Vibration analysis and optimization of sandwich composite with curvilinear fibers
Vibration analysis and optimization of sandwich composite with curvilinear fibers
复制标题
曲线纤维夹层复合材料的振动分析与优化
DOI：
10.1088/1742-6596/744/1/012020
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Yoshihiro Narita
中科院分区：
文献类型：
--
作者：
Shinya Honda;Yoshihiro Narita
本文提出了一种基于精化锯齿理论（RZT）的壳单元，并将其应用于CFRP蒙皮-软芯复合材料夹层板的振动分析和优化问题。RZT接受层刚度的巨大差异，并且比逐层或三维理论需要更少的计算工作。数值结果表明，该方法能准确地预测含软芯复合材料夹层板的振动特性。然后，优化CFRP复合材料蒙皮中增强纤维的形状，以最大化基频。作为一个优化器，粒子群优化（PSO）的方法，因为曲线纤维形状定义的连续设计变量。结果表明，与直纤维相比，具有最佳曲线纤维形状的复合材料夹层具有更高的基频。
The present paper develops a shell element based on the refined zigzag theory (RZT) and applies it to the vibration analysis and optimization problem of the composite sandwich plate composed of CFRP skins and soft-cores. The RZT accepts large differences in layer stiffness, and requires less calculation effort than the layer-wise or three-dimensional theories. Numerical results revealed that the present method predicts vibration characteristics of composite sandwich plates with soft-core accurately. Then, shapes of reinforcing fibers in CFRP composite skins are optimized to maximize fundamental frequencies. As an optimizer, the particle swarm optimization (PSO) approach is employed since curvilinear fiber shapes are defined by continuous design variables. Obtained results showed that the composite sandwich with optimum curvilinear fiber shapes indicates higher fundamental frequencies compared with straight fibers.