| 一种两阶段结构损伤识别方法研究 |
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| 引用本文： | 肖辉,常军. 一种两阶段结构损伤识别方法研究[J]. 苏州科技学院学报(工程技术版), 2011, 24(3): 23-27 |
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| 作者姓名： | 肖辉 常军 |
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| 作者单位： | 1. 苏州建设集团,江苏苏州,215000
2. 苏州科技学院土木工程学院,江苏苏州,215011 |
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| 基金项目： | 建设部研究开发资助项目 |
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| 摘 要： | 采用曲率模态结合模态应变能对结构的损伤位置和损伤程度进行了识别研究。首先采用改进的曲率模态识别出结构损伤的大体位置,然后采用模态应变能方法对损伤位置的单元进行损伤程度识别。在损伤程度识别时考虑了功能强大的BP神经网络方法。最后,为了验证该方法的有效性,采用了一数值模拟案例进行分析。数值模拟结果表明:曲率模态能够有效地识别出结构的损伤位置,模态应变能能够有效地识别出单元的损伤程度。
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| 关 键 词： | 损伤识别 曲率模态 模态应变能 简支梁 BP神经网络 |
A Study on Structural Damage Identification by a Two-stage Method |
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| XIAO Hui,CHANG Jun. A Study on Structural Damage Identification by a Two-stage Method[J]. Journal of University of Science and Technology of Suzhou:Engineering and Technology, 2011, 24(3): 23-27 |
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| Authors: | XIAO Hui CHANG Jun |
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| Affiliation: | XIAO Hui1,CHANG Jun2(1.Suzhou Construction Group,Suzhou 215000,China,2.School of Civil Engineering,SUTS,Suzhou 215011,China) |
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| Abstract: | The paper studies the identification of the structural damage location curvature mode with the modal strain energy. First, the curvature mode is used to structural damage, and then, the modal strain energy method is used to identify and extent identify by combining the general location of the damage extent of damage elements. During the damage extent identification by the modal strain energy, the BP neural network is used. Finally, a numerical simulation of a simply supported beam is used to evaluate the efficiency of the method. The results show that the curvature mode can effectively identify the structural damage location, and the modal strain energy can effectively figure out the damage extent of the damage elements. |
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| Keywords: | damage detection curvature model modal strain energy simply supported beam BP neural network |
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