预应力螺栓对压电换能器性能参数的影响  

Effect of Bolt on the Performance Parameters of Piezoelectric Tranducer

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：《压电与声光》2010年第6期985-986,990,共3页Piezoelectrics & Acoustooptics

基　　金：陕西师范大学研究生培养创新基金资助项目

摘　　要：考虑了压电换能器中的预应力螺栓。当位移节面位于压电陶瓷晶堆中,研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随螺栓的长度、直径和位置的变化规律。结果表明,当螺栓的长度、直径和位置变化时,换能器的共振频率变化可达1.3 kHz,而有效机电耦合系数的相对变化可达25.5%。适当设计螺栓,可提高压电换能器的性能。The bolt of the piezo-electric transducer has been considered.When the nodal area is in the piezoelectric ceramic pile,the effects of the position,the diameter and the length of the bolt on the resonance frequency,the anti-resonance frequency and the effective electro-mechanical coupling coeficient are studied.The result show when changing in the length,diameter and position of the bolt,the resonance frequency of the transducer changes and can reach 1.3 kHz,and the relative change of effective electro-mechanical coupling coefficient can be up to 25.5%.If the bolt is designed appropriately,the performance of the piezo-electric transducer can be improved.

关 键 词：夹心式压电换能器 螺栓 共振频率 反共振频率 有效机电耦合系数 

分 类 号：TB552[理学—物理]