Parameter Estimation in Complex Linear Structures

by M. R. Banan, Univ of Illinois at Urbana-Champaign, Urbana, United States,
M. Banan, Univ of Illinois at Urbana-Champaign, Urbana, United States,
K. D. Hjelmstad, Univ of Illinois at Urbana-Champaign, Urbana, United States,



Document Type: Proceeding Paper

Part of: Probabilistic Mechanics and Structural and Geotechnical Reliability

Abstract:

We present a new parameter estimation method which simultaneously computes element constitutive parameters and unmeasured displacements of finite element models from measured static responses. The proposed algorithm is robust in a noisy environment, can deal with incompleteness of measurements, and is amenable to grouping of elements with the same parameters. The unknown parameters are estimated by solving a constrained nonlinear optimization problem. Robustness and reliability of the algorithm with respect to noisy measurements and incomplete measurement are studied through simulation.

Subject Headings: Finite element method | Parameters (statistics) | Structural analysis | Structural reliability | Sensitivity analysis | Linear analysis | Algorithms

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