Aerodynamic Damping of Randomly Excited Plates in Stationary and Moving Air
Date
2002
Authors
Tarnopolsky, Alex Z
Lai, J C S
Fletcher, Neville H.
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Publisher
Academic Press
Abstract
An experimental study of the aerodynamic damping of oscillating plates has been undertaken. Plates of various shapes were placed into an air flow normal to the plate and excited to oscillate parallel to the flow direction by electromagnetic forces of equal amplitudes and random frequencies. The aerodynamic damping of oscillating plates, evaluated in terms of a quality Q-factor from a frequency response resonance curve, was found to vary linearly with the absolute pressure in stationary surrounding air and with the air flow velocity in moving air. The flow velocity was also found to affect the aerodynamic damping more than the absolute pressure. A simple empirical model has been developed to predict the variation of the aerodynamic damping with the flow velocity.
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Keywords
Keywords: Aerodynamics; Frequencies; Oscillations; Plate metal; Pressure control; Velocity measurement; Aerodynamic damping; Air flow velocity; Oscillating plates; Damping
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Source
Journal of Sound and Vibration
Type
Journal article
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2037-12-31
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