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FINITE DIFFERENCE FORMULATION FOR MODAL PARAMETER ESTIMATION

✍ Scribed by H.P. YIN; D. DUHAMEL

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
255 KB
Volume
231
Category
Article
ISSN
0022-460X

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✦ Synopsis

This paper deals with a new "nite di!erence method for modal parameter estimation. This method uses formulas which involve di!erences between the frequency response data at three frequencies in the vicinity of a natural frequency to estimate this natural frequency together with the damping and the residue. Compared with the two-point "nite di!erence method, tests with both analytical and experimental frequency response data with not well-separated modes show better estimations when using the three-point di!erence method.

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