On identification of structures with internal resonancesIdentification of structures which exhibit modal interactions is considered, and the difficulties experienced due to these interactions are examined. Free oscillations of quadratically and cubically coupled pairs of oscillators are analytically studied to illustrate nonlinear interactions between structural modes involved in two-to-one and one-to-one frequency relationships. In light of this study, results obtained from application of the eigensystem realization algorithm toward identification of a beam-mass structure with a two-to-one frequency relationship and quadratic coupling are presented and discussed.
Document ID
19920043697
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Balachandran, B. (NASA Langley Research Center Hampton, VA, United States)
Nayfeh, A. H. (Virginia Polytechnic Institute and State University Blacksburg, United States)
Smith, S. W. (Kentucky, University Lexington, United States)
Pappa, R. S. (NASA Langley Research Center Hampton, VA, United States)