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Dynamic structural correlation via nonlinear programming techniquesA solution to the correlation between structural dynamic test results and finite element analyses of the same components is presented in this paper. Basically, the method can be categorized as a Levenberg-Marquardt type Gauss-Newton method which requires only the differences between FE modal analyses and test results and their first derivatives with respect to preassigned design variables. With proper variable normalization and equation scaling, the method has been made numerically better-conditioned and the inclusion of the Levenberg-Marquardt technique overcomes any remaining difficulty encountered in inverting singular or near-singular matrices. An important feature is that each iteration requires only one function evaluation along with the associated design sensitivity analysis and so the procedure is computationally efficient.
Document ID
19930075308
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Ting, T.
(Bridgeport Univ. CT, United States)
Ojalvo, I. U.
(Bridgeport Univ. CT, United States)
Date Acquired
August 16, 2013
Publication Date
March 24, 1988
Publication Information
Publication: JPL, Model Determination for Large Space Systems, Volume 3
Subject Category
Structural Mechanics
Accession Number
93N72755
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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