A pair of dual integral equations,which describe the mixed boundary-value problem for dynamic interaction between a half-space with transversely isotropic saturated soil and elastic thick circular plate,is established based on the general solutions of Biot s motion equations for transversely isotropic saturated poroelastic media.

According to the basic idea of classical Yin-Yang complementarity and modern dual-complementarity,in a new,simple and unified way proposed by Luo,the simplified Gurtin-type variational principles for elastodynamics of piezoelectric thick plate can be established systematically.