An Identification Technique for Damped Distributed Structural Systems Using the Method of Collocation

Item

Title
An Identification Technique for Damped Distributed Structural Systems Using the Method of Collocation
Report Number
WL-TR-91-3078 Volume III, p. GCA-1 thru GCA-12
Creator
Chander, R.
Meyyappa, M.
Hanagud, S. V.
Corporate Author
Aerostructures, Inc.
McDonnell Douglas Helicopter Co.
Laboratory
Wright Laboratory
Date
1991
Date Issued
1991-08
Extent
12
Identifier
ADA241313
Abstract
An identification scheme in the frequency domain, suitable for one-dimensional distributed structural dynamic systems with damping is considered. For this purpose, the form of a model representing the behavior of an Euler-Bernoulli beam is assumed to be known in the frequency domain. Also, the response of the system is assumed to be given at discrete locations along the
beam. Quintic B-splines are then used to obtain a continuous representation of the response and its derivatives. The system parameters appearing in the governing differential equation are considered to be spatially varying functions. Cubic B-splines are
used to approximate the parameter space, and their derivatives are obtained from such approximations. The method of collocation in conjunction with the equation error approach is then used to estimate the unknown parameters, which are the unknown coefficients of the parameter splines. A numerically simulated response of an Euler-Bernoulli beam in the presence of viscous
damping is considered to validate the identification scheme. The estimated values of mass, stiffness and damping are discussed.
Distribution Classification
1
Distribution Conflict
No
DTIC Record Exists
No
Illinois Tech Related
No
Photo Quality
Not needed
Report Availability
Full text available
Type
article
Is Part Of
Proceedings of Damping '91: 13-15 February 1991 San Diego, California (GCA-1 through JCB-17)
Media
articleGCA

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Items with "Has Part: An Identification Technique for Damped Distributed Structural Systems Using the Method of Collocation"
Title Class
Proceedings of Damping '91: 13-15 February 1991 San Diego, California (GCA-1 through JCB-17)