Suppression of acoustic noise transmission through piezo-coupled elastic plates

Gareth J. Knowles; Victor W. Chang; John J. Murray

doi:10.1117/12.275643

6 June 1997 Suppression of acoustic noise transmission through piezo-coupled elastic plates

Gareth J. Knowles, Victor W. Chang, John J. Murray

Proceedings Volume 3041, Smart Structures and Materials 1997: Smart Structures and Integrated Systems; (1997) https://doi.org/10.1117/12.275643
Event: Smart Structures and Materials '97, 1997, San Diego, CA, United States

Abstract

Finite-element piezoelectric modeling theory is merged with electronics design and implemented to study of elastic plate structures exhibiting control action via multiple piezoelectric attached devices. The theoretical results are validated utilizing FEA modeling of NASA Langley Acoustics Division Transmission Loss Facility circular elastic plate testbed. This testbed is modeled using advanced meshing capability and processing that includes a full electrical- mechanical modeling capability for piezoelectric elements. The model is validated using the simple test case of integral feedback, together with a fully coupled piezo-element feature. The detailed development of the multimodal piezo-coupled (continuum) equations of motion together with the FEA feedback coupled modeling for an elastic plate structure incorporating piezoelectric devices as sensors and actuators is presented.

Citation Download Citation

Gareth J. Knowles, Victor W. Chang, and John J. Murray "Suppression of acoustic noise transmission through piezo-coupled elastic plates", Proc. SPIE 3041, Smart Structures and Materials 1997: Smart Structures and Integrated Systems, (6 June 1997); https://doi.org/10.1117/12.275643

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