• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Composite Structures >Predicting vibration characteristics of rotating composite blades containing CNT-reinforced composite laminae and damaged fiber-reinforced composite laminae
【24h】

Predicting vibration characteristics of rotating composite blades containing CNT-reinforced composite laminae and damaged fiber-reinforced composite laminae

机译：旋转复合叶片的振动特性，含有CNT加强复合薄层和损坏的纤维增强复合薄层

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Existing of cracks within blade structures can cause stiffness degradation and hence changes their vibration characteristics. This study investigates the vibration behaviors of rotating pre-twisted hybrid composite blades containing functionally graded carbon nanotube-reinforced composite (FG-CNTRC) laminae and damaged fiber-reinforced composite (FRC) laminae. The degraded stiffness of the cracked lamina is modeled through the self-consistent model (SCM). The blade is modeled as a shell structure that is formed by twisting a plate around its mean line. With the help of the differential geometry theory, a novel shell model has been derived to describe the kinetics of the blade. The effect of the Coriolis and centrifugal force are both presented in the formulation, which results in a damped-like free vibration system governed by a system of second-order ordinary differential equations (ODEs). Utilizing the state space technique, the system is reformulated to a system of first-order ODEs. The IMLS-Ritz method is then used for discretizing the ODEs. After carefully validating the effectiveness of the presented model through a series of comparison studies, parametric studies including CNT distribution configuration, rotating speed, geometrical parameters on the vibration responses of cross-plied composite blades are systematically examined. The vibration characteristics of angle-plied composite blades are also investigated.
机译：叶片结构内的裂缝存在可能导致刚度降解，因此改变它们的振动特性。本研究研究了旋转预扭曲的混合复合叶片的振动行为，其含有功能梯度碳纳米管增强复合物（FG-CNTRC）薄层和受损纤维增强复合材料（FRC）薄层的液体。裂化薄层的降解刚度通过自我致一致的模型（SCM）进行建模。刀片被建模为壳结构，该壳结构通过围绕其平均线扭转板而形成。在差分几何论的帮助下，已经得出了一种新颖的壳模型来描述刀片的动力学。 Coriolis和离心力的效果均呈现在制剂中，这导致由二阶常微分方程（ODES）的系统管辖的湿润的自由振动系统。利用状态空间技术，该系统将重新重新格式化到一阶码内系统。然后使用IML-RITZ方法来离散化杂散。通过一系列比较研究仔细验证所呈现的模型的有效性，系统地检查包括CNT分布配置，转速，旋转速度，交叉复合刀片的振动响应的几何参数的参数研究。还研究了角度覆盖复合刀片的振动特性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号