| 摘 要： | According to the extensive theory of flexural vibration of elastic-viscoelastic composite platesystem in a previous paper,the vibration and scattering sound near field of an immersed rectangularelastic-viscoelastic composite plate in an underwater sound are studied.The solution for deflectionof the composite plate is expanded into a series in terms of normal mode,whatever plate is vibratingin water under the influence of incident sound wave.The interaction between normal modes owingto sound field coupling is taken into consideration.As a function of(kl_1,r;m,n;p,q),the couplingcoefficients between(m,n);(p,q)modes of vibration are calculated numerically.Whith these coef-ficients,the vibration of composite plate and the sound irradiation from which may be characterized(where k is wave number,l_1,is length of one parallel edges,r=1_2/l_1 is parametric variable,l_2 is lengthof another parallel edges).And then,the complex values of amplitude of normal modes for flexuralmotion of a Steel-Rubber bilaminar plate
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