Consistent first-order structural parameter improvements using dynamic test data

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Abstract

This paper provides a uniform basis for comparison of most existing linearized parameter refinement procedures which have been proposed in structural dynamics. The manner in which this is achieved is to establish a consistent first-order theory based upon linearized perturbations of the structural dynamic parameters and responses. Free and steady-state vibration equations are considered. The equivalence between Taylor Series-based expansion methods (to produce parameter updating equations) and the various equation-error methods, are then established. An explanation is offered for the empirical result that eigenvalue adjustment-based parameter improvement procedures often appear to produce superior results, in comparison to the use of other error criteria. A realistic numerical example displaying this phenomenon is provided. Computational considerations for solution of the resulting parameter equation sets are also discussed herein.

Original languageEnglish (US)
Pages (from-to)139-150
Number of pages12
JournalModal analysis
Volume9
Issue number2
StatePublished - Apr 1994
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Engineering

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