| 基于改进BP算法的刚框架连接损伤识别方法 |
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| 引用本文： | 李慧,王红丽,杜永峰,张冬兵.基于改进BP算法的刚框架连接损伤识别方法[J].甘肃科学学报,2007,19(2):114-117. |
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| 作者姓名： | 李慧 王红丽 杜永峰 张冬兵 |
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| 作者单位： | 兰州理工大学,防灾减灾研究所,甘肃,兰州,730050 |
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| 基金项目： | 甘肃省建设科技攻关资助项目 |
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| 摘 要： | 运用权值、阈值同步学习BP算法(简称为改进BP算法)对钢框架连接损伤进行识别,并且选用由结构正则化的频率变化率和少数点的振型模态分量构成的组合参数作为网络输入参数.通过对一个4层钢框架数值模拟,比较了改进算法和传统算法测试结果,从而证明改进算法更加精确、优越.
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| 关 键 词： | 结构连接损伤 识别 改进BP算法 组合参数 权值 阈值 |
| 文章编号： | 1004-0366（2007）02-0114-04 |
| 收稿时间： | 2006-07-10 |
| 修稿时间： | 2006-07-10 |
Identification of Connection Damage of Steel Frame Based on Improved BP Algorithm |
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| LI Hui,WANG Hong-li,DU Yong-feng,ZHANG Dong-bing.Identification of Connection Damage of Steel Frame Based on Improved BP Algorithm[J].Journal of Gansu Sciences,2007,19(2):114-117. |
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| Authors: | LI Hui WANG Hong-li DU Yong-feng ZHANG Dong-bing |
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| Affiliation: | Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Science and Technology, Lanzhou 730050, China |
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| Abstract: | The BP algorithm with weight and threshold synchro-learning ability(shortened as improved BP algorithm)is used to identify steel frame connection damage,and a synthesized parameter vector called combined parameter,which is obtained by combining the regularizing change rate of frequency and mode shape at a few selected points,is used as input parameter to improved BP algorithm.Through numerical simulation on a four-story steel frame,the test results of improved BP algorithm and traditional BP algorithm are compared.As a result,it is proved that the improved method is more accurate and more superior. |
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| Keywords: | structural connection damage identification improved BP algorithm combined parameters weight threshold |
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