✦ LIBER ✦

CONTROL OF FLEXURAL WAVES ON A BEAM USING A TUNABLE VIBRATION NEUTRALISER

✍ Scribed by M.J. Brennan

Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 175 KB
Volume: 222
Category: Article
ISSN: 0022-460X
DOI: 10.1006/jsvi.1998.2031

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✦ Synopsis

This paper describes an analytical and experimental investigation into the use of a tunable vibration neutraliser to control the transmission of ¯exural propagating waves on an in®nite Euler±Bernoulli beam. The paper investigates the way in which the physical properties of the neutraliser aect the attenuation of an incident ¯exural wave, and the frequency at which the neutraliser should be tuned to in order to achieve the maximum attenuation of this wave. Expressions are derived for the attenuation, the tuned frequency and the bandwidth of the device. A simple control parameter is also proposed that uses two signals measured with accelerometers on the beam at the base of the neutraliser. This facilitates a compact control device. The theoretical predictions are validated by a simple experiment.

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