简支梁桥损伤程度识别的模拟和试验
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摘要
在结合钢桁桥损伤程度识别方法的基础上,提出了适用于简支梁结构的两种损伤程度识别方法:整体振型的相关系数法和保证准则法,将其应用到实验室简支梁结构上分别进行数值模拟和试验。脉冲激励下的结果表明,两种方法能较准确地识别损伤单元的等效损伤程度,具有很强的抗噪能力。最后,探讨了激励对提出方法的影响,为工程应用奠定了基础。
On the basis of the previous damage severity identification method of steel truss bridges,two damage severity identification methods of simply supported beam bridges are presented: correlation coefficient method and modal assurance criterion method of global mode shapes.Based on a simply supported beam model in the laboratory,both experimental and numerical simulation results under pulse excitation indicate that the proposed methods can identify the damage severity of damaged elements accurately and they have strong anti-noise-interference ability.Moreover,the effect of different excitation on results is examined in the methods;all of these lay a good foundation for engineering.
On the basis of the previous damage severity identification method of steel truss bridges,two damage severity identification methods of simply supported beam bridges are presented: correlation coefficient method and modal assurance criterion method of global mode shapes.Based on a simply supported beam model in the laboratory,both experimental and numerical simulation results under pulse excitation indicate that the proposed methods can identify the damage severity of damaged elements accurately and they have strong anti-noise-interference ability.Moreover,the effect of different excitation on results is examined in the methods;all of these lay a good foundation for engineering.
引文
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[9]Gao Y.Strctural health monitoring strategies forsmart sensor networks[D].Urbana-Champaign:Graduate College of the the University of Illinois atUrbana-Champaign,2005.
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[14]王正盛.特征值反问题的结构探伤方法[J].振动、测试与诊断,2010,30(4):446-450.Wang Zhengsheng.Inverse eigenvalue procedures fordamage detection in structure[J].Journal ofVibration,Measurement&Diagnosis,2010,30(4):446-450.(in Chinese)
[15]何浩祥,闫维明,张爱林,等.基于支持向量机的张弦梁损伤识别试验[J].振动、测试与诊断,2011,31(1):45-49.He Haoxiang,Yan Weiming,Zhang Ailin,et al.Analysis of wind-induced displacement response andwind-resistant capability of huge gas tank[J].Journalof Vibration,Measurement&Diagnosis,2011,31(1):45-49.(in Chinese)
[16]盛骤,谢式千,潘承毅.概率论与数理统计[M].北京:高等教育出版社,2001:129-131.
[17]Allemang R J,Brown D L.A correlation coefficientfor modal vector analysis[C]∥Proceedings of the 1stInternational Modal Analysis Conference.Orlando:Union College Press,1982:110-116.
[18]Juang J N,Pappa R S.An eigensystem realizationalgorithm for modal parameter identification andmodel reduction[J].Journal of Guidance,Control,and Dynamics,1985,8(5):620-627.
[2]欧进萍,关新春.土木工程智能结构体系的研究与发展[J].地震工程与工程振动,1999,19(2):21-28.Ou Jinping,Guan Xinchun.State-of-the-art of smartstructural systems in civil engineering[J].EarthquakeEngineering and Engineering Vibration,1999,19(2):21-28.(in Chinese)
[3]Morassi A.Damage detection and generalized Fouriercoefficients[J].Journal of Sound and Vibration,2007,302:229-259.
[4]Huth O,Feltrin G,Maeck J,et al.Damageidentification using modal data:experiences on aprestressed concrete bridge[J].Journal of StructuralEngineering,2005,12:1898-1919.
[5]Liu X,Lieven N A J,Escamilla-Ambrosio P J.Frequency response function shapebased methods forstructural damage localization[J].Mechanical Systemand Signal Processing,2009,23(4):1243-1259.
[6]Perera R,Huerta C,Orquín JM.Identification ofdamage in RC beams using indexes based on localmodal stiffness[J].Construction and BuildingMaterials,2008,22:1656-1667.
[7]Bernal D.Load vectors for damage localization[J].Journal of Engineering Mechanics,2002,128(1):7-14.
[8]Bernal D.Flexibility-based damage localization fromstochastic realization results[J].Journal ofEngineering Mechanics,2006,132(6):651-658.
[9]Gao Y.Strctural health monitoring strategies forsmart sensor networks[D].Urbana-Champaign:Graduate College of the the University of Illinois atUrbana-Champaign,2005.
[10]Gao Y,Spencer Jr B F,Bernal D.Experimentalverification of the flexibility-based damage locatingvector method[J].Journal of Engineering Mechanics,2007,133(10):1043-1049.
[11]An Yonghui,Ou Jinping.Experimental and numericalstudies on accurate damage location based on theSDLV method[C]∥5th World Conference onStructural Control and Monitoring.Tokyo:[s.n.],2010.
[12]An Yonghui,Ou Jinping.Experimental and numericalstudies on model updating method of damage severityidentification utilizing four cost functions[J].Journalof Structural Control and Health Monitoring,2013,20:107-120.
[13]郑飞,许金余,颜祥程.利用单元模态应变能法的地下框架结构损伤诊断[J].振动、测试与诊断,2010,30(6):642-645.Zheng Fei,Xu Jinyu,Yan Xiangcheng.Damagediagnosis of underground frame structure usingmethod of element modal strain energy[J].Journal ofVibration,Measurement&Diagnosis,2010,30(6):642-645.(in Chinese)
[14]王正盛.特征值反问题的结构探伤方法[J].振动、测试与诊断,2010,30(4):446-450.Wang Zhengsheng.Inverse eigenvalue procedures fordamage detection in structure[J].Journal ofVibration,Measurement&Diagnosis,2010,30(4):446-450.(in Chinese)
[15]何浩祥,闫维明,张爱林,等.基于支持向量机的张弦梁损伤识别试验[J].振动、测试与诊断,2011,31(1):45-49.He Haoxiang,Yan Weiming,Zhang Ailin,et al.Analysis of wind-induced displacement response andwind-resistant capability of huge gas tank[J].Journalof Vibration,Measurement&Diagnosis,2011,31(1):45-49.(in Chinese)
[16]盛骤,谢式千,潘承毅.概率论与数理统计[M].北京:高等教育出版社,2001:129-131.
[17]Allemang R J,Brown D L.A correlation coefficientfor modal vector analysis[C]∥Proceedings of the 1stInternational Modal Analysis Conference.Orlando:Union College Press,1982:110-116.
[18]Juang J N,Pappa R S.An eigensystem realizationalgorithm for modal parameter identification andmodel reduction[J].Journal of Guidance,Control,and Dynamics,1985,8(5):620-627.
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