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AERODYNAMIC DAMPING OF RANDOMLY EXCITED PLATES IN STATIONARY AND MOVING AIR

✍ Scribed by A.Z. TARNOPOLSKY; J.C.S. LAI; N.H. FLETCHER

Publisher: Elsevier Science
Year: 2002
Tongue: English
Weight: 207 KB
Volume: 253
Category: Article
ISSN: 0022-460X
DOI: 10.1006/jsvi.2001.3805

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✦ Synopsis

An experimental study of the aerodynamic damping of oscillating plates has been undertaken. Plates of various shapes were placed into an air #ow normal to the plate and excited to oscillate parallel to the #ow 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 #ow velocity in moving air. The #ow velocity was also found to a!ect 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 #ow velocity.

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