基于ANSYS/Fatigue的泵用压电振子疲劳分析

doi:10.3969/j.issn.1674-8530.2011.01.008

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Abstract In order to predict fatigue life of the piezoelectric vibrator used in piezoelectric pump, the finite element model of bimorph piezoelectric vibrator was made and static analysis was carried out by using ANSYS software. The equivalent stress contours were obtained, and the danger points were found out. Then the fatigue analysis was carried out to those danger points by applying ANSYS/Fatigue module and was compared with the other concentrated points. Consequently the fatigue consumption coefficients were obtained. Thus the bimorph piezoelectric vibrator strength and fatigue life could be predicated effectively by the Miner rule. The model was also applied to study the effect of different base materials and structural parameters to the bimorph piezoelectric vibrator fatigue life and was compared with the single-chip piezoelectric vibrator. The results show that the best base material is Cu, radius does not affect the fatigue life, and different thicknesses make larger effect than voltage to the fatigue life. In addition, bimorph piezoelectric vibrator are always longer than the single-chip one, which provides a theoretical basis for selecting and improving the structure of piezoelectric vibrator.

Key words：

piezoelectric pump piezoelectric vibrator fatigue analysis consumption coefficient fatigue life

Received: 05 May 2010 Published: 30 January 2011

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	Articles by authors
	HE Xiu-Hua
	Bi-Yu-Shi
	Wang-　Jian
	Zhuo-Hong-Cai

Cite this article:

HE Xiu-Hua,Bi-Yu-Shi,Wang-　Jian等. Fatigue analysis of piezoelectric vibrator for pump based on ANSYS/Fatigue[J]. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(1): 35-38.

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http://zzs.ujs.edu.cn/pgjx/EN/10.3969/j.issn.1674-8530.2011.01.008 OR http://zzs.ujs.edu.cn/pgjx/EN/Y2011/V29/I1/35

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