基于有限测点信息的大型空间网架结构智能工作状态评估技术研究
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摘要
针对大型空间网架结构的特点,建立基于有限测点信息的智能工作状态评估技术。该技术是首先通过测量少数网架结构杆件的响应信息,获得结构响应的峰因子;再通过安置在网架结构上的风压力传感器获得结构的荷载信息,采用BP神经网络法和加权荷载本征模态分解法分别精确识别作用在网架结构上的平均风荷载和脉动风荷载;并通过安置在网架结构上的加速度传感器获得结构在环境激励下的加速度响应信息,对结构进行有限元模型修正;然后采用正向演绎的方法,得到整个网架结构的工作状态,根据预先设定的安全级别就能对其进行工作状态的评估。最后,通过该技术成功地应用于深圳市民中心屋顶网架结构的智能健康监测系统中,说明该技术的可行性和有效性。
The technique of estimation for the intelligent working status of large space truss structures is established based on limited measurement information.The intelligent technique are as follows:first,the structural response peak factor is obtained by measuring the response of a few elements;then,the structural load information is obtained by installed wind pressure sensors,and the BP neural network method is adopted to identify the mean wind pressures and the weighted proper orthogonal decomposition method is applied to detect the characteristics of impulsive wind pressures at all internal nodes on the truss structure;next,the structural finite element model is updated by using information from finite acceleration sensors installed on the structure;finally,the entire truss structural working performance is obtained by a positive deductive method,and the structural working status is estimated according to the predetermined safety level.The feasibility and effectiveness of the proposed technique is verified by an application to the intelligent health monitoring system of the Shenzhen Citizen Center roof truss structure.
The technique of estimation for the intelligent working status of large space truss structures is established based on limited measurement information.The intelligent technique are as follows:first,the structural response peak factor is obtained by measuring the response of a few elements;then,the structural load information is obtained by installed wind pressure sensors,and the BP neural network method is adopted to identify the mean wind pressures and the weighted proper orthogonal decomposition method is applied to detect the characteristics of impulsive wind pressures at all internal nodes on the truss structure;next,the structural finite element model is updated by using information from finite acceleration sensors installed on the structure;finally,the entire truss structural working performance is obtained by a positive deductive method,and the structural working status is estimated according to the predetermined safety level.The feasibility and effectiveness of the proposed technique is verified by an application to the intelligent health monitoring system of the Shenzhen Citizen Center roof truss structure.
引文
[1]黄方林，王学敏，陈政清，等．大型桥梁健康监测研究进展[J]．中国铁道科学，2005，26(2)：1-7(Huang Fanglin,Wang Xuemin,Chen Zhengqing,et al.Research progress made on the health monitoring for large-type bridges[J].China Railway Science,2005,26(2):1-7(in Chinese))
[2]李运生，张彦玲．明石海峡大桥的监测[J]．世界桥梁，2002(3):52-54(Li Yunsheng,Zhang Yanling.Monitoring the Akashi Kaikyo Bridge[J].Foreign Bridges,2002(3): 52-54(in Chinese))
[3]张启伟．大型桥梁健康监测概念与监测系统设计[J]．同济大学学报：自然科学版，2001，29(1)：65-69(Zhang Qiwei.Conception of long-span bridge health monitoring and monitoring system design[J].Journal of Tongji University: Natural Science,2001,29(1):65-69(in Chinese))
[4]李惠，欧进萍．斜拉桥结构健康监测系统的设计与实现(Ⅰ，Ⅱ)[J]．土木工程学报，2006，39(4)：39-53(Li Hui,Ou Jinping.Design and implementation of health monitoring systems for cable-stayed bridges(Ⅰ,Ⅱ)[J]. China Civil Engineering Journal,2006,39(4):39-53(in Chinese))
[5]瞿伟廉，滕军，项海帆，等．风力作用下深圳市民中心屋顶网架结构的智能健康监测[J]．建筑结构学报，2006，27(1):1-8(Qu weilian,Teng Jun,Xiang Haifan,et al. Intelligent health monitoring for roof space truss structures of the Shenzhen Citizen Center under wind load[J].Journal of Building Structures,2006,27(1):1-8(in Chinese))
[6]Uematsu Y,Kuribara O,Yamada M,et al.Wind-induced dynamic behavior and its load estimation of a singer-layer latticed dome with a long span[J].Journal of Wind Engin- eering and Industrial Aerodynamics,2001,89(14-15): 1671-1687
[7]Baker C.Orthogonal decomposition of surface pressure fields [C]//Proceedings of the 10~(th) international conference on wind engineering.Copenhagen:[s.n.],1999
[8]Jeong S H,Bienkiewicz B,Han H J.Proper orthagonal decomposition of building wind pressure specified at non- uniformly distributed pressure taps[J].Journal of Wind Engineering and Industrial Aerodynamics,2000,87:1-14
[9]Uematsu Y,Kuribara O,Inoue A.Wind load and wind- induced dynamic behavior of a singer-layer latticed dome [J].Journal of Wind Engineering and Industrial Aerodynamics,1997,66(3):227-248
[10]刘晖，瞿伟廉，王雪亮，等．识别不均匀测点的风荷载的本征模态分解法[J]．武汉理工大学学报，2006，28(1)：59—61(Liu Hui,Qu Weilian,Wang Xueliang,et al. identification random wind pressure at non-uniformly distributed pressure taps with proper orthogonal decomposition method[J].Journal of Wuhan University of Technology,2006,28(1):59-61(in Chinese))
[11]瞿伟廉，黄东梅．高耸塔架结构节点损伤基于神经网络的两步诊断法[J]．地震工程与工程振动，2003，23(2)：143-149(Qu Weilian,Huang Dongmei.Two-step detection approach to joint damage in high-rise tower structures by using artificial neural network[J].Earthquake Engineering and Engineering Vibration,2003,23(2):143-149(in Chinese))
[12]Kammer D C.Sensor placement for on-orbit modal identification and correlation of large space structures[J]. Journal of Guidance,Control,and Dynamics,1991,14 (2):251-248
[13]Kammer D C.Effect model error on sensor placement for on-orbit medal identification of large space structures[J]. Journal of Guidance,Control,and Dynamics,1992,15 (2):334-341
[14]曹树谦，张文德，萧龙翔，等．振动结构模态分析[M]．天津：天津大学出版社，2001(Cao Shuqian,Zhang Wende,Xiao Longxiang,et al.Structural Vibration Medal Analysis[M]. Tianjin:Tianjin University Press,2001(in Chinese))
[2]李运生，张彦玲．明石海峡大桥的监测[J]．世界桥梁，2002(3):52-54(Li Yunsheng,Zhang Yanling.Monitoring the Akashi Kaikyo Bridge[J].Foreign Bridges,2002(3): 52-54(in Chinese))
[3]张启伟．大型桥梁健康监测概念与监测系统设计[J]．同济大学学报：自然科学版，2001，29(1)：65-69(Zhang Qiwei.Conception of long-span bridge health monitoring and monitoring system design[J].Journal of Tongji University: Natural Science,2001,29(1):65-69(in Chinese))
[4]李惠，欧进萍．斜拉桥结构健康监测系统的设计与实现(Ⅰ，Ⅱ)[J]．土木工程学报，2006，39(4)：39-53(Li Hui,Ou Jinping.Design and implementation of health monitoring systems for cable-stayed bridges(Ⅰ,Ⅱ)[J]. China Civil Engineering Journal,2006,39(4):39-53(in Chinese))
[5]瞿伟廉，滕军，项海帆，等．风力作用下深圳市民中心屋顶网架结构的智能健康监测[J]．建筑结构学报，2006，27(1):1-8(Qu weilian,Teng Jun,Xiang Haifan,et al. Intelligent health monitoring for roof space truss structures of the Shenzhen Citizen Center under wind load[J].Journal of Building Structures,2006,27(1):1-8(in Chinese))
[6]Uematsu Y,Kuribara O,Yamada M,et al.Wind-induced dynamic behavior and its load estimation of a singer-layer latticed dome with a long span[J].Journal of Wind Engin- eering and Industrial Aerodynamics,2001,89(14-15): 1671-1687
[7]Baker C.Orthogonal decomposition of surface pressure fields [C]//Proceedings of the 10~(th) international conference on wind engineering.Copenhagen:[s.n.],1999
[8]Jeong S H,Bienkiewicz B,Han H J.Proper orthagonal decomposition of building wind pressure specified at non- uniformly distributed pressure taps[J].Journal of Wind Engineering and Industrial Aerodynamics,2000,87:1-14
[9]Uematsu Y,Kuribara O,Inoue A.Wind load and wind- induced dynamic behavior of a singer-layer latticed dome [J].Journal of Wind Engineering and Industrial Aerodynamics,1997,66(3):227-248
[10]刘晖，瞿伟廉，王雪亮，等．识别不均匀测点的风荷载的本征模态分解法[J]．武汉理工大学学报，2006，28(1)：59—61(Liu Hui,Qu Weilian,Wang Xueliang,et al. identification random wind pressure at non-uniformly distributed pressure taps with proper orthogonal decomposition method[J].Journal of Wuhan University of Technology,2006,28(1):59-61(in Chinese))
[11]瞿伟廉，黄东梅．高耸塔架结构节点损伤基于神经网络的两步诊断法[J]．地震工程与工程振动，2003，23(2)：143-149(Qu Weilian,Huang Dongmei.Two-step detection approach to joint damage in high-rise tower structures by using artificial neural network[J].Earthquake Engineering and Engineering Vibration,2003,23(2):143-149(in Chinese))
[12]Kammer D C.Sensor placement for on-orbit modal identification and correlation of large space structures[J]. Journal of Guidance,Control,and Dynamics,1991,14 (2):251-248
[13]Kammer D C.Effect model error on sensor placement for on-orbit medal identification of large space structures[J]. Journal of Guidance,Control,and Dynamics,1992,15 (2):334-341
[14]曹树谦，张文德，萧龙翔，等．振动结构模态分析[M]．天津：天津大学出版社，2001(Cao Shuqian,Zhang Wende,Xiao Longxiang,et al.Structural Vibration Medal Analysis[M]. Tianjin:Tianjin University Press,2001(in Chinese))
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