It is known that, when the mechanical coupling between the substructures is weak, small imperfections in a periodic structure can induce vibration localization. This phenomenon could lead to large vibration in certain regions of the structure and could be very harmful to the system. In this study, it is shown that the proposed coupled piezoelectric circuits can greatly relieve or even eliminate such localization problems. Part of the structural vibration energy will be transferred into electrical energy through the piezoelectric materials, and the newly created electro-mechanical wave/energy channel will sustain the energy propagation throughout the structure. The effectiveness and robustness of the coupled piezoelectric circuits on reducing vibration localization is demonstrated through analysis. Design guidelines are also established via approximation techniques and parametric studies.
Vibration Delocalization of Nearly Periodic Structures Using Coupled Piezoelectric Networks
Contributed by the Technical Committee on Vibration and Sound for publication in the JOURNAL OF VIBRATION AND ACOUSTICS. Manuscript received March 2001; Revised December 2001. Associate Editor: H. S. Tzou.
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Tang, J., and Wang, K. W. (January 6, 2003). "Vibration Delocalization of Nearly Periodic Structures Using Coupled Piezoelectric Networks ." ASME. J. Vib. Acoust. January 2003; 125(1): 95–108. https://doi.org/10.1115/1.1521951
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