| 一种环境激励下基于应变测试的结构损伤指标 |
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| 引用本文： | 彭细荣,路新瀛,隋允康,陈肇元.一种环境激励下基于应变测试的结构损伤指标[J].北京工业大学学报,2008,34(5):449-453. |
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| 作者姓名： | 彭细荣 路新瀛 隋允康 陈肇元 |
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| 作者单位： | 哈尔滨工业大学深圳研究生院,深圳,518055;清华大学深圳研究生院,深圳,518055;北京工业大学工程数值模拟中心,北京,100022 |
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| 基金项目： | 国家自然科学基金，教育部高等学校博士学科点专项科研基金 |
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| 摘 要： | 在线结构监测的损伤识别指标须对结构局部损伤敏感且计算量小以适合在线数据处理的需求.应用自然激励技术及数理统计理论,建立了基于环境激励下结构应变测试数据的损伤指标。算例比较表明,基于应变测试数据建立的损伤指标比基于位移及模态频率的指标对结构局部损伤更为敏感,依据应变测试数据的损伤指标可以很好地检测损伤的发生并大致确定损伤发生的位置.
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| 关 键 词： | 环境激励 损伤指标 脉冲响应 应变测试 |
| 文章编号： | 0254-0037(2008)05-0449-05 |
| 修稿时间： | 2007年3月27日 |
A Damage Index Based on Strain Measurement for Structures Under Environmental Excitation |
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| PENG Xi-rong,LU Xin-ying,SUI Yun-kang,CHEN Zhao-yuan.A Damage Index Based on Strain Measurement for Structures Under Environmental Excitation[J].Journal of Beijing Polytechnic University,2008,34(5):449-453. |
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| Authors: | PENG Xi-rong LU Xin-ying SUI Yun-kang CHEN Zhao-yuan |
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| Abstract: | A damage identification index should be sensitive to the local structural damage and its computational response should cater for the requirement of on-line structural monitoring system.By adopting natural excitation technique and mathematical statistics theory,a damage index is established,which is based on the strain measurement of structures under environmental excitation.Numerical simulation is carried out, it reveals that the damage index based on strain is more sensitive than that based on displacement or natural frequencies.The damage index can detect the occurrence and find out the approximate location of structural damages. |
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| Keywords: | environmental excitation damage index pulse response strain measurement |
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