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inverse problems in the modeling of vibrations of flexible beamsThe formulation and solution of inverse problems for the estimation of parameters which describe damping and other dynamic properties in distributed models for the vibration of flexible structures is considered. Motivated by a slewing beam experiment, the identification of a nonlinear velocity dependent term which models air drag damping in the Euler-Bernoulli equation is investigated. Galerkin techniques are used to generate finite dimensional approximations. Convergence estimates and numerical results are given. The modeling of, and related inverse problems for the dynamics of a high pressure hose line feeding a gas thruster actuator at the tip of a cantilevered beam are then considered. Approximation and convergence are discussed and numerical results involving experimental data are presented.
Document ID
19870011344
Document Type
Preprint (Draft being sent to journal)
Authors
Banks, H. T.
(NASA Langley Research Center Hampton, VA, United States)
Powers, R. K.
(NASA Langley Research Center Hampton, VA, United States)
Rosen, I. G.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 5, 2013
Publication Date
February 1, 1987
Subject Category
NUMERICAL ANALYSIS
Report/Patent Number
NAS 1.26:178259
NASA-CR-178259
ICASE-87-10
AD-A185727
Funding Number(s)
PROJECT: RTOP 505-90-21-01
CONTRACT_GRANT: NAS1-18107
CONTRACT_GRANT: NAS1-17070
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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