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Paper is presented the theory of influence of the external electric field E on propagation of Lamb waves in thin piezoelectric sheets. Basic equations and boundary conditions are used to obtain some formulas for computer simulation. E-influence on properties of Lamb waves propagating in piezoelectric Bi12GeO20 crystal sheet has been investigated.
Formulas describing the influence of non-homogeneous mechanical pressure on propagation of bulk acoustic waves in crystals have derived. Phase velocity dependence for small amplitude waves in Bi12SiO20 crystal subjected the action of non-homogeneous pressure has been investigated. Under those conditions the behavior of the wave front has researched. Numerical calculation of phase velocity of waves...
Main theory results concerned with bulk elastic wave reflection/refraction on the boundary between two piezoelectric crystals subjected to the action of bias electric field or mechanical stress have presented. Some calculations for LiNbO3 and Bi12GeO20 crystals have made.
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