损伤定位中频率法的改进及应用  

Improving of Frequence Method and Its Application in Damage Identification

作　　者：董晓马[1] 张为公[2] 

机构地区：[1]郑州航空工业管理学院,郑州450015 [2]东南大学,南京210096

出　　处：《航空材料学报》2006年第6期17-20,共4页Journal of Aeronautical Materials

基　　金：国家自然科学基金资助项目(90205031)

摘　　要：传统的基于频率的损伤定位指标是通过忽略结构运动摄动方程的二阶项得到的,用于结构的损伤位置识别可能导致误判。在对传统的基于频率的结构损伤位置识别机理进行了阐述基础上,理论推导改进的损伤定位指标。最后以复合材料悬臂梁进行数值模拟试验。试验结果表明,所建议的改进方法指标比原来方法指标更为有效。The traditional damage location index based on frequence was obtained by ignoring the second rank term in structural movement disturbed equation. There was likely to exist miscarriage of justice when it was applied to identify structural damage location. On the base of the traditional method, an improved method of frequence was given. Finally, the results of numerical value simulation experiment of composite material cantilever girder showed that the improved method was more effective than original method.

关 键 词：频率变化比 损伤识别 改进 

分 类 号：TB381[一般工业技术—材料科学与工程]