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| 基于模态柔度差曲率的梁结构损伤识别 | |
| 引用本文： | 李胡生,宋子收,周奎,刘潇轶. 基于模态柔度差曲率的梁结构损伤识别[J]. 江南大学学报(自然科学版), 2010, 9(1): 75-80 |
| 作者姓名： | 李胡生 宋子收 周奎 刘潇轶 |
| 作者单位： | 1. 上海应用技术学院,土木建筑与安全工程学院,上海,200235 2. 上海理工大学,环境与建筑学院,上海,200093 3. 上海应用技术学院,土木建筑与安全工程学院,上海,200235;上海理工大学,环境与建筑学院,上海,200093 |
| 基金项目： | 上海市科委重点科技攻关项目(072105115) |
| 摘 要： | 对于梁式结构的损伤识别，模态柔度比结构的频率和位移模态更加灵敏，通过结构的前几阶模态就可以容易计算得到。文中提出了基于柔度差曲率的损伤识别方法，通过3种方式计算所提指标，将得到的指标进行损伤敏感性对比，在简支梁设置一处、多处和支座处的损伤工况，在两跨连续梁设置多个和支座处的损伤，仿真结果表明，通过模态柔度行均值计算的柔度差曲率最好，柔度列最大元素计算的指标次之，柔度对角元素计算的指标可以进行简支梁1处损伤，但对多处损伤有些模糊。 |
| 关 键 词： | 模态柔度 柔度差曲率 行均值 |
Damage Identification of Beam-Type Structure Based on Modal Flexibility-Difference and Curvature |
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| LI Hu-sheng,SONG Zi-shou,ZHOU Kui,LIU Xiao-yi. Damage Identification of Beam-Type Structure Based on Modal Flexibility-Difference and Curvature[J]. Journal of Southern Yangtze University:Natural Science Edition, 2010, 9(1): 75-80 | |
| Authors: | LI Hu-sheng SONG Zi-shou ZHOU Kui LIU Xiao-yi |
| Affiliation: | 1.School of Construction and Security Engineering;Shanghai Institute of Technology;Shanghai 200235;China;2.School of Environment and Architecture;University of Shanghai for Science and Technology;Shanghai 200093;China |
| Abstract: | For damage identification of the beam-type structure,modal Flexibility is more sensitive than the modal frequencies and displacement.By the first few order,the modes can be easily calculated.In this paper,based on the difference between flexibilities,curvature of damage identification method is proposed,referred to three ways of calculating the indicator.Sensitive indicators of injury will be contrasted to each one.The simple beam is set in one place,and support with the damage conditions,two-span continuou... |
| Keywords: | modal flexibility flexibility-difference and curvature line mean |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |