BP神经网络在健康监测基准模型损伤识别中的应用
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摘要
本文针对ASCE提出的健康监测基准问题的结构模型,分析了基于固有频率的结构损伤识别方法,使用MATLAB软件模拟不同的结构损伤情况,根据得到的固有频率构造BP神经网络输入参数并进行相应的训练,通过神经网络对结构损伤分步分层次的进行诊断。通过数值分析结果说明这种方法可以取得较好结果,也进一步说明神经网络技术是进行结构损伤识别有效方法。
In this paper,with ASCE structural health monitoring benchmark model,a damage assessmentmethod based on natural frequencyis presented,and a step by step process of assessment with the use of BP neural network is analyzed by utilizing MATLAB software,which the network is formed by frequencies of the structure with different damage.The results of the simulated data revealthe method is feasibleand BP neural networkis efficienttechnology for damage assessment of structure.
In this paper,with ASCE structural health monitoring benchmark model,a damage assessmentmethod based on natural frequencyis presented,and a step by step process of assessment with the use of BP neural network is analyzed by utilizing MATLAB software,which the network is formed by frequencies of the structure with different damage.The results of the simulated data revealthe method is feasibleand BP neural networkis efficienttechnology for damage assessment of structure.
引文
[1]谢强,薛松涛土.木工程结构健康监测的研究现状与进展[R].中国科学基金,2001,(5):285-288
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[7]虞和济,陈长征,张省,周建男.基于神经网络的智能诊断[M].北京:冶金工业出版社,2000
[8]陈长征,罗跃纲,白秉三,唐忠.结构损伤检测与智能诊断[M].北京:科学出版社,2001
[9]Hagen M T,M enhajM B,Train ing feedforward networks w ith theLevenberg-Marquardt algorithm[J].IEEE Trains on Neural Net-works,1994,5(6);989-993
[10]许东,吴铮.基于MATLAB6.X的系统分析与设计—神经网络[M].西安:西安电子科技大学出版社,1998
[11]徐赵东,郭迎庆.MATLAB语言在建筑抗震工程中的应用[M].北京:科学出版社,2004
[2]李宏男,李东升.土木工程结构安全性评估健康监测及诊断述评地震工程与工程振动[J].2002年6月第22卷第3期
[3]Johnson E A,Lam H F,Katafygiotis L S,and Beck J L.Phase IIASC-ASCE StructuralHealth Mon itoring Benchmark Prob lem U-sing S imu lated Data[J],Journal of Engineering M echan ics,ASCE,January 2004:3-15
[4]Kam insk i P C.The Approximate Location of Damage through theAnalysis of Natural Frequencies w ith Artificial Neural Networks[J].Journal of Process M echan ical Engineering.1995,209:117~123
[5]Rytter A.V ibration based inspection of civil engineering structures[Ph.D.D issertation].Aalborg Un iversity,D enmark,1993
[6]万小朋,王军,赵美英.基于模态频率和神经网络的结构损伤检测[J].西北工业大学学报,2003年4月,第21卷第2期
[7]虞和济,陈长征,张省,周建男.基于神经网络的智能诊断[M].北京:冶金工业出版社,2000
[8]陈长征,罗跃纲,白秉三,唐忠.结构损伤检测与智能诊断[M].北京:科学出版社,2001
[9]Hagen M T,M enhajM B,Train ing feedforward networks w ith theLevenberg-Marquardt algorithm[J].IEEE Trains on Neural Net-works,1994,5(6);989-993
[10]许东,吴铮.基于MATLAB6.X的系统分析与设计—神经网络[M].西安:西安电子科技大学出版社,1998
[11]徐赵东,郭迎庆.MATLAB语言在建筑抗震工程中的应用[M].北京:科学出版社,2004
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