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New acoustic plate modes with Quasi-Linear polarizations

机译:具有准线性极化的新型声学板模式

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New acoustic plate modes (APMs) with quasishear- vertical (QSV) and quasi-shear-horizontal (QSH) polarizations are found numerically in piezoelectric, nonpiezoelectric, and isotropic plates with free faces. Experimental verification of the modes is accomplished for ST,X-quartz plate, as an example. Similar to the modes with quasi-longitudinal displacement reported recently, the new counterparts exist when their velocities vAPM are close to the velocities vBAW of the relevant bulk waves, the value of the dispersion slope dvAPM/d(h/;B;) is low enough (dvAPM/d(h/;B;) ~100 m/s, where h is thickness and ;B; is wavelength), and allowable plate thickness h/;B; form a regular succession. All modes with quasi-linear polarization originate from generalized Lamb modes transformed at the aforementioned conditions.
机译:在具有自由面的压电,非压电和各向同性板中,在数值上发现了具有准垂直(QSV)和准剪切-水平(QSH)极化的新型声学板模式(APM)。例如,以ST,X石英板完成了模式的实验验证。与最近报道的准纵向位移模式类似,当速度 v APM接近相关体波的速度 v BAW时,存在新的对应物。色散斜率dvAPM / d(h /; B;)的值足够低( dv APM / d(h /; B;)〜100 m / s,其中h是厚度,; B;是波长),以及允许的板厚h /; B;定期继承。所有具有准线性极化的模式都源自在上述条件下转换的广义Lamb模式。

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