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| Locally resonant band gaps and the corresponding vibration attenuations of the piezoelectric phononic beam consisted of negative capacitor based resonant circuits |
| CHEN Liang 1 DU Hongjun1WANG Gang 2 ZHANG Hao 3 |
1.Laboratory of Science and Technology on Integrated Logistics Support, National University of Defense Technology,Changsha 410073；
2. College of Mechanical and Vehicle Engineering, Hunan University, Changsha 410082 |
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Abstract Periodic arrays of piezoelectric patches connected with serial negative capacitance-resistive-inductive (SNCRL) circuits are attached to an epoxy beam in order to construct a piezoelectric phononic beam structure. The band-gaps structure of the piezoelectric phononic beam is calculated with the transfer matrix approach. Subsequently, the influences of the resistance, inductance and negative capacitance parametric on locally resonant band-gaps are analysed. It is found that the LC oscillator circuit can lead to locally resonant band-gaps, and the negative capacitive circuits can enhance the electromechanical coupling efficiency of piezoelectric patches, i.e. the attenuation in the locally resonant band-gaps are enlarged thereby. Finally, vibration experiments are conducted to validate the theoretical predictions, and considerable gap enhancements by negative capacitance are observed. This work provides a new way in the design of phononic crystals with tunable band gaps.
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Received: 09 April 2015
Published: 15 May 2016
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| Cite this article: |
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CHEN Liang 1 DU Hongjun1WANG Gang 2 ZHANG Hao 3. Locally resonant band gaps and the corresponding vibration attenuations of the piezoelectric phononic beam consisted of negative capacitor based resonant circuits[J]. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(10): 38-43.
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| URL: |
| http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2016/V35/I10/38 |
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