基于模态参数和支持向量机的桁架结构损伤识别研究
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摘要
以桁架结构的损伤为研究对象,根据桁架结构的杆单元应变特点,建立了损伤前后振型曲率变化率和应变模态变化率对杆单元损伤的敏感性分析。同时以该变化率作为输入特征参数构造支持向量机,对杆单元的损伤进行识别,均取得了较为理想的结果。
Taking the truss structure damage as object of study,based on the unit strain characteristics of truss structure,it is done the sensitive analysis of the curvature mode rate and strain modal rate relating to the stem unit damage.Meanwhile the change rate is taken as input characteristic parameters to build support vector machine and identify the unit damage of the stem,with which a more ideal result has been obtained.
Taking the truss structure damage as object of study,based on the unit strain characteristics of truss structure,it is done the sensitive analysis of the curvature mode rate and strain modal rate relating to the stem unit damage.Meanwhile the change rate is taken as input characteristic parameters to build support vector machine and identify the unit damage of the stem,with which a more ideal result has been obtained.
引文
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[14]Pandey A K,Biswas M,Samman M M.Damage Detection fromChanges in Curvature Mode Shapes[J].Journal of Sound andVibration,1991,145(2):321-332.
[15]李国强,梁远森.振型曲率在板类结构动力检测中的应用[J].振动、测试与诊断,2004,24(2):111-116.
[2]胡自力,熊克,杨红.基于智能材料结构的几种损伤评价方法[J].航空学报2,002,23(1):1-5.
[3]高赞明,孙宗光,倪一清.基于振动方法的汲水门大桥损伤检测研究[J].地震工程与工程振动,2001(S1):117-124.
[4]Ko J M,Ni Y Q,Zhou X T,et al.Structural Damage Alaming inTing Kau Bridge Using Auto-Associative Neural Network∥Advances in Structural Dynamics[M].2000,Ⅱ:1021-1028.
[5]Kon C G,Zhao S L,Liaw C Y.Non-Destructive ParameterIdentification of Structures[R].NDE for Health Monitoring andDiagnostics,San Diego:2002,47:20-27.
[6]易伟健,刘霞.结构损伤诊断的遗传算法研究[J].系统工程理论与实践,2001(5):115-119.
[7]李宏男,李东升.土木工程结构安全评估、健康监测及诊断述评[J].地震工程与工程振动,2002,22(3):82-90.
[8]史治宇,吕令毅.由模态应变能法诊断结构破损的实验研究[J].东南大学学报,1999,29(2):134-138.
[9]陈江,熊峰.基于曲率模态振型的损伤识别方法研究[J].武汉理工大学学报,2007,29(3):99-102.
[10]Kim J T.Improved Damage Identification Method Based on ModalInformation[J].Journal of Sound and Vibration,2002,252(2):223-238.
[11]董聪.现代结构系统可靠性理论及应用[M].北京:科学出版社,2001:282-304.
[12]杜永峰,邵云飞.基于应变模态的桁架结构损伤指标研究[J].甘肃科学学报,2007,19(3):128-130.
[13]Vapnik V.统计学习理论的本质[M].张学工,译.北京:清华大学出版社,2000.
[14]Pandey A K,Biswas M,Samman M M.Damage Detection fromChanges in Curvature Mode Shapes[J].Journal of Sound andVibration,1991,145(2):321-332.
[15]李国强,梁远森.振型曲率在板类结构动力检测中的应用[J].振动、测试与诊断,2004,24(2):111-116.
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