一种分析非均匀厚度1-3型压电复合材料换能器性能的方法

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Abstract 1-3 piezoelectric composites transducers with non-uniform thickness which have characteristics of wide bandwidth are widely used in the fields of underwater ultrasonic testing, sonic logging, and ultrasonic imaging.In this paper, an equivalent circuit model of a parallel-connected resonator arrays was proposed to analyze the vibration and performance of the transducer.When a 1-3 piezoelectric composite plate was designed to have a gradually varying thickness, the plate could be regarded as composed of parallel-connected oscillator arrays with various thicknesses.And a 3D thickness-stretching vibration model was employed to analyze the single resonator unit.Impedance of non-uniform thickness 1-3 piezoelectric composite transducer was achieved.To verify the theory, a transducer using a flat-concave 1-3 piezoelectric composite plate was fabricated.The experiment results agree well with the theory, indicating that the equivalent circuit model of a parallel resonator array is well suitable for accurately predicting the performance of the 1-3 piezoelectric composite with non-uniform thickness.The transducer bandwidth is mainly determined by on its thickness variation.The research results can be used as guidelines for the design of the transducer with non-uniform thickness.

Key words： non-uniform thickness 1-3 piezoelectric composites equivalent circuit model of the parallel oscillator impedance

Received: 21 November 2017 Published: 15 April 2019

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	Articles by authors
	SUN Yingqi
	ZENG Deping
	ZHANG Chunyang
	XU Jiaqi
	ZHANG Jingni
	GONG Yang
	HE Qian
	GAO Xuemei
	YANG Zengtao

Cite this article:

SUN Yingqi,ZENG Deping,ZHANG Chunyang, et al. A method on analyzing the performance of a 1-3 piezoelectric composites with non-uniform thickness[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(8): 75-79.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I8/75

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