Affiliations: [a] College of Mathematics Physics and Information
Engineering, Zhejiang Normal University, Jinhua, Zhejiang, China | [b] Institute of Precision Machinery, Zhejiang Normal
University, Jinhua, Zhejiang, China
Correspondence:
[*]
Corresponding author: Junwu Kan, Institute of Precision
Machinery, Zhejiang Normal University, Jinhua 321004, Zhejiang, China. Tel.:
+86 579 82286598; Fax: +86 579 82286598; E-mail: jutkjw@yahoo.com.cn
Abstract: To enhance the energy-generating capability and obtain the optimal
structural/material parameters, the deflection function of piezodisc and
analytical model of energy generation is established based on the summation
method in the theory of plates and shells. The influence of
radius/thickness/Young's-modulus ratios of the piezodisc on energy generation
was investigated. The research results show that there are different optimal
thickness/radius/Young's-modulus ratios for a piezodisc generator under given
central force and displacement to obtain maximal electrical energy. To enhance
generated energy of a piezodisc under given central force, low Young's modulus
ratio is helpful. While, high Young's modulus ratio should be utilized for a
piezodisc generator under given central displacement. The Young's modulus
radios of the piezodiscs with beryllium-bronze/brass/aluminum substrates are
1.5/1.1/0.94 respectively, and the optimal
thickness-ratios/radius-ratios/maximal-energy under central force of 25 N are
0.55/0.43/0.35, 0.64/0.67/0.69, and 2.24/2.63/2.96 ×
10^{-4} J. Whereas, those under given central displacement
of 0.25 mm are 0.4/0.35/0.3, 0.85/0.86/0.87, and 2.7/2.19/1.96 ×
10^{-4} J, respectively.
Keywords: Circular piezodisc, energy harvesting, modeling, simulation, summation method
