Research on modal analysis (1st report, general purpose of curve fitting and basic study)

A system program of curve-fitting for general purpose is worked out to analyze the modal parameters from a transfer function obtained by a vibration test and to reconstruct the frequency curve of the transfer function. Both the frequency domain and the time domain curve-fittings are shown to be poss...

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Bibliographic Details
Published in:Bulletin of the JSME 1984-07, Vol.27 (229), p.1544-1548
Main Authors: Nagaike, M, Nagamatsu, A
Format: Article
Language:English
Online Access:Get full text
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Summary:A system program of curve-fitting for general purpose is worked out to analyze the modal parameters from a transfer function obtained by a vibration test and to reconstruct the frequency curve of the transfer function. Both the frequency domain and the time domain curve-fittings are shown to be possible under the assumption of three kinds of damping, namely, proportional viscous, general viscous, and hysteretic. A transfer function of a mass-spring system of three degrees-of-freedom is fitted by six methods using this program, and calculated results of modal parameters are compared with rigorous solutions. A transfer function of a steel plate obtained via the vibration test is fitted using this program, and the result is compared with the experimental results.
ISSN:0021-3764