Parametric Identification for a Truss Structure Using Axial Strain

Abstract

The increasing use of advanced sensing technologies such as optic fiber Bragg grating and embedded piezoelectric sensors necessitates the development of strain-based identification methodologies. in this study, a three-step neural networks based strategy, called direct soft parametric identification (DSPI), is presented to identify structural member stiffness and damping parameters directly from free vibration-induced strain measurements. the rationality of the strain based DSPI methodology is explained and the theoretical basis for the construction of a strain-based emulator neural network (SENN) and a parametric evaluation neural network (PENN) are described according to the discrete time solution of the state space equation of structural free vibration. the accuracy, robustness, and efficacy of the proposed strategy are examined using a truss structure with a known mass distribution. Numerical simulations indicate that the average relative errors of identified structural properties were less than 5% and relatively insensitive to measurement noises.

Department(s)

Civil, Architectural and Environmental Engineering

Keywords and Phrases

Direct Soft Parametric Identification; Infrastructure; Mass Distribution; Sensing Technologies; Truss Structure; Neural networks (Computer science)

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2007 Wiley-Blackwell, All rights reserved.

Publication Date

01 Apr 2007

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