运用等效电路法,对磁致,压电层合材料谐振状态下的磁电响应进行分析,得到了材料在谐振状态下的磁电电压转换系数理论计算公式.详细地分析了磁致,压电层合材料在谐振点附近的磁损耗、机械损耗、电损耗,并给出了各种损耗相应的计算方法和大小,发现谐振状态下,材料的主要损耗来源于机械损耗.分析结论较好地解释了磁电层合材料在不同偏置磁场下磁电响应的实验结果.
The theoretical analysis of resonance magnetoelectric (ME) performances in longitude-transverse type magnetostrictive/ piezoelectric laminated composite is presented in this paper based on the equivalent circuit method, and the formula of ME voltage coefficient is obtained, which is useful to the composite design and optimization. To evaluate the ME voltage coefficient near the resonance, the losses such as eddy-current loss, mechanical loss, and dielectric loss are considered and formulated, which indicates that the mechanical loss plays the key role in dissipation. The analysis, which takes losses into account, gives better explanations to current experimental values.