复合材料夹层壳振动分析的高阶剪切变形理论

详细信息

HIGHER ORDER DEFORMATION THEORY FOR DYNAMIC ANALYSIS OF COMPOSITE SANDWICH SHELLS

摘要

摘要: 本文提出了计及复合材料面板横向剪切变形的夹层壳高阶位移模式,该模式满足夹层壳上、下表面剪应力为零的条件,并以此推导出夹层壳自由振动的有限元方程,讨论了夹层壳的夹芯及面板的阻尼特性,给出阻尼矩阵的形成方式,将数值计算与实验结果进行了对比,最后给出了阻尼比Ψ随夹芯厚度h_c、剪切模量G和阻尼损耗因子β的变化曲线.
- 复合材料 /
- 夹层壳 /
- 剪切变形 /
- 位移模式 /
- 动态特性
Abstract: A higher order displacement mode is presented for sandwich shells including shear deformation in composite face layers.The mode satisfies the condition that the transverse shear stresses vanish on the sandwich shell top and bottom surfaces.From this mode the finite element equations are derived for free vibration of sandwich shells.The damping characteristics of the core and face layers are discussed.And the formula of damping matrix is given.The comparisons between numerical computed values and experimental data are carried on.Finally,the curves which the damping ratio Ψ varies with the core thickness h_c,shear modulus G and damping loss factor β,are shown graphically.
- Composites /
- sandwich shells /
- shear deformation /
- displacement mode /
- dynamic characterstics