the natural frequency testing and the plots of the measured directivity patterns. A full comparison of the results with numerical analysis will be discussed in another report.