摘要
双压电膜是由压电材料层、环氧树脂层、金属层组成的复合薄圆板。将多层双压电膜组合在一起构成管内移动微小机器人的驱动器。文章基于压电和金属材料的弹性薄板理论 ,应用瑞利 -李兹近似求解法 ,推导了在固支与简支两种边界条件下 ,双压电膜的弯曲振动的固有频率与相对应的振型的计算表达式。将理论计算与有限元分析的结果进行对比分析 ,结果表明 ,两者的计算结果吻合好 ,验证理论分析的正确性。分析与讨论了压电层与金属层的厚度对固有频率的影响。
Piezoelectric bimorph,which consists of metal thin circular plate having PZT on both sides,is used as actuators of in pipe micro locomotive mechanism.Based on thin plate elastic theory of piezoelectric and metal material combined with the Rayleigh Ritz method,equation for the calculation of resonance frequencies and modes shape of bending modal of structure are derived for two different boundary conditions.As an example,a piezoelectric bimorph with elastic simple support and rigid slipping support is considered,the results obtained from formulation are in very good agreement with those by means of Finite Element Method(FEM),the consistency of the theory and numerical results proved the accuracy and validity of theory model.The effect of thickness of metal and PZT on the resonance frequencies is also discussed.All study provides theoretical foundation for optimal design of actuator for in pipe micro locomotive mechanism.
出处
《压电与声光》
CSCD
北大核心
2002年第2期111-115,共5页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目 (5 0 175 19)
哈尔滨工业大学校基金资助项目 (HIT.2 0 0 0 .60)
关键词
双压电复合薄圆板
驱动器
理论分析
bimorph
thin elastic plate theory
Rayleigh Ritz method
FEM
