CAJ | 학술논문

基于表观弹性理论,给出了压电陶瓷晶堆处于不同位置时耦合振动换能器的设计方法.在理论推导的基础上,借助有限元软件Ansys,研究了晶片位置对换能器耦合振动特性的影响.结果表明,随着陶瓷晶堆远离换能器位移节面,有效机电耦合系数和动态电容逐渐减小,静态电容、动态电阻和动态电感增大.同时,加工了相应尺寸的换能器,对其性能参数进行了测试,理论计算和实验测量结果符合较好.
기우표관탄성이론,급출료압전도자정퇴처우불동위치시우합진동환능기적설계방법.재이론추도적기출상,차조유한원연건Ansys,연구료정편위치대환능기우합진동특성적영향.결과표명,수착도자정퇴원리환능기위이절면,유효궤전우합계수화동태전용축점감소,정태전용、동태전조화동태전감증대.동시,가공료상응척촌적환능기,대기성능삼수진행료측시,이론계산화실험측량결과부합교호.
Based on the apparent elasticity theory, a design method for the transducer in coupled vibration is given when the piezoelectric ceramic elements are placed in different position of the transducer. The influence of piezoelectric ceramics position on coupled vibration of transducer is studied by employing finite element software Ansys. It is concluded that, as the piezoceramic elements are far from the displacement node of the transducer, the effective electromechanical coupling factor and the dynamic capacitance are decreased gradually. Meanwhile, the static capacitance, the dynamic resistance and the dynamic inductance are increased. The theoretical results are verified experimentally.