Noncontacting Excitation and Measurement of Light Structures

[+] Author and Article Information
Yacine M. Amraoui, Nick A. J. Lieven

Department of Aerospace Engineering, University of Bristol, Bristol BS8 1TR, England

J. Vib. Acoust 125(1), 114-119 (Jan 06, 2003) (6 pages) doi:10.1115/1.1526129 History: Received February 01, 2002; Revised August 01, 2002; Online January 06, 2003
Copyright © 2003 by ASME
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Geometrical properties of the ellipse
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The image source principle
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Geometric parameters and differential surfaces
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Influence of the dimensions on the response
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Choice of the eccentricity, with a reflection coefficient
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The dimensions of the ellipsoid
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Geometry of the real and image waves in the reflector
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Pressure distribution in the focus plane at various moments for excitation frequencies of 100, 500 and 1000 Hz
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(a) Schematic of the experimental set-up; (b) Overview of the experimental set-up.
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Sound pressure level with and without reflector
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Phase and Mobility functions for the shaker and the acoustic reflector




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