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首页> 外文会议>The 2001 ASME International Mechanical Engineering Congress and Exposition, 2001, Nov 11-16, 2001, New York, New York >FREE VIBRATIONS OF COMPOSITE SHALLOW CIRCULAR CYLINDRICAL SHELL PANELS WITH A BONDED CENTRAL STIFFENING SHELL STRIP
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FREE VIBRATIONS OF COMPOSITE SHALLOW CIRCULAR CYLINDRICAL SHELL PANELS WITH A BONDED CENTRAL STIFFENING SHELL STRIP

机译：中央加劲肋条结合的复合浅圆形圆柱壳面板的自由振动

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摘要

This study is concerned with the "Free Vibrations of Composite Shallow Circular Cylindrical Shells or Shell Panels with a Central Stiffening Shell Strip". The upper and lower shell elements of the stiffened composite system are considered as dissimilar, orthotropic shallow shells. The upper relatively narrow stiffening shell strip is centrally located and adhesively bonded to the lower main shell element. In the theoretical formulation, a "First Order Shear Deformation Shell Theory (FSDST)" is employed. The complete set of the shallow shell dynamic equations (including the stress resultant-displacement and the constitutive equations) and the equations of the thin flexible, adhesive layer are first reduced to a set of first order system of ordinary differential equations. This final set forms the governing equations of the problem. Then, they are integrated by means of the "Modified Transfer Matrix Method". In the adhesive layer, the "hard" and the "soft" adhesive effects are considered. It was found that the material characteristics of the adhesive layer influence the mode shapes and the corresponding natural frequencies of the composite shallow shell panel system. Additionally, some parametric studies on the natural frequencies are presented.
机译：这项研究与“复合浅圆形圆柱壳或带有中央加劲壳条的壳板的自由振动”有关。加劲复合系统的上壳和下壳元素被认为是不相似的正交异性浅壳。上部相对较窄的加劲壳条位于中间，并粘结在下部主壳上。在理论公式中，采用了“一阶剪切变形壳理论（FSDST）”。首先将完整的浅壳动力学方程组（包括应力合力位移和本构方程）和薄的柔性粘结层方程组简化为一组一阶常微分方程组。这最后一组构成了问题的控制方程。然后，通过“修改的传输矩阵方法”对它们进行集成。在粘合层中，考虑了“硬”和“软”粘合效果。发现粘合剂层的材料特性影响复合浅壳面板系统的模态形状和相应的固有频率。此外，还介绍了一些有关固有频率的参数研究。

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