摘要
通过对压电驱动器的软件计算结果与实验结果的差异进行研究总结,利用变形后压电驱动器中各个结构部分的应力应变分布特点,结合复合层合材料力学、梁力学模型和压电材料非线性模型理论构造出压电薄片与基体材料的简化耦合模型,从而建立结构的非线性模型。模型计算结果比软件计算结果更符合实验结果,形式更简单,物理意义更明确。再利用该模型对不同结构参数下的压电驱动器性能进行分析,直观地反应出压电驱动器各结构参数对驱动器性能的影响。
Based on composite material theories, Euler--Bernoulli beam theory and nonlinear constitutive equation of piezoelec- tric materials, and in combination with the characteristics of the distribution of stress and strain of actuators which is summa- rized and concluded through comparing the computer-code-computated results and the experiment ones, a model for the cou- pling relationship between the substrate and the piezoelectric sheet is proposed and subsequently a nonlinear model for the bi- morph actuator is built. The proposed analytical nonlinear model features simplicity and concise physical meaning. It is shown that the results obtained by this model is more consistent with that of the experiment than by the computer codes. For applica- tion, the characteristics of the piezoelectric devise with different structure parameters are analyzed with the analytical model and thereby the influence of structure parameters on the performance of the piezoelectric actuator is clearly indicated.
出处
《振动工程学报》
EI
CSCD
北大核心
2013年第6期839-845,共7页
Journal of Vibration Engineering
关键词
压电材料
悬臂梁
模型简化
非线性模型
piezoelectric material
cantilever beam
modal simplification
nonlinear model
