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结构裂缝损伤识别的虚拟柔度矩阵法 被引量:3

Virtual Flexibility Matrix on Structural Crack Damage Detection
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摘要 柔度矩阵元素值小(10^-5~10^-6量级),直接用来判断结构的损伤容易受到噪声干扰.柔度矩阵元素反映的是结构整体信息,变化最大的不一定对应损伤部位.故利用柔度矩阵进行结构损伤识别尚存诸多缺陷.利用模态测试数据构造结构虚拟柔度矩阵,通过施加虚拟力的方法建立总体虚拟柔度矩阵与局部刚度变化之间的关系,根据广义应变变化率,可以同时得到损伤位置与损伤程度的识别结果.用简支梁的动力模型试验数据验证了算法应用的可行性. :Because of too small values(from 10^-5 to 10^-6)of flexibility matrix, it is prone to influencing from noise. Flexibility matrix elements show whole structural information, its maximal changes may not coincide with damage location. Hence damage detection by flexibility matrix still exists a good many limitation. Virtual flexibility matrix is built from modal test. The relation equation between virtual flexibility matrix and local stiffness change is completed by virtual forces. Damage location and severity are simultaneously obtained by generalized strain changes. It showed that the method is feasible through dynamic model test of simply supported beam.
出处 《四川大学学报(工程科学版)》 EI CAS CSCD 北大核心 2006年第2期39-42,共4页 Journal of Sichuan University (Engineering Science Edition)
关键词 虚拟柔度矩阵 脉冲激振试验 裂缝损伤 识别 Virtual flexibility matrix Impulse vibration test Crack damage Identification
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  • 1Pandy A K,Biswas M,Samman M M.Damage detection from changes in curvature mode shapes[J].J Sound and Vibration,1991,145(2):321-332.
  • 2Weixin Ren,Guido De Roeck.Structural damage identification using modal data I:Simulation verification[J].Journal of Structural Engineering,2002,(1):87-95.
  • 3Ma Namara J.Advances in health monitoring of railroad tracks[R].NDE for Hralth Monitoring and Diagnostics,San Diego,2002.4702-4730.
  • 4Hearn G,Testa R B.Modal analysis for damage detection in structures[J].Journal of Structural Engineering, 1991,117(11),3042-3063.
  • 5Ostnchowicz W M,Krawczuk M. Analysis of the effect of cracks on the natural frequency of a cantilever beam[J]. Journal of Sound and Vibration,1991,150(2):191-201.
  • 6Hearn G, Testa R B. Modal analysis for damage detection in structures[J]. Journal of Structural Engineering, ASCE, 1991,117:3042~3063.
  • 7Montalvao J M, Silva B,Aranjo Gomes A J M. Experimental dynamic analysis of cracked free-free beam[J]. Experim Mech, 1990,30(1):20~25.
  • 8Gao Fangqing,Jin Jianming,Gao Shuying.Structural damage detection method based on modal anlysis[J]. Southwest Jiaotong University Xuebao, 1998,33(1):108-113.[高芳清,金建明,高淑英.基于模态分析的结构损伤检测方法研究[J].西
  • 9杨建良,郭照华,黄德修.光纤机敏复合材料与结构及其信号处理的研究进展[J].力学进展,1998,28(2):189-197. 被引量:3
  • 10高芳清,金建明,高淑英.基于模态分析的结构损伤检测方法研究[J].西南交通大学学报,1998,33(1):108-113. 被引量:76

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