螺栓对压电换能器性能参数的影响  

Effect of the bolt on the performance parameters of piezoelectric transducer

作　　者：李军[1] 贺西平[1] 丁少虎[1] 

机构地区：[1]陕西师范大学应用声学研究所,陕西西安710062

出　　处：《陕西师范大学学报（自然科学版）》2008年第4期43-46,共4页Journal of Shaanxi Normal University：Natural Science Edition

基　　金：陕西省自然科学基金资助项目(2007A07);陕西师范大学研究生培养创新基金资助项目(2007CXS024)

摘　　要：考虑到螺栓的影响,把螺栓等效为四端网络计入换能器的机电等效电路,推导了位移节面位于金属块中时压电换能器的频率方程,探究了压电换能器的共振频率、反共振频率和有效机电耦合系数等性能参数随螺栓的几何尺寸和位置的变化规律.结果表明,适当变化螺栓的长度、位置和直径,可以使换能器的有效机电耦合系数增大,从而优化换能器的性能.The bolt is considered as a four-end network of the equivalent circuit in the transducer. The resonance frequency equation of the transducer, whose displacement node is located at the metal, is derived. The effects of the position, the diameter and length of the bolt on the resonance frequency, the anti-resonance frequency and effective electro-mechanical coupling coefficient are studied. Uhe results show that changing the length, the position and diameter of the bolt appropriately can make the efffective electro-mechanical coupling coefficient of the transducer increase, thus optimize the performance of the piezoelectric transducer.

关 键 词：压电换能器 螺栓 共振频率 反共振频率 机电耦合系数 

分 类 号：O426.2[理学—声学]