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Proceedings Paper

Optimal design of active, passive, and hybrid sandwich structures
Author(s): A. L. Araújo; C. M. Mota Soares; C. A. Mota Soares
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Paper Abstract

This paper presents optimization of active, passive, and hybrid damping treatments in sandwich plates. A new mixed layerwise finite element model has been developed for the analysis of sandwich laminated plates with a viscoelastic core, laminated anisotropic face layers and piezoelectric sensor and actuator layers. Proportional displacement and velocity feedback control laws are implemented to account for co-located active control. Optimization of passive damping is conducted by maximizing modal loss factors, using as design variables the viscoelastic core thickness and the constraining elastic layers ply thicknesses and orientation angles. Optimization of the location of co-located sensor-actuator pairs is also conducted in order to maximize modal loss factors. The optimization problem is solved using gradient-based techniques for passive damping and an implementation of a Genetic Algorithm for the optimal location of sensor-actuator pairs.

Paper Details

Date Published: 3 April 2008
PDF: 12 pages
Proc. SPIE 6926, Modeling, Signal Processing, and Control for Smart Structures 2008, 69260T (3 April 2008); doi: 10.1117/12.758224
Show Author Affiliations
A. L. Araújo, Polytechnic Institute of Bragança (Portugal)
C. M. Mota Soares, Technical Univ. of Lisbon (Portugal)
C. A. Mota Soares, Technical Univ. of Lisbon (Portugal)

Published in SPIE Proceedings Vol. 6926:
Modeling, Signal Processing, and Control for Smart Structures 2008
Douglas K. Lindner, Editor(s)

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