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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Finite element analysis of periodic and random 2-2 piezocompositetransducers with finite dimensions
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Finite element analysis of periodic and random 2-2 piezocompositetransducers with finite dimensions

机译：周期性和随机2-2压电复合换能器的有限元分析

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A finite size periodic 2-2 composite transducer has been studiednusing finite element method, and the numerical results are verified bynexperiments. The focus of this study is on the mode coupling between thenthickness resonance and pitch resonance. Such coupling effectivelynlimits the pitch size of the composites preventing them being used innhigh frequencies. The effects of randomness is also being investigatednusing finite element analysis. The pitch resonance can be effectivelynsuppressed by introducing 50 to 80% randomness in the structure.nNumerical results also show that the decoupling of the thicknessnresonance and pitch resonance can increase the electromechanicalncoupling coefficient kt for the thickness mode and shifts thenthickness resonance frequency
机译：利用有限元方法研究了一种有限尺寸的周期2-2复合换能器，并通过实验验证了数值结果。这项研究的重点是厚度共振和音高共振之间的模式耦合。这种耦合有效地限制了复合材料的螺距尺寸，从而阻止了它们在高频中使用。也正在使用有限元分析来研究随机性的影响。通过在结构中引入50％到80％的随机性可以有效地抑制螺距共振。数值结果还表明，厚度共振和螺距共振的解耦可以增加厚度模式下的机电耦合系数kt，从而改变厚度共振频率

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