Analysis and optimization for vibration of laminated rectangular plates with blended layers
Analysis and optimization for vibration of laminated rectangular plates with blended layers
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DOI：
10.1016/j.compstruct.2021.114400
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发表时间：
2021-07
影响因子：
6.3
通讯作者：
M. Innami;S. Honda;K. Sasaki;Y. Narita
中科院分区：
文献类型：
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作者：
M. Innami;S. Honda;K. Sasaki;Y. Narita
提出了一种精确、直观的分析含混层复合材料层合矩形板自由振动的方法。本文将混杂层板定义为层合板，其中某些外层由具有不同取向角度的直纤维的多个分区组成。并编制了有限元程序，验证了该方法的准确性。数值比较表明，对于具有两个、三个、四个和五个分区的矩形板，用本方法计算的固有频率与有限元程序计算的结果吻合较好。随后，这种分析方法的使用在振动优化中进行了测试，即基频最大化的设计。这种频率优化是通过同时改变多个分区中的纤维取向角来实现的，在简单情况下使用置换，在大量的频率计算中通过遗传算法(GA)来实现。结果表明，引入混合层是设计复合材料层合板动力特性的一种非常有效的方法。
An accurate and straightforward analytical method is proposed for the free vibration of a laminated composite rectangular plate with blended layers. The plate with blended layers is defined here as a laminated plate where some of the outer layers are composed of multiple subareas with different orientation angles of straight fibers. A finite element code is developed as well to verify accuracy of the proposed method. In numerical comparison, the natural frequencies calculated by the present method agree well with those from the FEM code for rectangular plates with two, three, four and five subareas. Subsequently, the use of this analytical method is tested in vibration optimization, i.e. design for maximization of fundamental frequencies. This frequency optimization is formulated by changing the fiber orientation angles in multiple subareas simultaneously, and is carried out by using permutation in simple cases and by Genetic Algorithm (GA) for a larger number of frequency calculations. It is observed that introduction of blended layers is very effective approach to design the dynamic characteristics of laminated composite plates.