首页> 外文期刊>Journal of the Aeronautical Society of India >FREE VIBRATION BEHAVIOURS OF THICK LAMINATED NON-CIRCULAR CYLINDRICAL SHELLS
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FREE VIBRATION BEHAVIOURS OF THICK LAMINATED NON-CIRCULAR CYLINDRICAL SHELLS

机译:厚层非圆圆柱壳的自由振动行为

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In this paper the free vibration behaviours of thick laminated composite non-circular cylindrical shells are investigated using higher-order theory. The formulation accounts for the variation of the in-plane and transverse displacements through the thickness, abrupt discontinuity in slope of the in-plane displacements at the interfaces, and includes in-plane, rotary inertia terms, and also the inertia contributions due to the coupling between the different order displacement terms. The strain-displacement relations are accurately accounted for in the formulation without neglecting/approximating the (1 +z/R) terms. The solutions are obtained employing finite element procedure. Detailed study is made to highlight the influences of length and thickness ratios, eccentricity parameter, ply-angles and number of layers on the free vibration characteristics of non-circular shells.
机译:本文利用高阶理论研究了厚层状复合非圆形圆柱壳的自由振动行为。该公式考虑了沿厚度方向的平面位移和横向位移的变化,界面处平面位移的斜率的突然不连续性,并且包括平面惯性,旋转惯性项以及由于惯性引起的惯性贡献。不同阶位移项之间的耦合。在不忽略/逼近(1 + z / R)项的情况下,可以精确地计算出应变-位移关系。使用有限元程序获得解。进行了详细的研究,以突出长度和厚度比,偏心率参数,层角和层数对非圆形壳体自由振动特性的影响。

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