Design optimization of layered periodic composites for desired elastodynamic response

H. Sadeghi; S. Nemat-Nasser

doi:10.1117/12.2083048

23 March 2015 Design optimization of layered periodic composites for desired elastodynamic response

H. Sadeghi, S. Nemat-Nasser

Proceedings Volume 9438, Health Monitoring of Structural and Biological Systems 2015; 94380T (2015) https://doi.org/10.1117/12.2083048
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2015, San Diego, California, United States

Abstract

In this work, we present a systematic method to design layered periodic composites (PCs) for a prescribed elastodynamic response. Our focus is on optimization problems with equality and/or inequality constraints. Constrained optimization problems are reduced to unconstrained problems, and a genetic algorithm is used to find the optimal design. Symmetric 3-phase layered PCs are considered and the thickness of each phase is chosen as a design parameter. Three cases are presented for illustration purposes: (1) the design of an acoustic filter for maximum bandwidth, (2) the design of an acoustic filter for maximum attenuation, and (3) the design of a PC for maximum attenuation and minimum reflection of acoustic waves.

Citation Download Citation

H. Sadeghi and S. Nemat-Nasser "Design optimization of layered periodic composites for desired elastodynamic response", Proc. SPIE 9438, Health Monitoring of Structural and Biological Systems 2015, 94380T (23 March 2015); https://doi.org/10.1117/12.2083048

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