在弹性基础上的FG-GPL强化形外面板的大振幅振动
1Department of Naval Architecture and Ocean Engineering, Hongik University, Jochiwon, Sejong 30016, Republic of Korea.
Materials (Basel, Switzerland)
|September 9, 2023
概括
本研究探讨了在弹性基础上的石墨烯板块 (GPL) 增强复合体形板的非线性自由振动. 调查结果揭示了基础刚度,GPL分布和面板几何形状对振动特征的显著影响.
科学领域:
- 复合材料科学 复合材料科学
- 机械工程 机械工程
- 振动分析 振动分析
背景情况:
- 用石墨烯血小板 (GPL) 增强的功能分级 (FG) 复合结构为高级应用提供了卓越的性能.
- 现有的研究主要集中在梁,板和圆柱体面板上,通常使用数字方法,如DQM和FEM.
- 研究FG-GPL增强复合材料 (RC) 圆面板,特别是它们的非线性振动,仍然是一个需要进一步探索的领域.
研究的目的:
- 在弹性基础上研究FG-GPL增强复合形板的非线性自由振动.
- 开发和验证一种新的2D平面网状无方法来分析这些复杂的结构.
- 分析各种参数对这些先进复合板的振动行为的影响.
主要方法:
- 为非线性自由振动分析开发了一种2D平面网状无方法.
- 采用了第一阶剪变形外理论和-卡尔曼非线性.
- 形中性表面被转化为2D矩形平面,并使用MITC3+外元素来减轻剪切膜锁定. 一个三步直接代方案解决了非线性模态方程.
主要成果:
- 在基准比较中,开发的无网格方法与微分方程方法 (DQM) 显示出良好的一致性.
- 非线性自由振动特性受到弹性基础刚度的显著影响.
- GPL的数量和分散模式,面板几何形状和边界条件极大地影响振动行为.
结论:
- 2D平面网状无法为分析FG-GPLRC圆面板的非线性自由振动提供了可靠的方法.
- 弹性基础,GPL特性,面板几何形状和边界条件是控制动态响应的关键因素.
- 这项研究为设计具有定制振动性能的先进复合体形面板结构提供了宝贵的见解.
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