| 基于频率响应的悬臂工字型钢梁的结构损伤分析 |
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| 引用本文： | 周奎,宁娜娜,林杰.基于频率响应的悬臂工字型钢梁的结构损伤分析[J].上海理工大学学报,2014,36(5):497-501. |
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| 作者姓名： | 周奎 宁娜娜 林杰 |
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| 作者单位： | 上海理工大学 环境与建筑学院,上海,200093 |
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| 基金项目： | 国家自然科学基金资助项目(51208300) |
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| 摘 要： | 基于结构动力学的基本理论,分析了悬臂工字型钢梁的振动模态特性,推导出结构损伤因子与损伤位置和损伤程度的函数关系.根据结构频率响应,运用频率平方变化比的方法进行结构损伤的初步检测与评估.应用ANSYS有限元分析软件对一悬臂工字型钢梁在11种工况下进行模拟计算,采用单元刚度折减来模拟结构损伤,并对工字型钢梁进行模型实验.
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| 关 键 词： | 结构损伤 频率响应 悬臂工字型钢梁 有限元分析 损伤检测 |
| 收稿时间： | 2013/12/16 0:00:00 |
Structural Damage Analysis of Cantilever H Steel Beam Based on Frequency Response |
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| ZHOU Kui,NING Na-na and LIN Jie.Structural Damage Analysis of Cantilever H Steel Beam Based on Frequency Response[J].Journal of University of Shanghai For Science and Technology,2014,36(5):497-501. |
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| Authors: | ZHOU Kui NING Na-na and LIN Jie |
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| Institution: | School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China;School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China;School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China |
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| Abstract: | The vibration properties of cantilever H steel beam were investigated based on the basic theory of structural dynamics.Structural damage factor was derived as a function of damage location and damage degree.According to the structural frequency response,the frequency square change ratio method was used in preliminary testing and evaluation of structural damage.Finite element analysis software ANSYS was applied to simulate and analyse a cantilever H steel beam under 11 working conditions.In the similation,the element stiffness reduction was adopted to simulate structural damage.Then model tests for the H steel beam were carried out.The calculation and analysis results are of great significance to the damage detection and recognition of cantilever H steel beam structures. |
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| Keywords: | structural damage frequency response cantilever H steel beam finite element analysis damage detection |
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