Publication
Title
Determining the power flow in a rectangular plate using a generalized two-step regressive discrete fourier series
Author
Abstract
The evaluation of structural power flow (or structural intensity (SI)) in engineering structures is a field of increasing interest in connection with vibration analysis and noise control. In contrast to classical techniques such as modal analysis, the SI indicates the magnitude and direction of the vibratory energy traveling in the structures, which yields information about the positions of the sources/sinks, along with the energy transmission path. In this paper, a new algorithm is proposed to model operational deflection shapes (ODS). The model is a two-dimensional Fourier domain model that is estimated by using a weighted nonlinear least-squares method. From the wave number-frequency domain data thus obtained, the spatial derivatives that are necessary to determine the structural power flow are easily computed. The proposed method is less sensitive to measurement noise than traditional power flow estimation techniques. A numerical model of a simply supported plate excited by two shakers, phased to act as an energy source and sink, is used as a simulation case. Measurements are executed on a clamped plate excited by an electromagnetic shaker in combination with a damper. [DOI: 10.1115/1.4006756]
Language
English
Source (journal)
Transactions of the ASME: journal of vibration and acoustics / American Society of Mechanical Engineers. - New York
Publication
New York : 2012
ISSN
1048-9002
Volume/pages
134:6(2012)
Article Reference
061007
ISI
000314748900007
Medium
E-only publicatie
Full text (Publisher's DOI)
UAntwerpen
Faculty/Department
[E?say:metaLocaldata.cgzprojectinf]
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 30.04.2013
Last edited 14.10.2017
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