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| Modeling and analysis of a circular PZT energy-generator for hydraulic liquid absorber |
WANG Shu-Yun1, KAN Jun-wu2, WANG Hong-Yun2, LI Zheng3，ZHAO Zi-Chao3, WAN Jie3, CAO Di3
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| 1 College of mathematics physics and information engineering, Zhejiang Normal University, Jinhua 321004, China)2 Institute of precision machinery, Zhejiang Normal University, Jinhua 321004, China3 College of Mechanical Science and Engineering, Jilin University, Changchun 130025, China |
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Abstract Abstract：A piezoelectric energy harvester based on hydraulic liquid absorber is presented. To enhance the energy-generating capability and obtain the optimal structural/material parameters, the analysis model of clamped PZT disk generator under concentrated force was established utilizing the theory of plate and shell. The influence of radius ratio (λ), thickness ratio (β) as well as material Young’s modulus ratio (ζ) of the PZT disk on energy generation was investigated. The research results show that there is an optimal pair of λ and β for a PZT disk generator with given ζ to obtain maximal electrical energy. Similarly, in the case of given λ and β, there are an optimal ζ, which decreases with β reducing under certain and is not influenced by λ changing under given β. At the same time, the reducing ζ is helpful for the generator to generate more electrical energy. When aluminum and beryllium bronze plates are used for substrate, the optimal radius ratio and thickness ratio are (0.45, 0.45) and (0.585, 0.6), respectively. The maximal electric energy from them are 1.14643x10-4J and 1.01893x10-4J, respectively.
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Received: 04 May 2011
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2012, Vol. 31 
