Abstract—This study conducted the structural eigenvalue analysis on a highway bridge model to investigate its vibration characteristics and to find out an appropriate location to set a new power-generating device using a magnetostrictive element (Fe-Ga alloy). The energy generator is consisting of a Fe-Ga element of 4 x 0.5 x 1.6 mm attached to a U-shaped frame with a permanent magnet for magnetic bias wound about by a coil and the weight attached to the tip of the U-shaped frame was adjusted to allow the frame vibrates with the frequency of the vibration source. First, a part of the elevated line of a highway bridge located in Kanazawa city was reproduced by using a commercial finite element software named DIANA. As the results, at the lateral brace between G1 – G2 main girders and P2 – P3 pier, which its frequency was estimated to be ~ 19Hz, is the optimal place for the device. Moreover, an open-circuit voltage of ~ 8V was recorded.

Index Terms— vibration-based power generation, highway bridge, structural eigenvalue analysis

Cite: Hoang Minh Ngo Le, Tuan Minh Ha, Saiji Fukada, and Toshiyuki Ueno, "Power Generation from Bridge Vibration under Ordinary Vehicle Load," International Journal of Structural and Civil Engineering Research, Vol. 10, No. 4, pp. 165-171, November 2021. doi: 10.18178/ijscer.10.4.165-171

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