Vibration and damping analysis of cylindrical sandwich panels containing a viscoelastic flexible core
Vibration and damping analysis of cylindrical sandwich panels containing a viscoelastic flexible core
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DOI：
10.1177/1099636210382313
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发表时间：
2011-05-01
影响因子：
3.9
通讯作者：
Shakeri, Mahmood
中科院分区：
文献类型：
--
作者：
Afshin, Mehdi;Sadighi, Mojtaba;Shakeri, Mahmood
基于夹层结构高阶理论，研究了含粘弹性柔性芯层的圆柱夹层板的振动和阻尼特性。一个分层制定研究高阶理论的适用性。面板被认为是复合材料层合板与交叉铺层铺设遵循一阶剪切变形假设和核心被认为是一个线性粘弹性介质与出平面应力。通过应用汉密尔顿原理推导出了场方程沿着和边界条件。对于简支边界条件，给出了一个封闭解，并与文献中的结果进行了比较，验证了高阶解和分层解的结果。最后，研究了芯层刚度、芯层与面板厚度比、芯层阻尼等参数对高阶理论适用性的影响，以及夹层板固有频率和模态损耗因子的变化规律。结果表明，高阶和分层理论之间的小芯刚度，并为一个广泛的范围内的核心面板厚度比和核心阻尼。
In the present study, vibration and damping analysis of cylindrical sandwich panels containing a viscoelastic flexible core based on the high-order theory of sandwich structures is investigated. A layerwise formulation is developed to study the applicability of the high-order theory. The face sheets are considered as composite laminates with cross-ply layup that follow first-order shear deformation assumption and the core is considered as a linear viscoelastic medium with out-of-plane stresses only. The field equations along with the boundary conditions are derived via the application of Hamilton's principle. A closed-form solution is developed for simply supported boundary conditions and a comparison is made with available results in the literature to verify the high-order and layerwise solution results. Finally, the influence of parameters including the core stiffness, the core to the face sheets thickness ratio, and the core damping on the applicability of the high-order theory, and variation of natural frequencies and modal loss factors of the sandwich panel are investigated. The results demonstrate a good agreement between the high-order and layerwise theories for small core stiffnesses, and for a wide range of the core to the face sheet thickness ratio and core damping.