| 基于模态分析的钢结构损伤识别方法研究 |
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| 引用本文： | 许金余,张其顶,宋洪斌,于萍.基于模态分析的钢结构损伤识别方法研究[J].机械科学与技术(西安),2007,26(2):206-208. |
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| 作者姓名： | 许金余 张其顶 宋洪斌 于萍 |
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| 作者单位： | [1]西北工业大学力学与土木建筑学院,西安710072 [2]空军工程大学工程学院,西安710038 |
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| 摘 要： | 对钢结构损伤的准确识别是确保钢结构安全可靠的重要保证。本文提出了一种利用动力试验检测钢结构破损的方法。通过建立钢梁的有限元模型计算正常情况下梁的动力特性,利用现场采集试验数据、模态分析技术获得损坏梁的自振特性。将无损模型分段计算出自振特性,利用特征比的比较确定损伤位置。经实例分析证明该方法准确、简便、适用,提高了钢结构损伤识别的效率和精度。
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| 关 键 词： | 钢结构损伤识别 模态分析 特征比 |
| 文章编号： | 1003-8728（2007）02-0206-03 |
| 修稿时间： | 2006-03-17 |
Steel Structural Damage Detection Method Based on Modal Analysis |
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| Xu Jinyu,Zhang Qiding,Song Hongbin,Yu Ping.Steel Structural Damage Detection Method Based on Modal Analysis[J].Mechanical Science and Technology,2007,26(2):206-208. |
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| Authors: | Xu Jinyu Zhang Qiding Song Hongbin Yu Ping |
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| Abstract: | The accurate detection of steel structural damage guarantees to an important degree the safety and reliability of a steel structure. The paper proposed a method for detecting steel structural damage using power experiments. It calculated the dynamic characteristics of a steel beam without damage through establishing its finite element model and obtained the vibration characteristics of a damaged steel beam using on-the-spot experimental data and modal analysis technology. Then it calculated the vibration characteristics of section by section of the damagefree steel beam and determined its damage position by comparing characteristics ratios. The instance analysis indicates that the method is accurate, simple and applicable and enhances the efficiency and accuracy of steel structural damage detection. |
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| Keywords: | steel structural damage detection modal analysis characteristics ratio |
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