采用弹性基底的磁电复合结构有限元分析

介绍了一种将磁致伸缩材料和压电材料粘贴于弹性基底上构成的磁电复合结构,并针对Terfenol-D尺寸确定情况下,PZT-5H长度及弹性基底长度对结构一阶纵向谐振时的磁电特性的影响,采用有限元方法进行了优化分析和设计。结果表明:PZT-5H的最优长度与Terfenol-D等长时,弹性基底存在最优长度,可使结构磁电转换系数最高,且改变弹性基底长度可以调整结构的谐振频率,并进行了实验验证。

Finite-element Analysis of the Magnetoelectric Composite Using Elastic Substrate

A magnetoelectric composite by bonding magnetostrictive and piezoelectric materials onto an elastic substrate is presented.The magnetoelectric composite using elastic substrate is analyzed by finite-element analysis.Given the dimensions of Terfenol-D,the influences of the length of PZT-5H and the elastic substrate on the magnetoelectric behaviors at the first-order longitudinal resonant are presented.Results show that the optimized length of PZT-5H is equal to the length of Terfenol-D.When the lengths of Terfenol-D and PZT-5H are equal,the optimized length of elastic substrate makes the magnetoelectric voltage coefficient of the magnetoelectric composite highest,and the resonance frequency of the magnetoelectric composite is controllable by changing the length of the elastic substrate.The results are validated by the experiments.