Far-Field Power Transmissions in Orthotropic Plates: A New Approach
-
Published:2008
Issue:1
Volume:15
Page:71-78
-
ISSN:1070-9622
-
Container-title:Shock and Vibration
-
language:en
-
Short-container-title:Shock and Vibration
Affiliation:
1. Centre for Railway Engineering, Central Queensland University, Bruce Highway, North Rockhampton, Queensland 4702, Australia
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.
Publisher
Hindawi Limited
Subject
Mechanical Engineering,Mechanics of Materials,Geotechnical Engineering and Engineering Geology,Condensed Matter Physics,Civil and Structural Engineering