...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Mechanical systems and signal processing >Dynamic Condition Assessment Of A Cracked Beam With Thecomposite Element Model
【24h】

Dynamic Condition Assessment Of A Cracked Beam With Thecomposite Element Model

机译：组合梁模型评估裂化梁的动力状态

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 models of local damage in a beam element are usually formulated as a damage in a single element, and the coupling effect between adjacent damages is simply ignored. This coupling effect is larger in the case of a fine mesh of finite elements or when there is a high density of damage in the structure. This paper studies such effect from multiple cracks in a finite element in the dynamic analysis and local damage identification. The finite beam element is formulated using the composite element method [P. Zeng, Composite element method for vibration analysis of structure, Journal of Sound and Vibration 218 (1998) 619-696] with a one-member-one-element configuration with cracks where the interaction effect between cracks in the same element is automatically included. The accuracy and convergence speed of the proposed model in computation are compared with existing models and experimental results. The parameter of the Christides and Barr [One dimensional theory of cracked Bernoulli-Euler beams, International Journal of Mechanical Science 26 (1984) 639-648] crack model is found needing adjustment with the use of the proposed model. The response sensitivity-based approach of damage identification is then applied in the identification of single and multiple crack damages with both simulated and experimental data. Results obtained are found very accurate even under noisy environment.
机译：通常将梁单元中局部损坏的现有模型公式化为单个单元中的损坏，而相邻损坏之间的耦合效应将被忽略。在有限元细网格的情况下或当结构中损坏的密度很高时，这种耦合效果会更大。本文在动力分析和局部损伤识别中研究了有限元中多个裂纹的这种影响。有限元单元是用复合单元法[P． Zeng，《用于结构振动分析的复合元件方法》，《声音与振动学报》 218（1998）619-696]，带有一个带有裂纹的单成员一元件配置，其中自动包含了同一元件中裂纹之间的相互作用。将所提模型的计算精度和收敛速度与现有模型和实验结果进行了比较。 Christides和Barr的参数[开裂的Bernoulli-Euler梁的一维理论，国际机械科学杂志26（1984）639-648]被发现需要使用提出的模型进行调整。然后将基于响应灵敏度的损伤识别方法应用于通过模拟和实验数据识别单个和多个裂纹损伤。发现获得的结果即使在嘈杂的环境下也非常准确。

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