Abstract
The dynamic characteristics of a quartz crystal resonator (QCR) in thickness-shear modes (TSM) with the upper surface covered by an array of micro-beams immersed in liquid are studied. The liquid is assumed to be inviscid and incompressible for simplicity. Dynamic equations of the coupled system are established. The added mass effect of liquid on micro-beams is discussed in detail. Characteristics of frequency shift are clarified for different liquid depths. Modal analysis shows that a drag effect of liquid has resulted in the change of phase of interaction (surface shear force), thus changing the system resonant frequency. The obtained results are useful in resonator design and applications.
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Project supported by the National Natural Science Foundation of China (Nos. 11272127 and 51425006), the Research Fund for the Doctoral Program of Higher Education of China (No. 20130142110022), and the Grant from the Impact and Safety of Coastal Engineering Initiative Program of Zhejiang Provincial Government at Ningbo University (No. zj1213)
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Xie, X., Kong, L., Wang, Y. et al. Coupled vibrations and frequency shift of compound system consisting of quartz crystal resonator in thickness-shear motions and micro-beam array immersed in liquid. Appl. Math. Mech.-Engl. Ed. 36, 225–232 (2015). https://doi.org/10.1007/s10483-015-1902-7
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DOI: https://doi.org/10.1007/s10483-015-1902-7