This paper demonstrates how to calculate Craig-Bampton component mode synthesis matrices from measured frequency response functions. The procedure is based on a modified residual flexibility method, from which the Craig-Bampton CMS matrices are recovered, as presented in the companion paper, Part I (Morgan et al., 1998). A system of two coupled beams is analyzed using the experimentally-based method. The individual beams’ CMS matrices are calculated from measured frequency response functions. Then, the two beams are analytically coupled together using the test-derived matrices. Good agreement is obtained between the coupled system and the measured results.

Issue Section:
Research Papers
Topics:
Frequency response
1.
Allemang, R. J., and Brown, D. L., 1982,” A Correlation Coefficient for Modal Vector Analysis,” Proceedings of the First International Modal Analysis Conference, pp. 112–113.
2.
Licht, T. R., 1985, “Angular Vibration Measurements Transducers and Their Configurations,” Proceedings of the Third International Modal Analysis Conference, pp. 503–506.
3.
Morgan, J. A., Pierre, C., and Hulbert, G. M., 1995, “Calculation of Component Mode Synthesis Matrices from Measured Frequency Response Functions,” Proceedings, 1995 ASME Design Engineering Technical Conferences, DE-Vol. 84–2, pp. 861–876.
4.
Morgan, J. A., 1996, “Dynamic Analysis of Coupled Substructures Using Experimentally-Based Component Mode Synthesis,” Ph.D. Dissertation, The University of Michigan, Ann Arbor, MI.
5.
Morgan
J. A.
,
Pierre
C.
, and
Hulbert
G. M.
,
1998
, “
Calculation of Component Mode Synthesis Matrices from Measured Frequency Response Functions Part 1: Theory
,”
ASME JOURNAL OF VIBRATION AND ACOUSTICS
, Vol.
120
, Jan., pp.
503
–
508
.
6.
Strang, W. G., and Fix, G. J., 1973, An Analysis of the Finite Element Method, Prentice-Hall, Inc., Englewood Cliffs, NJ, p. 58.
7.
Toivola, J., and Nuutila, O., 1993, “Comparison of Three Methods For Determining Rigid Body Inertia Properties From Frequency Response Functions,” Proceedings of the Eleventh International Modal Analysis Conference, pp. 1126–1132.
8.
Trethewey
M. W.
, and
Cafeo
J. A.
,
1992
, “
Tutorial: Signal Processing Aspects of Structural Impact Testing
,”
The International Journal of Analytical and Experimental Modal Analysis
, Vol.
7
, No.
2
, pp.
129
–
149
.
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