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多铁性材料磁电复合结构的单一振动模式可分为纵向振动、径向振动和弯曲振动。本文提出的多模式耦合振动的概念,是指多个独立的振动模式通过一定的耦合方式共同对系统的磁电效应作出贡献。本文分析了径-纵耦合振动模式的Core-Shell模型。结果表明,调节与各振动模式对应的尺寸,可以改变不同振动模式的振动状态,当不同振动模式的共振峰靠近或重合时,可以实现比单一振动模式更为理想的磁电效应。另外,从结果中可以看到,Core-Shell模型中当不同振动模式所对应的共振峰重合时,磁电系数有了非常显著的提高。本文提出的多模式耦合振动的概念,可为多铁性材料磁电复合结构优化设计提供理论指导。
The single vibration mode of multiferroic material magnetoelectric composite structure can be divided into longitudinal vibration, radial vibration and bending vibration. The concept of multi-mode coupling vibration proposed in this paper means that multiple independent vibration modes contribute to the magnetoelectric effect of the system through certain coupling modes. In this paper, Core-Shell model of radial-longitudinal coupling vibration mode is analyzed. The results show that adjusting the size corresponding to each vibration mode can change the vibration state of different vibration modes. When the resonance peaks of different vibration modes approach or coincide, the magnetoelectric effect that is better than the single vibration mode can be achieved. In addition, it can be seen from the results that when the resonance peaks corresponding to different vibration modes overlap in the Core-Shell model, the magnetoelectric coefficient has a very significant increase. The concept of multi-mode coupling vibration proposed in this paper can provide theoretical guidance for the optimization design of multi-iron material magnetoelectric composite structure.