| 液体-压电晶片界面上电边界条件对兰姆波激发的影响 |
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| 引用本文： | 马伟方,侯毅,施文康,邓明晰. 液体-压电晶片界面上电边界条件对兰姆波激发的影响[J]. 声学技术, 2001, 20(1): 4-9 |
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| 作者姓名： | 马伟方 侯毅 施文康 邓明晰 |
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| 作者单位： | 1. 上海交通大学,
2. 后勤工程学院, |
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| 基金项目： | 本课题受上海市科技发展基金资助 |
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| 摘 要： | 本文对液体-压电晶片结构中，不同电边界条件下叉指换能器所激发的兰姆波传播特性进行了分析研究，给出了不同电边界条件下兰姆波的相速度、叉指换能器激发兰姆波的机电耦合系数与压电晶片的归一化厚度、晶体切向之间的关系曲线，为实际设计中电边界条件的正确选择提供了理论基础。
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| 关 键 词： | 电边界条件；兰姆波；有效介电常数 |
| 文章编号： | 1000-3630(2001)01-0004-03 |
| 收稿时间： | 2000-05-29 |
| 修稿时间： | 2000-05-29 |
Influence of electrical boundary conditions on lamb wave excitation at the interface of liquid and piezoelectric substrate |
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| MA Wei-fang,HOU Yi,SHI Wen-kang and DENG Ming-xi. Influence of electrical boundary conditions on lamb wave excitation at the interface of liquid and piezoelectric substrate[J]. Technical Acoustics, 2001, 20(1): 4-9 |
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| Authors: | MA Wei-fang HOU Yi SHI Wen-kang DENG Ming-xi |
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| Affiliation: | MA Wei fang 1,HOU Yi 1,SHI Wen kang 1,DENG Ming xi 2 |
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| Abstract: | This paper analyzes the influence of electrical boundary conditions on the propagation of Lamb waves generated by the interdigital transducer (IDT) at the interface of liquid and piezoelectric substrate. The curves of the phase velocities and the IDT electromechanical coupling coefficients as a function of normalized thickness of the piezoelectric substrate and crystal orientation on different electrical boundary conditions are presented too. It provides the theoretical basis for the selection of electrical boundary conditions in practice. |
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| Keywords: | electrical boundary condition Lamb wave effective permittivity |
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