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首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >Dynamic stability analysis of composite laminated cylindrical shells via the mesh-free kp-Ritz method
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Dynamic stability analysis of composite laminated cylindrical shells via the mesh-free kp-Ritz method

机译:无网格kp-Ritz法分析复合材料叠层圆柱壳的动力稳定性

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摘要

In this paper, a novel numerical technique is developed for the dynamic stability analysis of composite laminated cylindrical shells under static and periodic axial forces. The mesh-free kernel particle (kp) estimate is employed in hybridized form with harmonic functions, to approximate the 2-D transverse displacement field. A system of Mathieu-Hill equations is obtained through the application of the Ritz minimization procedure to the energy expressions. The principal instability regions are then analyzed via Bolotin's first approximation. The mesh-free kp-Ritz method is validated through comparison with existing available numerical data taken from open literature. Effects of boundary conditions and lamination schemes on the instability regions are also examined in detail.
机译:本文提出了一种新的数值技术,用于复合材料层合圆柱壳在静态和周期性轴向力作用下的动力稳定性分析。无网格核粒子(kp)估计以具有谐波函数的混合形式使用,以近似二维横向位移场。通过将Ritz最小化过程应用于能量表达式,可以获得Mathieu-Hill方程组。然后通过Bolotin的一阶近似分析主要不稳定区域。通过与开放文献中现有的可用数值数据进行比较,验证了无网格kp-Ritz方法的有效性。还详细研究了边界条件和层压方案对不稳定性区域的影响。

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