VIBRATION CONTROL IN PHNONOIC PIEZOELECTRIC WITH NEGATIVE CAPACITANCE SHUNTING CIRCUIT
Periodic arrays of shunted piezoelectric patches are employed to control the propagation of elastic waves in phononic beams.Each piezo-patch is connected to a single resistance-inductance- negative capacitance shunting circuit.The eigenvalue equation of the phononic piezoelectric beam is deduced by combining the piezoelectric effect of the piezoelectric patch with the mechanical vibration.Two main differences between the negative capacitance shunt networks and traditional circuits are found.(1)Negative capacitance shunt networks can change the widths and locations of locally resonant band gaps.(2)when the negative capacitance is close to inherent capacitance,the noise reduction is remarkable.Commercial finite element software COMSOL Multiphysic5.2 is used to simulate the vibration modes of the phononic piezoelectric beam.
Phononic crystals Negative capacitance shunting circuit Finite element model simulation
Yi-fan TANG Yang DOU Shu-yu LIN
Shaanxi Key Laboratory of Ultrasonics, Institute of Applied Acoustics, Shaanxi Normal University,Xi Xian Yitong Thermal Technology Services Limited Liability Company, Xian, 710119, China
国际会议
The 2016 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2016全国压电和声波理论及器件技术研讨会)
西安
英文
419-422
2016-10-21（万方平台首次上网日期，不代表论文的发表时间）