Improved negative capacitance shunt damping with the use of acoustic black holes

Benjamin S. Beck, Kenneth A. Cunefare

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Scopus citations

Abstract

Negative capacitance shunt damping is an effective broadband method for attenuating flexural vibration. However, proper selection of the location of the piezoelectric patches on a structure to maximize reduction has been an ongoing question in the field. Acoustic black holes are a recently developed concept to reduce vibrations on thin vibrating structures. By engineering the geometric or material properties of these thin structures, it is possible to minimize the reflected wave by gradually reducing the wave speed. However, the flexural wave speed cannot be reduced to zero on a realized structure. Therefore, when acoustic black holes are implemented, some of the incident wave energy is reflected because the wave speed must be truncated. Similarly due to the reduction in wave speed, the transverse velocity significantly increases within the acoustic black hole. It is therefore possible to add piezoelectric transducers to acoustic black hole regions on a structure to utilize negative capacitance shunt damping to address both of these issues. Consequently, the transducers are placed in the locations where the greatest control can be made and the reflected waves can be attenuated. The combination of negative capacitance shunt damping with acoustic black holes shows increased suppression of vibration over shunt damping alone.

Original languageEnglish (US)
Title of host publicationActive and Passive Smart Structures and Integrated Systems 2014
PublisherSPIE
ISBN (Print)9780819499837
DOIs
StatePublished - Jan 1 2014
EventActive and Passive Smart Structures and Integrated Systems 2014 - San Diego, CA, United States
Duration: Mar 10 2014Mar 13 2014

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9057
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

OtherActive and Passive Smart Structures and Integrated Systems 2014
CountryUnited States
CitySan Diego, CA
Period3/10/143/13/14

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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    Beck, B. S., & Cunefare, K. A. (2014). Improved negative capacitance shunt damping with the use of acoustic black holes. In Active and Passive Smart Structures and Integrated Systems 2014 [90571Z] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9057). SPIE. https://doi.org/10.1117/12.2045927