Modeling and Analysis of a Piezoelectric Energy Harvester with Varying Cross-Sectional Area

Table 1

Geometric and material properties of the bimorph harvester.

Length of the beam [mm]	50.8	Mass density of the substructure [kg/m^3]	9000
Width of the beam on the clamped end [mm]	31.8	Mass density of the PZT [kg/m^3]	7800
Width of the beam on the free end [mm]	31.8	Tip mass [kg]	0.012
Thickness of the substructure [mm]	0.14 (each)	Proportional constant (rad/s)	14.65
Thickness of the PZT [mm]	0.26 (each)	Proportional constant (s/rad)	10^−5
Young’s modulus of the substructure [GPa]	105	Piezoelectric coupling coefficient [pm/V]	−190
Young’s modulus of the PZT-5A [GPa]	66	Permittivity of free space [pF/m]	8.854