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
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.
陈良1 杜红军1王刚2 张浩3 . 含负电容谐振分流电路的压电声子晶体梁的局域共振带隙与振动衰减[J]. 振动与冲击, 2016, 35(10): 38-43.
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. JOURNAL OF VIBRATION AND SHOCK, 2016, 35(10): 38-43.
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