不同模态振型在梁结构裂缝识别中的差异  

The Differentiation of Different Mode Shapes in Beam Structural Crack Identification

作　　者：张兵 

机构地区：[1]北京中色北方建筑设计院,北京100041

出　　处：《安徽建筑》2010年第2期178-179,共2页Anhui Architecture

摘　　要：采用Gaus2小波对多裂缝梁的不同模态振型进行小波变换,分析了不同模态振型在梁结构裂缝检测中的差别。同时,还采用最小二乘法算出各裂缝处的Lipschitz指数,进而分析了各模态振型函数在裂缝处的奇异性程度。结论表明:梁结构裂缝识别的效果主要由裂缝处的小波系数的模的大小决定。Wavelet transform of different mode shapes of the cracked beam is conducted with Gaus2;the differentiation of different mode shapes in beam structural crack detection is analyzed;meanwhile Lipschitz indexes of different cracks is figured out with least square method;and then the differentiation of different mode shapes in beam structural crack identification is presented.The result indicates that the effect of beam structural crack identification is mainly decided by wavelet coefficients＇ modulus at the cracking position.

关 键 词：裂缝识别 小波分析 Lipschitz指数 模态振型 

分 类 号：TU502[建筑科学—建筑技术科学]