| 实测模态和结构模型同步修正的结构损伤识别方法 |
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| 引用本文： | 张纯,宋固全,吴光宇.实测模态和结构模型同步修正的结构损伤识别方法[J].振动与冲击,2010,29(9):1-4. |
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| 作者姓名： | 张纯 宋固全 吴光宇 |
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| 作者单位： | 南昌大学建筑工程学院,南昌,330031 |
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| 基金项目： | 国家自然科学基金青年基金，江西省自然科学青年基金，江西省教育厅青年科学基金 |
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| 摘 要： | 在基于灵敏度分析的有限元模型修正方法基础上,提出一种对实测模态和结构模型同步修正的结构损伤识别方法。即利用有损结构模态与测量噪声在时频域内的差异,以结构有限元模型为基准,对实测模态差进行小波去噪处理,再利用修正后的模态构造目标函数,进行有限元模型修正,经过迭代计算最终可识别结构的损伤。数值算例表明该方法可有效降低噪声的影响,提高损伤识别的精度。
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| 关 键 词： | 模型修正 小波去噪 损伤识别 |
| 收稿时间： | 2009-6-5 |
| 修稿时间： | 2009-7-29 |
Structural damage identification by synchronally updating measured modes and finite element model |
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| ZHANG Chun,SONG Gu-quan,WU Guang-yu.Structural damage identification by synchronally updating measured modes and finite element model[J].Journal of Vibration and Shock,2010,29(9):1-4. |
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| Authors: | ZHANG Chun SONG Gu-quan WU Guang-yu |
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| Affiliation: | ZHANG Chun,SONG Gu-quan,WU Guang-yu(School of Civil Engineering and Architecture,Nanchang University,Nanchang 330031,China) |
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| Abstract: | A damage identification method by synchronally updating measured vibration modes and finite element model was developed based on the classic sensitivity-based model updating method.A wavelet de-noising treatment was proposed to reduce the noise in modal difference between measured model and analysis mode by the finite element model according to different time-frequency features between structural modal signal and noise.The de-noised modes were used to construct objective function and the optimal question wa... |
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| Keywords: | model updating wavelet denoising damage identification |
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