三叠片压电复合换能器弯曲振动的比较研究

发布时间：2018-03-07 04:18

本文选题：瑞利法　切入点：谐振频率　出处：《声学技术》2017年04期 　论文类型：期刊论文

【摘要】：用瑞利法对三叠片弯振圆盘换能器在三种不同边界条件下的振动特性进行理论研究,推导了谐振频率及有效机电耦合系数的表达式,通过数值计算分析了复合换能器的谐振频率及有效机电耦合系数随换能器各结构参数的变化规律并进行比较研究,同时将计算结果与有限元模拟结果比较,结果表明不同边界条件下换能器的结构参数对谐振频率和有效机电耦合系数影响不同:在换能器结构参数一定时,自由边界条件下谐振频率最大,简支边界条件下最小,固定边界条件下次之;有效机电耦合系数随着金属片厚度、陶瓷片厚度和陶瓷片半径变化时,分别有一个最大值;其他参数一定时,有效机电耦合系数在简支边界条件下最大,自由边界条件下的值稍大于固定边界条件下的值。上述研究结果可为三叠片弯曲振动换能器的设计和实际应用提供一定的理论支持。
[Abstract]:By using Rayleigh method, the vibration characteristics of triple-laminated flexural disk transducer under three different boundary conditions are studied theoretically, and the expressions of resonant frequency and effective electromechanical coupling coefficient are derived. The variation of resonant frequency and effective electromechanical coupling coefficient of the composite transducer with the structural parameters of the transducer is analyzed and compared with that of the finite element simulation, and the calculated results are compared with the results of the finite element simulation. The results show that the structural parameters of the transducer have different effects on the resonant frequency and the effective electromechanical coupling coefficient under different boundary conditions: when the structural parameters of the transducer are fixed, the resonant frequency is the largest under the free boundary condition and the minimum under the simple boundary condition. Under the fixed boundary condition, the effective electromechanical coupling coefficient has one maximum value with the thickness of metal sheet, ceramic plate thickness and ceramic radius, and the effective electromechanical coupling coefficient is the largest under simply supported boundary condition when the other parameters are fixed. The value under free boundary condition is slightly larger than that under fixed boundary condition. The above results can provide some theoretical support for the design and practical application of triple-plate bending vibration transducer.
【作者单位】：渭南师范学院数理学院;
【基金】：国家自然科学基金资助项目(11074158) 陕西省军民融合研究基金项目(17JMR35) 渭南师范学院校级项目(17YKS08);渭南师范学院校级教改项目(JG201648)
【分类号】：TB552

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