| 柔度曲率法对梁结构的损伤诊断 |
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| 引用本文： | 李永梅, 周锡元, 高向宇, 耿麟, 赵胥英. 柔度曲率法对梁结构的损伤诊断[J]. 北京工业大学学报, 2008, 34(11): 1173-1178. |
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| 作者姓名： | 李永梅 周锡元 高向宇 耿麟 赵胥英 |
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| 作者单位： | 北京工业大学,建筑工程学院,北京,100022;北京工业大学,城市与工程安全减灾省部共建教育部重点实验室,北京,100022;北京工业大学,建筑工程学院,北京,100022 |
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| 基金项目： | 北京市自然科学基金，中国博士后科学基金 |
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| 摘 要： | 针对各种支承形式梁结构的损伤诊断,采用结构柔度矩阵最大列元素的柔度曲率(MFC)对悬臂梁进行损伤定位,采用损伤结构柔度矩阵主对角元素的柔度曲率(DFC)对非悬臂梁进行损伤定位,算例表明,针对不同形式的梁构造不同柔度曲率指标,仅用损伤结构少数低阶的模态参数,就可以对非悬臂和悬臂梁结构进行损伤定位识别,本文方法求得的柔度曲率曲线既能识别单个损伤的存在,也能识别多个损伤的位置,并能定性地反映损伤程度。
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| 关 键 词： | 结构 损伤诊断 柔度 曲率 模态参数 |
| 收稿时间： | 2007-10-18 |
Damage Diagnosis of Beam Structures by Flexibility Curvature Method |
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| LI Yong-mei, ZHOU Xi-yuan, GAO Xiang-yu, GENG Lin, ZHAO Xu-ying. Damage Diagnosis of Beam Structures by Flexibility Curvature Method[J]. Journal of Beijing University of Technology, 2008, 34(11): 1173-1178. |
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| Authors: | LI Yong-mei ZHOU Xi-yuan GAO Xiang-yu GENG Lin ZHAO Xu-ying |
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| Abstract: | To locate structural damages for differently supported beams,one method of flexibility curvature M_(FC) was constructed by the maximum in each column of flexibility matrix for cantilever beams.The other method of flexibility curvature D_(FC) was constructed from principal diagonal elements of flexibility matrix as a new indicator for non-cantilever beams.The numerical simulation sups indicate that the damage location in structures can be identified without baseline modal parameters by D_(FC) for non-cantilever beams and M_(FC) for cantilever beams,by which not only simple damage but also multiple ones can be detected and degree of structural damage can also be derived by using only a few of the lower frequency modes. |
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| Keywords: | structure damage diagnosis flexibility curvature modal parameter |
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