基于应变时程数据的损伤识别方法

刘蜜; 徐赵东

doi:10.13204/j.gyjz201003013

基于应变时程数据的损伤识别方法

doi: 10.13204/j.gyjz201003013

刘蜜,
徐赵东

1.
东南大学混凝土及预应力混凝土教育部重点实验室,南京210096

基金项目:

国家支撑计划资助项目(2006BAJ03B05);江苏省六大人才高峰资助项目

详细信息

作者简介:
刘蜜,女,1984年出生,硕士,现任新加坡国立大学researchengineer. E－mail:zhdxu@yahoo.com.cn(徐赵东)

刘蜜,女,1984年出生,硕士,现任新加坡国立大学researchengineer. E－mail:zhdxu@yahoo.com.cn(徐赵东)

中图分类号: TU312.3
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- 被引次数: 0
出版历程
- 收稿日期: 2009-06-23
- 刊出日期: 2010-03-20

A DAMAGE IDENTIFICATION METHOD BASED ON THE TIME-HISTORY DATA OF STRAIN

Liu Mi,
Xu Zhaodong

1.
RC&PC Key Laboratory of Education Ministry,Southeast University,Nanjing 210096,China

摘要

摘要: 通过分析传统的应变模态方法,并在此基础上采用应变模态曲率差指标对一悬臂梁进行了损伤识别,发现该方法受到振型求解以及激励力的影响,识别效果不理想。所以对基于应变能量的损伤识别指标开展研究,发现该指标能够在不受激励力的影响下,避开复杂的振型求解,并通过提出的放大系数k对识别结果进行后处理,较好地提高了损伤识别效果。
- 损伤识别 /
- 应变模态曲率差 /
- 应变能量差 /
- 应变能量曲率差
Abstract: Based on the method of the time-history data of strain,the damage identification of a cantilever beam is studied in this paper. By using the method of strain mode curvature difference,this index is affected by vibration mode and exciting force and cant satisfy the request of damage identification. By using the energy method based on strain which is identified to avoid the effect of vibration mode and exciting force,the effect of the damage identification has been greatly improved,especially after amplifying processing with a magnification factors k which is proposed in this paper.
- damage identification /
- strain mode curvature difference /
- strain energy difference /
- strain energy-curvature difference

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参考文献(7)

[2] 李德葆,陆秋海.试验模态分析及其应用[M].北京:科学出版社,2001.

Doebling SW,Farrar CR,Prime MB,et al. Damage Identification and Health Monitoring of Structural and Mechanical Systems from Changes in Their Vibration Characteristics: ALiterature Review[M].Los Alamos National Laboratory Report,LA-13070-MS,1996.

[3] Pandy AK,Biswas M,Samman MM.Damage Detection from Changes in Curvature Mode Shapes[J]. Journal of Sound and Vibration,1991,145(2):321-332.

[4] 李德葆,陆秋海,秦权.承弯结构的曲率模态分析[J].清华大学学报,2002,42(2):224-227.

[5] 李忠献,齐怀展,朱劲松.基于模态曲率法的大跨度斜拉桥损伤识别[J].地震工程与工程振动,2007,27(4):122－126.

[6] Zhao-Dong Xu,Zhishen Wu. Energy Damage Detection StrategyBased on Aacceleration Responses for Long-Span Bridge Structures[J]. Engineering Structures,2007,29:609-617.

[7] Zhao-Dong Xu. Energy Damage Detection Strategy Based on Strain Responses for Long-Span Bridge Structures[J]. Journal ofIntelligent Materials Systems and Structures (submitted paper).

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