Energy Conversion Efficiency of Rainbow Shape Piezoelectric Transducer |
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Authors: | LIU Xiangjian CHEN Renwen ZHU Liya Aeronautical Science |
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Institution: | Key Laboratory for Smart Materials and Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China |
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Abstract: | With the aim to enhance the energy conversion efficiency of the rainbow shape piezoelectric transducer, an analysis model of energy conversion efficiency is established based on the elastic mechanics theory and piezoelectricity theory. It can be found that the energy conversion efficiency of the rainbow shape piezoelectric transducer mainly depends on its shape parameters and material properties from the analysis model. Simulation results show that there is an optimal length ratio to generate maximum energy conversion efficiency and the optimal length ratios and energy conversion efficiencies of beryllium bronze substrate transducer and steel substrate transducer are (0.65, 2.21%) and (0.65, 1.64%) respectively. The optimal thickness ratios and energy conversion efficiencies of beryllium bronze substrate transducer and steel substrate transducer are (1.16, 2.56%) and (1.49, 1.57%) respectively. With the increase of width ratio and initial curvature radius, both the energy conversion efficiencies decrease. Moreover, beryllium bronze flexible substrate transducer is superior to the steel flexible substrate transducer. |
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Keywords: | energy conversion efficiency rainbow shape piezoelectric transducer theoretical analysis energy harvesting electromechanical coupling coefficient |
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