空间网架结构损伤程度识别的数值模拟与试验研究
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摘要
空间网架杆件的损伤程度识别是网架结构健康检测中十分重要的环节,对网架结构的安全性和适用性起到决定性作用。在定位损伤杆件的前提下,通过模型试验和数值模拟手段,提出应用瞬态响应动力分析方法对四角锥网架杆件进行损伤程度识别,获得不同损伤程度杆件两端节点的位移时间历程曲线,应用Matlab对该曲线进行拟合分析。结果表明:在不同损伤工况下,损伤杆件两端节点的位移时间历程曲线可以近似拟合成直线,通过对该直线的斜率与杆件损伤程度的分析,分别得到上弦杆件、腹杆、下弦杆件两端节点的位移时间历程直线的斜率值与杆件损伤程度的关系式,通过该关系式可以较准确的识别出四角锥网架杆件的损伤程度。
The damage extents identification of members in space truss is an important part in health detection of space trusses.It plays a decisive role for the safety and applicability of truss structure.Based on the location of members damage,through experiment and simulation method,the analysis method of use transient dynamic response for the study about the damage extents identification of members in four pyramid space truss is put forward.The displacement-time history curve is educed about the different damage extents of members' node,and the curve-fitting analysis is made using Matlab.It shows that the displacement-time history curve of members' node can approximate synthesis of linear in different damage extents.Through the analysis abut slope of the line and the damage extents of members,it can educe the relation about the slope value,displacement-time history curve about top chord,bottom chord,wed member both ends of the node,and the damage extents of members.It can accurately identified the damage extents of four pyramid space truss members by the relation,which can be referenced in the damage extents identification of members in truss structure of practical engineering projects.
The damage extents identification of members in space truss is an important part in health detection of space trusses.It plays a decisive role for the safety and applicability of truss structure.Based on the location of members damage,through experiment and simulation method,the analysis method of use transient dynamic response for the study about the damage extents identification of members in four pyramid space truss is put forward.The displacement-time history curve is educed about the different damage extents of members' node,and the curve-fitting analysis is made using Matlab.It shows that the displacement-time history curve of members' node can approximate synthesis of linear in different damage extents.Through the analysis abut slope of the line and the damage extents of members,it can educe the relation about the slope value,displacement-time history curve about top chord,bottom chord,wed member both ends of the node,and the damage extents of members.It can accurately identified the damage extents of four pyramid space truss members by the relation,which can be referenced in the damage extents identification of members in truss structure of practical engineering projects.
引文
[1]李慧民.土木工程安全生产与事故案例分析[M].北京:冶金工业出版社,2015.
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[13]伍雪南,孙宗光,毕波,等.基于吊索局部振动与神经网络技术的悬索桥损伤定位[J].振动与冲击,2009,28(10):203-207.WU X N,SONG Z G,BI B,et al.Based on local vibration and sling suspension bridge damage localization of neural network technology[J].Journal of Vibration and Shock,2009,28(10):203-207.(in Chinese)
[14]SEYEDPOOR S M,MONTAZER M.A damage identification method for truss structures using a flexibility-based damage probability index and differential evolution algorithm[J].Inverse Problems in Science and Engineering,2016,24(8),1303-1322.
[15]张艳艳.利用时间历程法分析钻机井架的瞬态响应[J].油气田地面工程,2014,33(5):5-6.ZHANG Y Y.Time history method is used to analyze the transient response of drill derrick[J].Oil-Gas Field Surface Engineering,2014,33(5):5-6.(in Chinese)
[16]中华人民共和国住房和城乡建设部.空间网格结构技术规程:JGJ 7—2010[S].北京:中国建筑工业出版社,2010.Ministry of Housing and Urban-Rural Development of the People’s Republic of China.Technical specification for space frame structures:JGJ 7-2010[S].Beijing:China Architecture&Building Press,2010.(in Chinese)
[2]ALAMDARI M M,SAMALI B,LI J C.Damage localization based on symbolic time series analysis[J].Structural Control&Health Monitoring,2015,22(2):374-393.
[3]ZHU X,RIZZO P.Sensor array for the health monitoring of truss structures by means of guided ultrasonic waves[J].Journal of Civil Structural Health Monitoring,2014,4(3):221-234.
[4]KIM N I,KIM H,LEE J.Damage detection of truss structures using two-stage optimization based on micro genetic algorithm[J].Journal of Mechanical Science and Technology,2014,28(9):3687-3695.
[5]KIM N I,LEE S,AHN N,et al.Damage identification of truss structures based on force method[J].Advances in Applied Mathematics and Mechanics,2015,7(2):229-244.
[6]HE C F,YANG S,LIU Z H,et al.Damage localization and quantification of truss structure based on electromechanical impedance technique and neural network[J].Shock and Vibration,2014,21(2):218-317.
[7]MONTAZER M,SEYEDPOOR S M,PARK G.A new flexibility based damage index for damage detection of truss structures[J].Shock and Vibration,2014,21(2):167-172.
[8]KIM N I,LEE J.Damage identification of trusses with elastic supports using FEM and genetic algorithm[J].Advances in Mechanical Engineering,2013,5(2):584-901.
[9]OSORNIO-RIOS R A,AMEZQUITA-SANCHEZ J P,ROMERO-TRONCOSO R J,et al.MUSIC-ANN analysis for locating structural damages in a truss-type structure by means of vibrations[J].Computer-Aided Civil and Infrastructure Engineering,2012,27(9):687-698.
[10]VIOLA E,BOCCHINI P.Non-destructive parametric system identification and damage detection in truss structures by static tests[J].Structure and Infrastructure Engineering,2013,9(5):231-239.
[11]MAJUMDAR A,MAITI D K,MAITY D.Damage assessment of truss structures from changes in natural frequencies using ant colony optimization[J].Applied Mathematics and Computation,2012,218(19):9759-9772.
[12]宋玉普,刘志鑫,纪卫红.基于模态应变能与神经网络的钢网架损伤检测方法[J].土木工程学报,2007,40(10):13-18.SONG Y P,LIU Z X,JI W H.Based on modal strain enery and steel rack damage detection method of neural network[J].China Civil Engineering Journal,2007,40(10):13-18.(in Chinese)
[13]伍雪南,孙宗光,毕波,等.基于吊索局部振动与神经网络技术的悬索桥损伤定位[J].振动与冲击,2009,28(10):203-207.WU X N,SONG Z G,BI B,et al.Based on local vibration and sling suspension bridge damage localization of neural network technology[J].Journal of Vibration and Shock,2009,28(10):203-207.(in Chinese)
[14]SEYEDPOOR S M,MONTAZER M.A damage identification method for truss structures using a flexibility-based damage probability index and differential evolution algorithm[J].Inverse Problems in Science and Engineering,2016,24(8),1303-1322.
[15]张艳艳.利用时间历程法分析钻机井架的瞬态响应[J].油气田地面工程,2014,33(5):5-6.ZHANG Y Y.Time history method is used to analyze the transient response of drill derrick[J].Oil-Gas Field Surface Engineering,2014,33(5):5-6.(in Chinese)
[16]中华人民共和国住房和城乡建设部.空间网格结构技术规程:JGJ 7—2010[S].北京:中国建筑工业出版社,2010.Ministry of Housing and Urban-Rural Development of the People’s Republic of China.Technical specification for space frame structures:JGJ 7-2010[S].Beijing:China Architecture&Building Press,2010.(in Chinese)