考虑作业工况的架桥机主梁损伤识别研究
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摘要
为防止架桥机主梁损伤诱发安全事故,进行作业工况下架桥机主梁损伤识别研究。以SXJ900/32型架桥机为研究对象,基于其架梁作业过程中主梁支承随时变化的现状,根据变形协调条件推导SXJ900/32型架桥机简化模型的力法方程;利用虚功原理求解结构挠度影响线的函数解析式,探求主梁支点存在高差情况下,基于挠度影响线曲率曲线的主梁损伤识别技术,并通过架桥机有限元模型仿真模拟进行验证分析。结果表明:利用架桥机主梁上测点的挠度影响线曲率曲线,可识别架桥机主梁的单点和多点损伤,但损伤处与测点的相对位置关系对损伤识别效果具有一定影响,结合2个测点的挠度影响线曲率曲线可取得最优识别效果;此外,利用挠度影响线曲率曲线不仅可识别损伤位置,还可较准确地量化判断损伤程度。
In order to prevent safety accidents caused by the main girder damage of bridge erecting machine, the damage identification for the main girder of bridge erecting machine under combined working conditions was studied. Taking SXJ900/32 bridge erecting machine as the research object, based on the current situation of the main girder support changing at any time during the operation of girder erection, the force-method equation of the simplified model of SXJ900/32 bridge erecting machine was derived according to the condition of deformation compatibility. The function analytic formula for the influence line of structural deflection was solved by the principle of virtual work. The damage identification technology of main girder based on the curvature curve of deflection influence line was explored in the case of the height difference between the fulcrums of the main girder, and the finite element model of bridge erecting machine was simulated to verify the analysis. Results show that the single point and multi-point damages on the main girder of bridge erecting machine can be identified by using the curvature curve of deflection influence line of the measuring point on the main girder. However, the effects of damage identification are affected to some extent by the relative location relationship between the damage location and the measuring point. The optimal recognition effect can be obtained by combining the curvature curves of deflection influence lines at two measuring points. In addition, the curvature curve of deflection influence line can not only identify the damage location, but also quantify the damage degree accurately.
In order to prevent safety accidents caused by the main girder damage of bridge erecting machine, the damage identification for the main girder of bridge erecting machine under combined working conditions was studied. Taking SXJ900/32 bridge erecting machine as the research object, based on the current situation of the main girder support changing at any time during the operation of girder erection, the force-method equation of the simplified model of SXJ900/32 bridge erecting machine was derived according to the condition of deformation compatibility. The function analytic formula for the influence line of structural deflection was solved by the principle of virtual work. The damage identification technology of main girder based on the curvature curve of deflection influence line was explored in the case of the height difference between the fulcrums of the main girder, and the finite element model of bridge erecting machine was simulated to verify the analysis. Results show that the single point and multi-point damages on the main girder of bridge erecting machine can be identified by using the curvature curve of deflection influence line of the measuring point on the main girder. However, the effects of damage identification are affected to some extent by the relative location relationship between the damage location and the measuring point. The optimal recognition effect can be obtained by combining the curvature curves of deflection influence lines at two measuring points. In addition, the curvature curve of deflection influence line can not only identify the damage location, but also quantify the damage degree accurately.
引文
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[10] 张超.基于动力特性的架桥机主梁结构损伤识别[D].石家庄:石家庄铁道大学,2014.(ZHANG Chao.Research of the Major Girder Structural Damage Based on Dynamic Characteristics[D].Shijiazhuang:Shijiazhuang Tiedao University,2014.in Chinese)
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[12] 赵文杰.基于神经网络的架桥机多重分步损伤识别[D].石家庄:石家庄铁道大学,2013.(ZHAO Wenjie.Multi-Hierarchical Damage Identification for Bridge Erector Based on Neural Network[D].Shijiazhuang:Shijiazhuang Tiedao University,2013.in Chinese)
[13] 贾亚平.基于挠度影响线的连续梁桥结构损伤识别研究[D].广州:广州大学,2014.(JIA Yaping.Research on Damage Identification of Continuous Girder Bridge Structures Based on Influence Line of Displacement[D].Guangzhou:Guangzhou University,2014.in Chinese)
[14] 张延庆,孙珂.存在局部损伤时转动弹性支承铁路梁桥的位移影响线分析[J].铁道学报,2016,38(2):124-130.(ZHANG Yanqing,SUN Ke.Analysis of Displacement Influence Line for Railway Bridge with Rotatable Elastic Support and Local Damage[J].Journal of the China Railway Society,2016,38(2):124-130.in Chinese)
[15] 程泳.基于挠度影响线的架桥机主梁损伤识别研究 [D].石家庄:石家庄铁道大学,2018.(CHENG Yong.Damage Identification of Bridge Erecting Machine Girders Based on Influence Line of Deflection[D].Shijiazhuang:Shijiazhuang Tiedao University,2018.in Chinese)
[2] BANDARA R P,CHAN T H T,THAMHIRATNAM D P.Structural Damage Detection Method Using Frequency Response Functions[J].Structural Health Monitoring,2014,13(4):418-429.
[3] CAMINERO M A,PAVLOPOULOU S,LOPEZ-PEDROSA M,et al.Analysis of Adhesively Bonded Repairs in Composites:Damage Detection and Prognosis[J].Composite Structures,2013,95:500-517.
[4] ZHONG Rumian,ZONG Zhouhong,NIU Jie,et al.A Damage Prognosis Method of Girder Structures Based on Wavelet Neural Networks[J].Mathematical Problems in Engineering,2014,2014:1155-1166.
[5] 战家旺,李明,卢洋,等.基于模型修正理论和频响函数模式置信准则的简支梁损伤动力评估方法[J].土木工程学报,2017,50(8):49-58,97.(ZHAN Jiawang,LI Ming,LU Yang,et al.Dynamic Evaluation Method for Damage of Simply-Supported Beams Based on Model Updating Theory and FRF Signature Assurance Criterion [J].China Civil Engineering Journal,2017,50(8):49-58,97.in Chinese)
[6] 战家旺,夏禾,张楠.基于在线振动响应的桥梁损伤识别方法[J].中国铁道科学,2011,32(3):58-62.(ZHAN Jiawang,XIA He,ZHANG Nan.Damage Identification Method for Bridges Using Online Vibration Responses [J].China Railway Science,2011,32(3):58-62.in Chinese)
[7] 刘云飞,辛克贵.移动荷载激励下基于平均曲率模态的简支梁局部损伤识别[J].工程力学,2013,30(7):205-211.(LIU Yunfei,XIN Kegui.Local Damage Detection of Simply Supported Beam on the Excitation of Moving Load Based on Average Curvature Modal[J].Engineering Mechanics,2013,30(7):205-211.in Chinese)
[8] 李延强,赵世英,杜彦良.基于最敏感斜拉索张力指标的斜拉桥主梁损伤识别方法[J].中国铁道科学,2014,35(2):20-25.(LI Yanqiang,ZHAO Shiying,DU Yanliang.Damage Identification Method for the Main Girder of Cable-Stayed Bridge Based on the Tension Indices of the Most Sensitive Stay Cable [J].China Railway Science,2014,35(2):20-25.in Chinese)
[9] 杨绍普,王丽英,潘存治.基于安全因子的大型施工机械安全分析[J].振动与冲击,2013,32(8):55-57.(YANG Shaopu,WANG Liying,PAN Cunzhi.Safety Analysis of Large Construction Machinery Based on Safety Factor Method[J].Journal Vibration and Shock,2013,32(8):55-57.in Chinese)
[10] 张超.基于动力特性的架桥机主梁结构损伤识别[D].石家庄:石家庄铁道大学,2014.(ZHANG Chao.Research of the Major Girder Structural Damage Based on Dynamic Characteristics[D].Shijiazhuang:Shijiazhuang Tiedao University,2014.in Chinese)
[11] 王丽英,杨绍普,赵卫国.基于改进布谷鸟搜索算法的架桥机结构损伤识别[J].北京交通大学学报,2013,37(4):168-173.(WANG Liying,YANG Shaopu,ZHAO Weiguo.Structural Damage Identification of Bridge Erecting Machine Based on Improved Cuckoo Search Algorithm[J].Journal of Beijing Jiaotong University,2013,37(4):168-173.in Chinese)
[12] 赵文杰.基于神经网络的架桥机多重分步损伤识别[D].石家庄:石家庄铁道大学,2013.(ZHAO Wenjie.Multi-Hierarchical Damage Identification for Bridge Erector Based on Neural Network[D].Shijiazhuang:Shijiazhuang Tiedao University,2013.in Chinese)
[13] 贾亚平.基于挠度影响线的连续梁桥结构损伤识别研究[D].广州:广州大学,2014.(JIA Yaping.Research on Damage Identification of Continuous Girder Bridge Structures Based on Influence Line of Displacement[D].Guangzhou:Guangzhou University,2014.in Chinese)
[14] 张延庆,孙珂.存在局部损伤时转动弹性支承铁路梁桥的位移影响线分析[J].铁道学报,2016,38(2):124-130.(ZHANG Yanqing,SUN Ke.Analysis of Displacement Influence Line for Railway Bridge with Rotatable Elastic Support and Local Damage[J].Journal of the China Railway Society,2016,38(2):124-130.in Chinese)
[15] 程泳.基于挠度影响线的架桥机主梁损伤识别研究 [D].石家庄:石家庄铁道大学,2018.(CHENG Yong.Damage Identification of Bridge Erecting Machine Girders Based on Influence Line of Deflection[D].Shijiazhuang:Shijiazhuang Tiedao University,2018.in Chinese)