Calculation of component mode synthesis matrices from measured frequency response functions

Jeffrey A. Morgan, Christophe Pierre, Gregory M. Hulbert

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

2 Scopus citations

Abstract

This paper shows how to calculate Craig-Bampton component mode synthesis matrices from measured frequency response functions. The procedure is based on a modified residual flexibility method and the use of a Maclaurin series expansion to represent the residual effects of the omitted modes. It was developed as a base-band method for structures exhibiting normal modes of vibration determined from free boundary vibration tests. Of particular importance is the procedure developed for the estimation of the Maclaurin series expansion coefficients and for the recovery of the Craig-Bampton matrices from the residual flexibility formulation. This allows accurate dynamic models to be determined for measured systems that can be used to predict the effects of structural modifications and in substructure coupling analyses. The performance of the new method is demonstrated by comparison of experiment and analysis for two simple beams.

Original languageEnglish
Title of host publication15th Biennial Conference on Mechanical Vibration and Noise
EditorsK.W. Wang, B. Yang, J.Q. Sun, K. Seto, K. Yoshida, al et al
Pages861-876
Number of pages16
Edition3 Pt B/2
StatePublished - 1995
EventProceedings of the 1995 ASME Design Engineering Technical Conference. Part C - Boston, MA, USA
Duration: 17 Sep 199520 Sep 1995

Publication series

NameAmerican Society of Mechanical Engineers, Design Engineering Division (Publication) DE
Number3 Pt B/2
Volume84

Conference

ConferenceProceedings of the 1995 ASME Design Engineering Technical Conference. Part C
CityBoston, MA, USA
Period17/09/9520/09/95

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