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http://dx.doi.org/10.12652/Ksce.2011.31.4A.287

Piezoelectric Energy Harvesting from Bridge Vibrations under Railway Loads  

Kwon, Soon-Duck (전북대학교 토목공학과)
Lee, Hankyu (DM엔지니어링)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.31, no.4A, 2011 , pp. 287-293 More about this Journal
Abstract
This paper investigates the applicability of a piezoelectric cantilever for energy supply of wireless sensor node used in structural health monitoring of bridges. By combining the constitutive equation of piezoelectric material and the dynamic equation of cantilever structure, the coupled governing equation for cantilever equipped piezoelectric patches has been addressed in matrix form. Forced excitation tests were carried out to validate the numerical model and to investigate the power output characteristics of the energy harvester. From the numerical simulation based on the measured bridge accelerations under KTX, Saemaul, Mugunghwa trains, the peak powers generated from the device were found to be 28.5 mW, 0.65 mW, 0.51 mW respectively. It is revealed from the results that bridge vibrations caused by moving loads is not a practical source for energy harvesting because of its low acceleration level, low frequency and short duration.
Keywords
energy harvesting; piezoelectric; bridge vibration; moving load;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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