<正>The propagation of the transverse surface waves in an unbounded piezoelectric half-space with a viscous liq...
Feng JIN~1,Peng LI~1,Zheng-hua QIAN~2 1 MOE Key Laboratory for Strength and Vibration,School of Aerospace,Xi''an Jiaotong University Xi''an,Shaanxi 710049,P.R.China 2 Department of Mechanical and Environmental Informatics,Tokyo Institute of Technology Tokyo 152-8550,Japan
This work presents a theoretical study of the propagation behavior of Bleustein-Gulyaev waves in a layered structure consisting of a functionally graded piezoelectric material(FGPM) layer and a transversely isotropic piezoelectric substrate. The influence of the graded variation of FGPM coefficients on the dispersion relations of Bleustein-Gulyaev waves in the layered structure is investigated. It is demonstrated that,for a certain frequency range of Bleustein-Gulyaev waves,the mechanical perturbations of the particles are restricted in the FPGM layer and the phase velocity is independent of the electrical boundary conditions at the free surface. Results presented in this study can not only provide further insight on the electromechanical coupling behavior of surface waves in FGPM layered structures,but also lend a theoretical basis for the design of high-performance surface acoustic wave(SAW) devices.
