Investigation of tuning-fork double piezoelectric fans with elastic base

Huang, Fanyang; Zhang, Liansheng; Pan, Qianqian; He, L.; Feng, Zhi Hua

doi:10.1016/j.applthermaleng.2016.03.172

Cited by 5 publications

(2 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Conceptually, it would be more economical and possibly more efficient to relocate vibration energy from certain important regions to other unimportant regions rather than dissipate it uniformly throughout a structure. Indeed, vibration modes exemplify themselves at natural/resonant frequencies, and customized changes of vibration modes have the potential to benefit actuation, sensing, and energy harvesting (Goldschmidtboeing and Woias 2008, Joglekar and Pawaskar 2011, Xu et al 2012, Wang and Feng 2013, Nguyen et al 2014, Huang et al 2016. Despite the efforts and the tempting, potential outcome, the subject of vibration mode customization has so far seen limited success.…”

Section: Introductionmentioning

confidence: 99%

“…Most of the methods are based on inverse analysis of eigenvalue problem at the system level. In passive approaches, shaping and manipulating vibration modes are usually realized by geometry tailoring (Victoria et al 2012, Xu et al 2012, Huang et al 2016. For example, reducing the width/thickness of a cantilever gradually along the length can create a vibration mode with uniform strain distribution for enhancing actuating and energy harvesting efficiency (Goldschmidtboeing and Woias 2008, Joglekar and Pawaskar 2011, Nguyen et al 2014.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Customized shaping of vibration modes by acoustic metamaterial synthesis

Tang

2018

Smart Mater. Struct.

View full text Add to dashboard Cite

Acoustic metamaterials have attractive potential in elastic wave guiding and attenuation over specific frequency ranges. The vast majority of related investigations are on transient waves. In this research we focus on stationary wave manipulation, i.e., shaping of vibration modes. Periodically arranged piezoelectric transducers shunted with inductive circuits are integrated to a beam structure to form a finite-length metamaterial beam. We demonstrate for the first time that, under a given operating frequency of interest, we can facilitate a metamaterial design such that this frequency becomes a natural frequency of the integrated system. Moreover, the vibration mode corresponding to this natural frequency can be customized and shaped to realize tailored/localized response distribution. This is fundamentally different from previous practices of utilizing geometry modification and/or feedback control to achieve mode tailoring. The metamaterial design is built upon the combinatorial effects of the bandgap feature and the effective resonant cavity feature, both attributed to the dynamic characteristics of the metamaterial beam. Analytical investigations based on unit-cell dynamics and modal analysis of the metamaterial beam are presented to reveal the underlying mechanism. Case illustrations are validated by finite element analyses. Owing to the online tunability of circuitry integrated, the proposed mode shaping technique can be online adjusted to fit specific requirements. The customized shaping of vibration modes by acoustic metamaterial synthesis has potential applications in vibration suppression, sensing enhancement and energy harvesting.

show abstract