Analysis of the Harmonic Frequency to Piezoelectric Ceramic Embedded in Concrete

A research about the vibration mode of piezoelectric ceramic( PZT-5H) based on ANSYS has been made, combining with harmonic response algorithm to obtain three different regions of vibration-frequency curve of piezoelectric ceramic,realizing the simulation of acoustic pressure cloud picture of the electronic-acoustic system with embedded type of piezoelectric concrete module while coupling piezoelectric ceramic and concrete units,and further receiving the maximum acoustic pressure and acoustic fields distribution under different excitation frequency. The results shows that the piezoelectric ceramic has four maximum amplitude points in 20 kHz ~ 100 kHz. Along with the increase of harmonic frequency,and the increase of amplitude,the vibration distribution takes on the variation trend of scattering before concentration; through the analysis of harmonic response,it shows that different regions of piezoelectric ceramic acoustic radiant surface all has the maximum vibration-frequency nearby 80 kHz; according to the analysis of acoustic fields of electronic-acoustic system,if the excitation frequency is 79. 666 kHz,the acoustic pressure is the maximum,the acoustic fields is the best and the acoustic directivity is concentrated.