Understanding the electromechanical admittance of piezoelectric transducers collocated on a finite beam from the perspective of wave propagation

作者：Park Hyun Woo^*

来源：Journal of Intelligent Material Systems and Structures, 2014, 25(17): 2122-2140.

DOI：10.1177/1045389X14549874

• Flexural wave group
• wave propagation
• evolution
• electromechanical admittance
• collocated piezoelectric transducers
• finite beam
• electromechanical impedance approach
• guided wave approach
• structural health monitoring

This article analytically investigates the electromechanical admittance of piezoelectric transducers collocated on a finite beam from the perspective of wave propagation. First, the analytic solutions are derived for flexural waves induced by piezoelectric transducers collocated on an infinite beam. Then, the concept of a flexural wave group is used to express the analytic solutions for flexural waves reverberating on a finite beam. Detailed formulation is presented to describe the evolution of resonance of a beam and the corresponding electromechanical signatures induced by flexural wave groups. The validity of the proposed formulation has been demonstrated through a proof-of-concept numerical simulation providing more rigorous physical insight on the relevance between the flexural wave groups and the electromechanical signatures within the relatively low-frequency range.

• 出版日期2014-11