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| 基于分级遗传算法的结构损伤识别方法 | |
| 引用本文： | 程远胜,区达光,谭国焕,白植洲.基于分级遗传算法的结构损伤识别方法[J].华中科技大学学报(自然科学版),2002,30(8):73-75. |
| 作者姓名： | 程远胜 区达光 谭国焕 白植洲 |
| 作者单位： | 1. 华中科技大学,交通科学与工程学院 2. 香港大学,土木工程系 3. 同济大学,桥梁工程系 |
| 基金项目： | 教育部留学回国人员科研启动基金资助项目 |
| 摘 要： | 提出了一种基于遗传算法的利用不完整振动数据识别结构损伤的新方法，该方法首先扩展不完整的振型并利用单元能量熵差比确定结构损伤的大致位置，然后采用二级搜索策略，借助遗传算法确定结构损伤的程度，数值计算结果表明，当可能的损伤区域较大时，本方法较直接搜索策略更能有效地确定结构损伤的程度。 |
| 关 键 词： | 损伤识别 频率 遗传算法 振型 分级搜索策略 |
| 文章编号： | 1671-4512(2002)08-0073-03 |
| 修稿时间： | 2002年2月20日 |
Structural damage identification based on a genetic algorithm using two-level search strategy |
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| Cheng Yuansheng Au F. T. K Tham L. G Bai Zhizhou Assoc. Prof., College of Traffic Sci. & Eng.,Huazhong Univ of Sci. & Tech.,Wuhan ,China..Structural damage identification based on a genetic algorithm using two-level search strategy[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2002,30(8):73-75. | |
| Authors: | Cheng Yuansheng Au F T K Tham L G Bai Zhizhou Assoc Prof College of Traffic Sci & Eng Huazhong Univ of Sci & Tech Wuhan China |
| Institution: | Cheng Yuansheng Au F. T. K Tham L. G Bai Zhizhou Assoc. Prof., College of Traffic Sci. & Eng.,Huazhong Univ of Sci. & Tech.,Wuhan 430074,China. |
| Abstract: | This paper described a method for identifying structural damage based on a genetic algorithm using incomplete and noisy modal test data. The incomplete mode shape data were expanded to match with all degrees of freedom of the finite element model under consideration. The elemental energy quotient difference ratio was employed to locate the damage domain approximately. A genetic algorithm was used to quantify the damage extent by minimizing the errors between the measured data and numerical results using the two-level search strategy proposed. Numerical results show that the proposed two-level search strategy is often more efficient in quantification of damage extent than the direct search strategy when there are a lot of candidates in the possible damage domain. |
| Keywords: | damage identification frequencies genetic algorithm mode shapes two-level search strategy |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |