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- W2085822144 abstract "Standard damping measurements cannot typically distinguish between structural losses and losses due to acoustic radiation. Since the trend in aerospace engineering is to use lighter and stiffer materials, aerospace panels often have their critical frequency at low to mid frequencies making the acoustic losses of comparable or greater value than the structural loss factors. A procedure for measuring acoustic radiation loss factors is presented based on experimental modal analysis. Experimental modal analysis was performed on a composite panel with carbon-fiber facesheets and an aluminum honeycomb core. The loss factors using the standard decay and modal methods are compared to an energy-based method based on the power injection method. The acoustic radiation loss factors were then estimated using boundary element computations of the radiated noise with the modally reconstructed velocity as input. The acoustic radiation damping was then removed from the total damping to predict the losses due to structural damping only." @default.
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- W2085822144 date "2012-09-01" @default.
- W2085822144 modified "2023-09-25" @default.
- W2085822144 title "Predicting structural and acoustic-radiation loss factors using experimental modal analysis" @default.
- W2085822144 doi "https://doi.org/10.1121/1.4754941" @default.
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