中文摘要：

分析了复合材料夹杂双层粘弹性阻尼材料组成的对称夹层板的线性弯曲,其中夹杂的粘弹性阻尼材料作为各向同性材料处理。既考虑面内应变能又考虑横向切应力应变能,用Ritz法研究各应力分量的应变能。以四边夹紧为边界条件的方板为例,计算并分析了复合材料层和粘弹性层的应变能以及复合结构的损耗因子。结果表明：复合材料层中的面内应变能占主要地位;粘弹性层中的xz方向和yz方向的切应力应变能较大;芯层的应变能很小。

英文摘要：

The linear bending of symmetric laminates with two interleaved viscoelastic damping layers is analyzed.The viscoelastic layer is treated as the isotropic material.The strain energy stored in in-plane as well as in transverse shear is considered.The Ritz method is employed to investigate the strain energy of individual stress components.Taking a square plate with four edges clamped as an example,the individual stress components and their strain energy for both composite materials and the viscoelastic layers are calculated,and the loss factor of the mixed structures is discussed.The results show that the total energy is mainly contributed by the in-plane strain energy in the panel layers of composites and the shear strain energy in xz and yz directions in the viscoelastic damping layers.The strain energy in the middle layer of composites is negligible.