Table 1.
Material parameters of the configuration.
| Piezoelectric material: PVDF (Jinzhou Ke-xin electronic materials Co. Ltd) | |||||
|---|---|---|---|---|---|
| Piezoelectric constants (pC/N) |
d31 | 23.9 | Coupling coefficients | k31 | 0.14 |
| d33 | -32.5 | k33 | 0.19 | ||
| Young’s modulus (GPa) | E | 4.18 | Density (kg/m3) | ρb | 1700 |
| Elastic constants (10−11Pa−1) |
s11 | 23.9 | Relative dielectric constant | εr | 13 |
| s12 | -7.18 | Mechanical quality factor | Qm | 17.2 | |
| s13 | -7.18 | Damping factor in air | ξ | 0.0291 | |
| s44 | 62.2 | Thickness (μm) | tb | 50 | |
| s66 | 62.2 | Yield strength (MPa) | σyield | 50 | |
| Seismic mass material: 45# steel (Yong-teng-da machinery Co. Ltd) | |||||
| Young’s modulus (GPa) | E | 200 | Poisson’s ratio | υ | 0.29 |
| Density (kg/m3) | ρm | 7800 | |||