基于频响函数的悬臂结构损伤识别  

Damage Detection of Cantilever Structure Based on Frequency Response Function

作　　者：牛梓蓉 王仲刚[1] 杨朝山[1] 

机构地区：[1]后勤工程学院军事土木工程系,重庆401311

出　　处：《后勤工程学院学报》2015年第3期93-96,共4页Journal of Logistical Engineering University

摘　　要：根据频响函数的Neumann级数展开式,提出了悬臂结构的损伤识别方法。首先根据频响函数的Neumann级数展开式,推导了损伤参数与频响函数的关系式,以此为基础建立损伤识别方程组;其次,考虑到噪声影响,求解时采用了多频率点的最小二乘法,以减小由噪声引起的误差;最后用一个悬臂结构模型对所提方法进行了验证。Based on the Neumann series expansion of frequency response function, a damage identification method of cantile- ver structure was presented. Using the Neumann series expansion of frequency response function, the relationship between damage parameters and the frequency response function was firstly derived to obtain the damage detection equation. Considering the influ- ence of noise, the least square method of multi-frequency points was used to reduce the error caused by the noise. Finally, the effec- tiveness of the proposed method was verified through a cantilever structure model.

关 键 词：损伤识别 悬臂结构 频响函数 Neumann级数 

分 类 号：TU311.4[建筑科学—结构工程]