Abstract—This study introduces finite element analysis to design multiple cantilever beams for ocean wave energy harvest. The ocean wave energy is transformed to vibration, and it will be converted to electricity by piezoelectric. The natural frequencies of the beams should be tuned as low frequency relative to ocean wave energy in Thailand. The natural frequencies of the beams are designed by finite element analysis such as 4.461, 8.479, 13.802, and 25.105 Hz, which are the frequencies of swaying and bending motions. The experiment result presents that power harvest from piezoelectric is related to the desired frequency. The suitable range of energy harvest is from 11 to 24 Hz. The error occurs about 3.4-5.8%, cause of which depends on stiffness of piezoelectric plate Then, the stiffness and the natural frequency of the beams may be slightly increased.
 

Index Terms—ocean wave energy, natural frequency, multi-cantilever beams, piezoelectric, FEA

Cite: Chuttipong Tuma and Danai Phaoharuhansa, "Ocean Wave Energy Harvest Using Multi-Piezoelectric Cantilever Beams," International Journal of Mechanical Engineering and Robotics Research, Vol. 9, No. 6, pp. 911-916, June 2020. DOI: 10.18178/ijmerr.9.6.911-916

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