Finite element modeling of beam bimorph piezoelectric power harvesters including visco-elasticity

S. D. Yu; S. He; W. Li

doi:10.1117/12.839443

20 October 2009 Finite element modeling of beam bimorph piezoelectric power harvesters including visco-elasticity

S. D. Yu, S. He, W. Li

Proceedings Volume 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering; 749303 (2009) https://doi.org/10.1117/12.839443
Event: Second International Conference on Smart Materials and Nanotechnology in Engineering, 2009, Weihai, China

Abstract

This paper presents a finite element procedure for modeling beam bimorph piezoelectric power harvesters including viscoelasticity. A three node beam finite element is employed to model the longitudinal and flexural response of the piezoelectric structure carrying an offset proof mass. Within a beam finite element, the proposed element permits a quintic polynomial shape function for lateral deformations and a quadratic polynomial shape function for the longitudinal deformation. The dynamic equations of the electromechanical system are established using the Lagrange equations method and solved for harmonic base motions. A series of experiments were carried out to quantify the visco-elasticity constant of a piezoelectric structure and validate the simulation results. Excellent agreement was observed between the measurement and simulation data for a range of operating parameter.

Citation Download Citation

S. D. Yu, S. He, and W. Li "Finite element modeling of beam bimorph piezoelectric power harvesters including visco-elasticity", Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 749303 (20 October 2009); https://doi.org/10.1117/12.839443

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