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The Effect of Uncertainty in the Excitattion on the Vibration Input Power to a Structure

Putra, Azma (2013) The Effect of Uncertainty in the Excitattion on the Vibration Input Power to a Structure. Advance in Acoustics and Vibration, 2013. pp. 1-18. ISSN 1687-627X

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Abstract

In structural dynamic systems, there is inevitable uncertainty in the input power from a source to a receiver. Apart from the nondeterministic properties of the source and receiver, there is also uncertainty in the excitation.his comes from the uncertainty of the forcing location on the receiver and, for multiple contact points, the relative phases, the force amplitude distribution at those points, and also their spatial separation.his paper investigates quantiication of the uncertainty using possibilistic or probabilistic approaches. hese provide the maximum and minimum bounds and the statistics of the input power, respectively. Expressions for the bounds, mean, and variance are presented. First the input power from multiple point forces acting on an ininite plate is examined.he problem is then extended to the input power to a inite plate described in terms of its modes.he uncertainty due to the force amplitude is also discussed. Finally, the contribution of moment excitation to the input power, which is oten ignored in the calculation, is investigated. For all cases, frequency band-averaged results are presented.

Item Type: Article
Subjects: T Technology > TJ Mechanical engineering and machinery
Divisions: Faculty of Mechanical Engineering > Department of Structure and Materials
Depositing User: Dr Azma Putra
Date Deposited: 17 Dec 2013 08:04
Last Modified: 28 May 2015 04:10
URI: http://eprints.utem.edu.my/id/eprint/10260

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