本文利用聲子晶體共振腔與壓電材料來當作能量擷取裝置來轉換電能，並利用實驗應證。首先，以平面波展開法配合超晶胞法求得聲子晶體共振腔的共振頻率，得到共振腔內局部化聲波的頻率，再放置壓電複合層型曲樑於共振腔內，藉由聲壓產生外力，推動壓電複合層型曲樑而得到電壓。在預測所產生的電壓方面，使用漢米爾頓原理來推導壓電複合層型曲樑的動態運動方程式，並利用壓電理論，進而推導出產生的電壓，當不同的外加電阻作用下，找出產生最大功率的電阻值。
最後，以實驗來應證能量擷取所產生的電壓與功率，並加以比對，證明含壓電樑聲子晶體共振腔之聲能能量擷取是可以分析與應用。

In this study, the resonant cavity of phononic crystals and the piezoelectric material are combined to act as an energy harvesting device. The acoustic energy can be converted to electrical energy. The plane wave expansion method and supercell method are used to obtain the resonant frequency of the cavity in two-dimension phononic crystals. The acoustic waves at resonant frequency can be localized in the cavity of the sonic crystal. The piezoelectric laminated curved beam is placed in the resonant cavity, and vibrated by the sound pressure in the cavity. The acoustic energy harvesting can be achive to electrical energy. In order to predict the output voltage and power, the dynamic governing equation of the piezoelectric laminated curved beam is derived by using the Hamilton’s principle. The piezoelectric theory is also employed to calculate the output voltage and power. With the suitable external resistance, the maximum output power can be obtained.
Finally, the results of calculation for the output voltage and power are confirmed by the experiment. And, we compare the results of experiment with calculation and simulation. The acoustic energy harvesting by using phononic crystals with a piezoelectric beam in the resonant cavity are analyzable and applicable.

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