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.
何秀华， 毕雨时， 王 健， 禚洪彩. 基于ANSYS/Fatigue的泵用压电振子疲劳分析[J]. 排灌机械工程学报, 2011, 29(1): 35-38.
He Xiuhua, Bi Yushi, Wang Jian, Zhuo Hongcai. Fatigue analysis of piezoelectric vibrator for pump based on ANSYS/Fatigue. Journal of Drainage and Irrigation Machinery Engin, 2011, 29(1): 35-38.
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