空间网格结构动力检测时测点优化布置研究
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摘要
在对空间网格结构进行动力检测和损伤识别时需要掌握结构的动力特性,空间网格结构由于杆件数和节点数比较多,在进行动力检测时对结构所有的点都布置传感器显得不经济,从而需对测点的布置进行优化。基于应变能理论提出将杆件应变能参与系数转化到节点上,通过比较节点应变能参与系数的大小以及正则化振型位移分量的大小来确定空间网格结构测点的布置方案,旨在为以后同类型结构动力检测及健康监测时传感器的优化布置提供一定的参考。
To make the dynamic detection and identify the damage of space grid structure,dynamic characteristics of the structure need to be obtained.Because the grid structure has a large number of nodes and members,it is uneconomical to arrange test points at all nodes when detecting the dynamic characteristics of the structure,then it needs to optimize the arrangement of measuring points.In this paper,based on the strain energy theory,a method that the strain energy participation factor of a member is transformed to member nodes is proposed.By comparing the equivalent strain energy participation factor at nodes and the regularization mode component respectively,measuring point arrangement of space grid structure under equipment excitations is determined.Thus some reference is provided for the dynamic detection and the layout of sensor during the health monitoring of space grid structure.
To make the dynamic detection and identify the damage of space grid structure,dynamic characteristics of the structure need to be obtained.Because the grid structure has a large number of nodes and members,it is uneconomical to arrange test points at all nodes when detecting the dynamic characteristics of the structure,then it needs to optimize the arrangement of measuring points.In this paper,based on the strain energy theory,a method that the strain energy participation factor of a member is transformed to member nodes is proposed.By comparing the equivalent strain energy participation factor at nodes and the regularization mode component respectively,measuring point arrangement of space grid structure under equipment excitations is determined.Thus some reference is provided for the dynamic detection and the layout of sensor during the health monitoring of space grid structure.
引文
[1]董晓马,著.智能结构的损伤诊断研究及传感器优化配置[M].郑州:黄河水利出版社,2008.103-128
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[4]李东升,张莹,任亮,等.结构健康监测中传感器的布置方法及评价准则[J].力学进展.2011,1.41(1):39-50
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[8]吴金志.基于动力检测的网格结构损伤识别研究[D].北京:北京工业大学,2005.74-78
[9]郭国会.桥梁结构动力损伤诊断方法研究[D].长沙:湖南大学,2001.78-80
[2]Papadopoulos M,Garicia E.Sensor placement method ologies for dynamic testing.AIAA Journal,1998,36:163-256
[3]瞿伟廉,等.基于神经网络的大型空间网架结构的有限元模型修正[J].地震工程与工程振动.2003,23(4):83-89
[4]李东升,张莹,任亮,等.结构健康监测中传感器的布置方法及评价准则[J].力学进展.2011,1.41(1):39-50
[5]孙训方,等编.材料力学(Ⅰ)第四版[M].北京:高等教育出版社,2008.21-24
[6]Dynamic Design Solutions NVInc FEM tools user's guide[M].Leuven,Belgium:Dynamic Design Solution NVInc,2000.56-69
[7]北京金土木软件技术有限公司编著.SAP2000中文版使用指南[M].北京:人民交通出版社,2012.289-309
[8]吴金志.基于动力检测的网格结构损伤识别研究[D].北京:北京工业大学,2005.74-78
[9]郭国会.桥梁结构动力损伤诊断方法研究[D].长沙:湖南大学,2001.78-80
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