径向振动匹配层换能器的设计参数及模态优化

Design parameters and modal optimization of radial vibration matching layer transducer

设计基于匹配层外壳的径向振动换能器,分析匹配层材料、换能器直径、压电振子厚度对换能器模态振型的影响,并结合设计频率下最佳模态振型优化换能器设计参数。结果表明:树脂基匹配层显著提高换能器在空气介质中的发射效率。随着换能器直径减小、压电振子厚度增加,径向振动换能器激振效率提高。优化的换能器直径为100 mm,压电振子厚度为10 mm,在第三阶谐振频率为34 729 Hz时,可实现高效率、高质量振动辅助研磨加工。

The radial vibration transducer based on the matching layer shell was designed.The influences of the material of the matching layer,the diameter of the transducer and the thickness of the piezoelectric vibrator on the modal shape of the transducer were investigated.Due to the optimal modal shape at the design frequency,the design parameters of the transducer were optimized.The results show that the emission efficiency of the transducer in air medium is greatly improved by the resin based matching layer.As the diameter of transducer decreases and the thickness of piezoelectric vibrator increases,the excitation efficiency of radial vibration transducer increases.The optimized transducer diameter is 100 mm,and the thickness of piezoelectric vibrator is 10 mm.It can achieve high efficiency and high quality vibration assisted lapping when it works at the third resonance frequency of 34 729 Hz.