基于失效树理论的结构多位置损伤检测方法
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摘要
在某一确定荷载作用下,结构不同部位的失效概率是不同的。为此提出了基于失效树理论进行人工神经网络样本采集的方法。在此基础上,采用人工神经网络和遗传算法进行结构动力损伤定位和损伤程度的估计。算例分析表明:基于失效树理论可以有效地减少训练样本的大小,从而有效的进行结构多损伤情况下的损伤检测分析。
Under a specified loading,the failure probability of different element is distinct.So we can get the training sample from the least reliable elements,based on the failure tree of the structures.Then we can apply the ANN and GA to identify the location and the severity prediction of damage.The numerical results of several examples show that failure tree-based sample is feasible for multiple damage detection of large-scale structures.
Under a specified loading,the failure probability of different element is distinct.So we can get the training sample from the least reliable elements,based on the failure tree of the structures.Then we can apply the ANN and GA to identify the location and the severity prediction of damage.The numerical results of several examples show that failure tree-based sample is feasible for multiple damage detection of large-scale structures.
引文
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[8]董聪,杨庆雄.冗余桁架结构系统可靠性分析理论与算法.计算结构力学及其应用.1992,9(4):393-398.
[9]刘天云,赵国藩.一种识别结构主要失效模式的有效算法.大连理工大学学报.1998,38(1):97-100.
[10]刘建华,董聪,张玉玲.天兴洲公铁两用长江大桥的失效树分析.中国铁道科学.2003,24(5):29-33.
[11]刘天云,吕克顺,赵国藩.钢筋砼框架结构的可靠性分析.大连理工大学学报.1998,38(2):223-227.
[12]董聪.现代结构系统可靠性理论及其应用[M].北京:科学出版社,2001.
[13]潘旦光.复杂结构损伤定位的人工神经网络多极区间估计法.清华大学博士后出站报告,2005.
[2]陈素文,李国强.基于BP网络的框架结构损伤的多重分步识别理论.地震工程与工程振动.2002,22(5):18-23.
[3]C.B.Yun,E.Y.Bahng.Substructural identification using neural networks [J].Computers and Structurals.2000,77:41-55.
[4]P.Thoft-Christensen,M.J.Baker.Structural reliability theory and its applications[M].Springer-Verlag Berlin,Heidelberg,New York,1982.
[5]F.Moses.System reliability developments in structural engineering [J].Structural Safety.1982,1:3-13.
[6]F.Moses.[J].New directions and research needs in system reliability research.Structural Safety.1990,7:93-100.
[7]Y.Feng.Enumerating significant failure modes of a structural system by using criterion methods[J].Computers and Structures.1988,30 (5):1153-1157.
[8]董聪,杨庆雄.冗余桁架结构系统可靠性分析理论与算法.计算结构力学及其应用.1992,9(4):393-398.
[9]刘天云,赵国藩.一种识别结构主要失效模式的有效算法.大连理工大学学报.1998,38(1):97-100.
[10]刘建华,董聪,张玉玲.天兴洲公铁两用长江大桥的失效树分析.中国铁道科学.2003,24(5):29-33.
[11]刘天云,吕克顺,赵国藩.钢筋砼框架结构的可靠性分析.大连理工大学学报.1998,38(2):223-227.
[12]董聪.现代结构系统可靠性理论及其应用[M].北京:科学出版社,2001.
[13]潘旦光.复杂结构损伤定位的人工神经网络多极区间估计法.清华大学博士后出站报告,2005.
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