环形压电振子面内弯曲模态特征及控制  

Bending Vibration Characterization and Modal Controlof Ring Type Piezoelectric Vibrator

作　　者：何勍[1] 王丹妮[1] 王宏祥[1] 

机构地区：[1]辽宁工业大学振动工程研究所,辽宁锦州121001

出　　处：《压电与声光》2010年第4期585-587,共3页Piezoelectrics & Acoustooptics

基　　金：国家自然基金资助项目(50675094)

摘　　要：以超声物料输送装置的环形压电振子为研究对象,分析了环形封闭梁结构的模态特征,指出环形压电振子的面内弯曲振动,其偶数阶模态关于两对称轴均对称或关于中心对称,而奇数阶模态分别关于两对称轴对称。提出了在压电环梁上开设合适的沟槽来控制压电梁的满足行波驱动的振型及频率差的方法,并根据优化结果试制了压电输送振子,通过实验验证了模态控制的可行性。Taking ring type piezoelectric vibrator of ultrasonic feeding device as research object,the modal characteristics of the vibrator consisting of straight and curved beams has been investigated.The even-order modes of the vibrator are symmetrical about the two axes of symmetry or the center,and one of the odd-order modes is symmetrical about x axis,the other is symmetrical about y axis.The control method of the mode of vibration and frequency difference meeting traveling wave driving through designing appropriate grooves at the vibrator is proposed,and the vibrator prototype has been manufactured in accordance with optimal result.The feasibility of modal control method has been verified through experimental study.

关 键 词：环形压电振子 行波 面内弯曲 模态分析 超声物料输送 

分 类 号：TN384[电子电信—物理电子学] TB535[理学—物理]