Far-Field Power Transmissions in Orthotropic Plates: A New ApproachReport as inadecuate




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Shock and Vibration - Volume 15 2008, Issue 1, Pages 71-78

Centre for Railway Engineering, Central Queensland University, Bruce Highway, North Rockhampton, Queensland 4702, Australia

Received 8 March 2004; Revised 20 April 2006

Copyright © 2008 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The structural intensity SI technique is an essential tool for locating and ranking vibration sources and sinks on structures. It can quantify vibration fields by plotting a vector map of energy transmission on the structures. In this paper, a different strategy, changing coordinate systems of plate equations, is used to develop an intensity equation from shear force components in both x and y directions. The formulation is carried out in the frequency domain considering flexural waves. Orthotropic plate theory, far-field conditions, Fourier transform, and finite difference approximation are considered. The same intensity definition is obtained using this different strategy. A dual-channel FFT analyser is essential for data acquisition to get an intensity vector in a particular direction for far-field conditions.





Author: Nirmal K. Mandal

Source: https://www.hindawi.com/



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