南京大学学报(自然科学版) ›› 2012, Vol. 48 ›› Issue (5): 537543.
张小丽,林书玉,付志强,王勇,胡文旭
Zhang Xiao一Li,Lin Shu-Yu**,Fu Zhi一Qiang ,Wang Yong,Hu Wen-Xu
摘要: 木文提出了一种新型的柱形压电超声换能器,其结构包含:夹心式纵向压电换能器,大尺寸各向同性空心圆柱体及前、后盖板.基于表观弹性法,通过引入等效弹性常数及等效机电祸合系数,得出了空心圆柱的等效电路.根据近似解析法,研究了该换能器的祸合振动情况,并给出了其机电等效电路及共振频率方程.利用有限元软件ATILA模拟了该换能器的振动位移分布及声场分布,可以看出该换能器能够产生纵向和径向超声.从分析结果可以看出,两种方法具有很好的一致性.该祸合振动换能器为超声波液体处理系统提供了参考.
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