中文摘要：

依据Hamilton变分原理，运用有限元方法建立了用于磁场传感器的核心元什—磁电复合材料动态特性的有限元模型。应用所建立的模型求解了LT型Terfenol—D／PZT／Terfenol—D三层磁电复合材料的输出特性，并与实验结果进行对比分析。结果发现当静态偏置磁场为22．1kA／m，正弦交流驱动磁场为7．4kA／m、频率100Hz时，计算结果和实验结果误差为0．9％。表明该模型适用于磁电复合材料输出特性为线性变化的区域。

英文摘要：

According to Hamilton variational principle, an efficient finite element model is presented for the dynamic characteristics of magnetoelectric composites that can be used as the center element of magnetic sensor. The outputvoltage characteristic of Terfenol-D/PZT/Terfenol-D three layered magnetoelectric composite is analyzed and calculated. Calculation results show that when the static bias magnetic field is 22.1 kA/m, alterative current magnetic field is 7.4 kA/m and the frequency is 100 Hz, the error between calculation result and experiment result is 0.9%. This indicates that the model is suitable when the output characteristic of magnetoelectric composite is in the linear range.