Lv Ning, Zhong Chao, Wang Jiacheng, Wang Likun
Beijing Key Laboratory for Sensor, Beijing Information Science & Technology University, Beijing 100192, China.
Materials (Basel). 2021 Jun 30;14(13):3661. doi: 10.3390/ma14133661.
In this work, the bending vibration characteristics of the 2-2 piezoelectric composite trilaminar vibrator are studied by the finite element simulation and experiment. The simulation results show that the trilaminar vibrator has lower resonant frequency and larger vibration displacement under the fixed boundary condition compared with that of the free boundary condition, and its performance is relatively good. Then, the 2-2 piezoelectric composite and piezoelectric ceramic trilaminar vibrators are fabricated and their performances are tested under the fixed boundary condition. The experimental and simulation results show that the vibrator has pure bending vibration characteristics in the frequency band of 1.2-1.4 kHz, especially the 2-2 piezoelectric composite vibrator, which has lower frequency, higher electromechanical coupling coefficient and larger bending vibration displacement; thus, the 2-2 piezoelectric composite trilaminar vibrator is a better choice for the fabrication of a low-frequency transducer.
在这项工作中，通过有限元模拟和实验研究了2-2型压电复合三层振动器的弯曲振动特性。模拟结果表明，与自由边界条件相比，三层振动器在固定边界条件下具有更低的共振频率和更大的振动位移，其性能相对较好。然后，制作了2-2型压电复合材料和压电陶瓷三层振动器，并在固定边界条件下测试了它们的性能。实验和模拟结果表明，该振动器在1.2-1.4kHz频段具有纯弯曲振动特性，特别是2-2型压电复合材料振动器，其频率更低、机电耦合系数更高且弯曲振动位移更大；因此，2-2型压电复合三层振动器是制造低频换能器的更好选择。
