Finite element analysis is conducted on a barium calcium zirconate titanate $0.5\text{Ba}({\text{Ca}}_{0.8}{\text{Zr}}_{0.2}){\mathrm{O}}_8-0.5({\text{Ba}}_{0.7}{\text{Ca}}_{0.3}){\text{TiO}}_3$(BCZT) material to investigate its energy harvesting performance at different porosities. Porosities are gradually increased to 25% in steps of 5. BCZT piezoceramics attached to a host cantilever beam in unimorph configuration and subjected to base vibration are considered for the present study. Both $d_{31}$ and $d_{33}$ modes are considered. Power is harvested using a load resistance optimized with the structure's natural frequency of vibration. Up to a certain porosity level, an increase in voltage and power is observed in the system. An increment in voltage by ≈95% in $d_{31}$ mode and ≈119% in $d_{33}$ mode is observed at 10% porosity. Power increased by 50% in $d_{31}$ mode and by 53% in $d_{33}$ mode at 5% porosity compared with the nonporous material.

中文翻译：

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孔隙率对0.5Ba（Ca0.8Zr0.2）O3-0.5（Ba0.7Ca0.3）TiO3陶瓷能量收集性能的影响：数值研究

对锆钛酸钡钙钛酸盐进行了有限元分析 $0.5\text{巴}（{\text{钙}}_{0.8}{\text{锆}}_{0.2}）{\mathrm{Ø}}_8-0.5（{\text{巴}}_{0.7}{\text{钙}}_{0.3}）{\text{二氧化钛}}_3$（BCZT）材料来研究其在不同孔隙率下的能量收集性能。孔隙率以5的步长逐渐增加到25％。对于本研究，考虑将BCZT压电陶瓷以单晶形态连接到主悬臂梁并经受基础振动。都$d_{31}$ 和 $d_{33}$模式。使用根据结构固有振动频率优化的负载电阻来收集功率。直至达到一定的孔隙率水平，系统中的电压和功率都会增加。电压增加约95％$d_{31}$ 模式和≈119％ $d_{33}$孔隙率为10％时观察到模态。功率增加了50％$d_{31}$ 模式和53％ $d_{33}$ 与无孔材料相比，孔隙率为5％时的模态。