结构连接刚度损伤的识别方法
|
摘要
通过钢桁架结构系统在模拟连接损伤工况下的动力特性参数测试,基于实测数据分析了各类动力指纹参数对连接刚度损伤识别的效果,提出了一种基于频段相关系数的结构连接刚度损伤识别方法.通过破损方案对比验证了此损伤识别方法的有效性,并利用有限元模拟对该识别方法的适用范围加以探讨.研究结果显示:频段相关系数作为一种新的损伤识别指纹参数能够反映连接刚度的损伤,并能够对连接刚度损伤量大小进行定性评估;利用结构低频段的频响函数对连接刚度损伤进行识别会获得较好的效果;该方法对平动自由度丧失类损伤的识别效果良好,而对转动自由度丧失类损伤的识别效果较差.
Tests on dynamic characteristics of connecting parts of a steel truss structure under various damage cases were carried out.Based on the measured data of the dynamic characteristics the effects of various dynamic eigen-parameters for damage identification of connecting stiffness in steel structures are analyzed.A new method for identifying damage in connecting stiffness based on frequency band correlation then is proposed.The effectiveness of this method is verified under different damage status,and the available scope of the proposed method is discussed with finite element simulation.The results show that frequency band correlation as a new eigen-parameter for damage identification can reflect and assess qualitatively the damage in connecting stiffness of steel structures,and it is effective when it is used with the measured data of low band of frequencies to realize damage detection of the connecting part.It is more suitable to identify the damage associated with translational degree of freedoms rather than with rotational degree of freedoms.
Tests on dynamic characteristics of connecting parts of a steel truss structure under various damage cases were carried out.Based on the measured data of the dynamic characteristics the effects of various dynamic eigen-parameters for damage identification of connecting stiffness in steel structures are analyzed.A new method for identifying damage in connecting stiffness based on frequency band correlation then is proposed.The effectiveness of this method is verified under different damage status,and the available scope of the proposed method is discussed with finite element simulation.The results show that frequency band correlation as a new eigen-parameter for damage identification can reflect and assess qualitatively the damage in connecting stiffness of steel structures,and it is effective when it is used with the measured data of low band of frequencies to realize damage detection of the connecting part.It is more suitable to identify the damage associated with translational degree of freedoms rather than with rotational degree of freedoms.
引文
[1]孙志星.桥梁健康诊断的研究现状与发展方向[J].中外建筑,2005(6):120-122.Sun Zhixing.Research state and the development direc-tion of bridge health diagnosis[J].Chinese and Over-seas Architecture,2005(6):120-122.(in Chinese)
[2]谢强,薛松涛.土木工程结构健康监测的研究现状与进展[J].中国科学基金,2001,15(5):285-288.Xie Qiang,Xue Songtao.Research state and advanceson structural health monitoring in civil engineering[J].Bulletin of National Science Foundation of China,2001,15(5):285-288.(in Chinese)
[3]Zong Z H,Wang T L,Huang D Z,et al.State-of-the-art report of bridge health monitoring[J].Journal ofFuzhou University:Natural Science,2002,30(2):127-152.
[4]闫桂荣,段忠东,欧进萍.基于结构振动信息的损伤识别研究综述[J].地震工程与工程振动,2007,27(3):95-103.Yan Guirong,Duan Zhongdong,Ou Jinping.Reviewon structural damage detection based on vibration data[J].Journal of Earthquake Engineering and Engineer-ing Vibration,2007,27(3):95-103.(in Chinese)
[5]谢俊,韩大建.一种改进的基于频率测量的结构损伤识别方法[J].工程力学,2004,21(1):21-25.Xie Jun,Han Dajian.An improved method for structur-al damage detection based on frequency measurement[J].Engineering Mechanics,2004,21(1):21-25.(in Chinese)
[6]Abdo M A B,Hori M.A numerical study of structuraldamage detection using changes in the rotation of modeshapes[J].Journal of Sound and Vibration,2002,251(2):227-239.
[7]Pandey A K,Biswas M.Damage detection in structuresusing changes in flexibility[J].Journal of Sound andVibration,1994,169(1):3-17.
[8]高维成,刘伟,邹经湘.基于结构振动参数变化的损伤探测方法综述[J]振动与冲击,2004,23(4):1-7.Gao Weicheng,Liu Wei,Zhou Jingxiang.Damage de-tection method based on changes of vibration parame-ters:a summary review[J].Journal of Vibration andShock,2004,23(4):1-7.(in Chinese)
[9]钱方.钢桁架结构的连接刚度损伤识别方法研究[D].南京:东南大学土木工程学院,2008.
[10]李兆霞,李爱群,陈鸿天.大跨桥梁结构以健康监测和状态评估为目标的有限元模拟[J].东南大学学报:自然科学版,2003,33(5):562-572.Li Zhaoxia,Li Aiqun,Chen Hontian.Finite elementmodeling for health monitoring and condition assess-ment of long-span bridges[J].Journal of Southeast U-niversity:Natural Science Edition,2003,33(5):562-572.(in Chinese)
[11]何文斌,李宏,许兰贵.基于ANSYS的液压支架强度有限元分析[J].煤矿机械,2006,27(10):91-93.He Wenbin,Li Hong,Xu Langui.Strength finite ele-ment analysis of hydraulic powered support based onANSYS[J].Coal Mine Machinery,2006,27(10):91-93.(in Chinese)
[12]魏磊磊,陆萍,王理鹏.液压支架销轴联接的约束处理[J].矿山机械,2006,34(6):48-49.Wei Leilei,Lu Ping,Wang Lipeng.Constraint pro-cessing of pin shaft connection of hydraulic support[J].Mining&Processing Equipment,2006,34(6):48-49.(in Chinese)
[2]谢强,薛松涛.土木工程结构健康监测的研究现状与进展[J].中国科学基金,2001,15(5):285-288.Xie Qiang,Xue Songtao.Research state and advanceson structural health monitoring in civil engineering[J].Bulletin of National Science Foundation of China,2001,15(5):285-288.(in Chinese)
[3]Zong Z H,Wang T L,Huang D Z,et al.State-of-the-art report of bridge health monitoring[J].Journal ofFuzhou University:Natural Science,2002,30(2):127-152.
[4]闫桂荣,段忠东,欧进萍.基于结构振动信息的损伤识别研究综述[J].地震工程与工程振动,2007,27(3):95-103.Yan Guirong,Duan Zhongdong,Ou Jinping.Reviewon structural damage detection based on vibration data[J].Journal of Earthquake Engineering and Engineer-ing Vibration,2007,27(3):95-103.(in Chinese)
[5]谢俊,韩大建.一种改进的基于频率测量的结构损伤识别方法[J].工程力学,2004,21(1):21-25.Xie Jun,Han Dajian.An improved method for structur-al damage detection based on frequency measurement[J].Engineering Mechanics,2004,21(1):21-25.(in Chinese)
[6]Abdo M A B,Hori M.A numerical study of structuraldamage detection using changes in the rotation of modeshapes[J].Journal of Sound and Vibration,2002,251(2):227-239.
[7]Pandey A K,Biswas M.Damage detection in structuresusing changes in flexibility[J].Journal of Sound andVibration,1994,169(1):3-17.
[8]高维成,刘伟,邹经湘.基于结构振动参数变化的损伤探测方法综述[J]振动与冲击,2004,23(4):1-7.Gao Weicheng,Liu Wei,Zhou Jingxiang.Damage de-tection method based on changes of vibration parame-ters:a summary review[J].Journal of Vibration andShock,2004,23(4):1-7.(in Chinese)
[9]钱方.钢桁架结构的连接刚度损伤识别方法研究[D].南京:东南大学土木工程学院,2008.
[10]李兆霞,李爱群,陈鸿天.大跨桥梁结构以健康监测和状态评估为目标的有限元模拟[J].东南大学学报:自然科学版,2003,33(5):562-572.Li Zhaoxia,Li Aiqun,Chen Hontian.Finite elementmodeling for health monitoring and condition assess-ment of long-span bridges[J].Journal of Southeast U-niversity:Natural Science Edition,2003,33(5):562-572.(in Chinese)
[11]何文斌,李宏,许兰贵.基于ANSYS的液压支架强度有限元分析[J].煤矿机械,2006,27(10):91-93.He Wenbin,Li Hong,Xu Langui.Strength finite ele-ment analysis of hydraulic powered support based onANSYS[J].Coal Mine Machinery,2006,27(10):91-93.(in Chinese)
[12]魏磊磊,陆萍,王理鹏.液压支架销轴联接的约束处理[J].矿山机械,2006,34(6):48-49.Wei Leilei,Lu Ping,Wang Lipeng.Constraint pro-cessing of pin shaft connection of hydraulic support[J].Mining&Processing Equipment,2006,34(6):48-49.(in Chinese)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心