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The Temporal Correlation Method For Modal Identification Of Lightly Damped Structures

โœ Scribed by M.A. Norris; S.P. Kahn; L.M. Silverberg; C.E. Hedgecock

Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
367 KB
Volume
162
Category
Article
ISSN
0022-460X

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โœฆ Synopsis

This work represents an extension and experimental verification of earlier work proposed for modal identification of distributed structures in the time domain. The Temporal Correlation Method has been shown to be a constrained version of the Eigensystem Realization Algorithm. Furthermore, in this method, the configuration space has half the dimension of the state space, so that the technique has obvious computational advantages. Also, advantage is taken of the temporal correlation and spatial orthogonality properties of lightly damped nearly self-adjoint distributed systems. Extensions of unmodeled (residual) modes on the identification are discussed, in which the identified modes are now shown to obey an inclusion principle. The method is verified experimentally by considering a onedimensional cantilever beam and a two-dimensional grid structure.

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