解耦(概率)
异质结
振动
模耦合
联轴节(管道)
多模光纤
声学
波数
材料科学
正常模式
模态分析
数值分析
物理
作者
Zinan Zhao,Weiqiu Chen
出处
期刊:IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control
[Institute of Electrical and Electronics Engineers]
日期:2022-01-01
卷期号:: 1-1
标识
DOI:10.1109/tuffc.2022.3160162
摘要
Mode coupling between the operation mode and unwanted eigenmodes has a significant influence on the working performance of novel thin-film magnetoelectric (ME) devices operating at high frequencies. In this paper, the extended Frequency Spectrum Quantitative Prediction (FSQP) method is used to investigate mode-coupling vibrations in high-frequency ME heterostructures. This method has three key procedures: first, wave propagation in ME heterostructures is studied to determine the wavenumber and frequency of the eigenmodes; second, the variational formulation of a general ME heterostructure is constructed; and finally, frequency spectra for predicting the coupling strength among the eigenmodes are obtained by substituting the solutions consisting of all eigenmodes into the variational formulation. Two numerical examples are presented to validate the extended FSQP method. The mode shapes of the mechanical displacements are used to thoroughly describe the mode-coupling behavior in different vibration modes. The numerical results show that the mode-coupling strength is significantly affected by the structural size and number of layers in an ME heterostructure. Furthermore, structural symmetry along the thickness direction may cause specific mode-decoupling phenomena. Effective strategies for suppressing multimode coupling vibrations in ME heterostructures by optimizing the lateral aspect ratios based on the frequency spectra are proposed to guide device design.
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