摘要
本文对基于模态振型的结构损伤识别方法进行了研究,提出一个新的模态参数──振型差值曲率,阐述了用它作为参数进行结构损伤识别的思想与方法,然后建立了一个悬臂梁的数值模型,用有限元分析计算结果作为损伤诊断的依据,对不同的模拟损伤用本文所研究的方法进行了识别,结果表明采用振型差值曲率法可找到结构损伤的位置并确定结构损伤的程度,分析判断简便有效。
In this paper, we have studied the method of structure damage detection based on mode shape, and a new mode parameter--mode shape difference curvature is put forward to detect damages. Then we built up a numerical model of cantilever beam, and use the new method in this paper to detect its different damages by the result of the finite element analysis and calculation of the mode. The detection result shows the method based on mode shape difference curvature can detect the location and degree of the structure damage. Its analysis and judgment are simple and valid.
出处
《邢台职业技术学院学报》
2007年第1期25-28,共4页
Journal of Xingtai Polytechnic College
关键词
模态参数
振型差值曲率
结构损伤
mode parameter
mode shape difference curvature
structure damage
