有限液体负载下压电平板声板波理论分析

The theoretical analysis of acoustic plate wave in piezoelectric plate with finite fluid loading

Department of Mechanical Engineering, National Taiwan University, Taipei, Taiwan, ChinaDepartment of Mechanical Engineering, National Taiwan University, Taipei, Taiwan, China

摘要: 主要推导平板声板波受有限液体负载后能量衰减与波速改变情形,以部分波传理论分析该受液体负载的压电平板波传行为,并以一128$^{\circ}Y$向切角的铌酸锂芯片为例,分析前20个声板波受水与甘油负载下的能量衰减,并固定某一平板板波, 针对不同甘油厚度负载下,计算其相速度与衰减变化,该理论分析对于液体负载下的平板板波传感器应用具有极大的参考价值.
- 压电平板 /
- 板波模态 /
- 部分波传理论 /
- 黏滞性传感器 /
- 有限厚度液体
Abstract: This article presents the attenuations and phase shiftsof the acoustic plate wave modes (APMs) with finite liquid loading inpiezoelectric plates. The partial wave theory is applied to analyze apiezoelectric plate loading with liquid. The first 20 APMs in128$^{{\circ}}$YX+90$^{{\circ} }$LiNbO$_{3}$ plate with DI water andglycerol loading are theoretically calculated. The variation of phasevelocity and attenuation of APMs with different thickness of glycerol alsopresented. The results shown in this paper are essential for using the APMsin the designs of liquid phase sensors.
- piezoelectric plate /
- acoustic plate modes /
- partial wave theory /
- viscous sensors /
- finite thickness fluid

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