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首页> 外文期刊>Journal of aerospace engineering >Large-Amplitude Vibration Analysis of 3D Braided Composite Cylindrical Shells in an Elastic Medium
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Large-Amplitude Vibration Analysis of 3D Braided Composite Cylindrical Shells in an Elastic Medium

机译：弹性介质中3D编织复合圆柱壳的大振幅振动分析

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摘要

Large-amplitude vibration analysis for a three-dimensional (3D) braided composite cylindrical shell of finite length subjected to static or periodic axial forces has been presented. Based on a new micro-macro-mechanical model, a 3D braided composite may be treated as a cell system, which has been introduced as a representative cell of a 3D braided composite and its components, and the geometry of each cell is deeply dependent on its position in the cross section of the cylindrical shell. The shell is embedded in an elastic medium, which is modeled as a Pasternak elastic foundation. The motion equations are based on a higher-order shear deformation shell theory with a von Karmn-Donnell-type of kinematic nonlinearity. A two-step perturbation technique is used to determine the linear and nonlinear frequency and parametric resonances of the 3D braided cylindrical shells. The numerical illustrations concern the nonlinear vibration behavior of braided composite cylindrical shells with different values of initial stress, of geometric parameter, and of fiber volume fraction. (C) 2015 American Society of Civil Engineers.
机译：已经提出了有限长度的三维（3D）编织复合圆柱壳在静态或周期性轴向力作用下的大振幅振动分析。基于新的微宏力学模型，可以将3D编织复合材料视为一个单元系统，该系统已作为3D编织复合材料及其组件的代表单元引入，每个单元的几何形状都深深取决于它在圆柱壳横截面中的位置。壳体嵌入弹性介质中，该介质建模为Pasternak弹性地基。运动方程是基于高阶剪切变形壳理论和运动非线性的von Karmn-Donnell型的。使用两步扰动技术来确定3D编织圆柱壳的线性和非线性频率以及参数共振。数值说明涉及具有不同初始应力值，几何参数和纤维体积分数的编织复合圆柱壳的非线性振动行为。 （C）2015年美国土木工程师学会。

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