摘要
提出了基于结构柔度矩阵的柔度曲率比法,该方法利用结构损伤前后的柔度矩阵差的主对角元素,计算结构的柔度曲率,并取与利用结构损伤前柔度矩阵主对角元素计算所得的柔度曲率的比值,即柔度曲率比,作为损伤识别指标,进行损伤识别.数值分析结果表明,该方法损伤定位准确,对损伤敏感,所需模态数据阶数少,能识别单个或多个损伤的存在.
Flexibility curvature rate method based on structure flexibility matrix is presented, which identificates the damages through the rates which curvatures of principal diagonal elements of flexibility matrix margin after damaging are divided by the ones of flexibility matrix before damaging. The numerical simulation results indicate that the method can locate the damages and sensitive to the damages exactly. Not only simple damage but also multiple ones can be identificated by the methold and only the lower mode parameters are needed.
出处
《长沙电力学院学报（自然科学版）》
2006年第1期85-88,共4页
JOurnal of Changsha University of electric Power:Natural Science
关键词
损伤识别
柔度矩阵
柔度曲率比
模态参数
damage identification
flexibility matrix
flexibility curvature rates
mode parameters
