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Dynamics properties of composite sandwich open circular cylindrical shells

机译：复合材料三明治开孔圆柱壳的动力学特性

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This paper deals with the dynamic properties of three-layered composite sandwich open circular cylindrical shells (CSOCCS). First, the equations of motion that govern the free vibrations of CSOCCS are derived by applying Hamilton's principle based on the first-order shear deformation shell theory. Owing to considering the effect of rotary inertias and shear deformation, thin-to-moderately thick shells can be analyzed. Next, these equations are solved by means of the closed-form Navier method. The calculated results are compared with the findings of previous studies and those obtained by the finite element method, and a good agreement is observed. The variation of modal loss factor and frequency with system parameters is evaluated and presented graphically. It is the first time to study the dynamic properties of composite open circular cylindrical shells with constrained viscoelastic core.
机译：本文研究了三层复合夹心空心圆柱壳（CSOCCS）的动力学特性。首先，基于汉密尔顿原理，基于一阶剪切变形壳理论，推导了控制CSOCCS自由振动的运动方程。考虑到旋转惯性和剪切变形的影响，可以分析薄至中厚的壳。接下来，通过封闭形式的Navier方法求解这些方程。将计算结果与以前的研究结果以及通过有限元方法获得的结果进行比较，观察到了很好的一致性。评估模态损耗因子和频率随系统参数的变化，并以图形方式显示。这是首次研究具有粘弹性约束的复合开孔圆柱壳的动力学特性。

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