摘要
提升小波分析方法可以将信号按任意精度进行分解,具有优越的时、频局部化性能。文中在提升小波分析基础上提出了框架结构的损伤检测和识别方法。首先将结构加速度响应信号进行提升小波变换,然后采用单支重构的方法获取细节信号,通过细节信号的突变特征识别结构损伤情况,并用悬臂梁的数值模拟和三层框架模型结构试验验证了所提出方法的实用性。
The lifting wavelet analysis method can decompose the signal with arbitrary precision,and it has an excellent localized performance in time-frequency domain.On the basis of lifting wavelet analysis,a damage detection and identification method of frame structure is presented in this paper.First,the structural acceleration response signal is transformed by lifting wavelet.Then,the detail signal is reconstructed by using single-branch.The mutation characteristics of detail signal are used to identify the structural damage.And numerical simulation of a cantilever beam and model structure tests of three-story framework have verified the practicability of the method.
出处
《世界地震工程》
CSCD
北大核心
2010年第4期25-30,共6页
World Earthquake Engineering
基金
国家自然科学基金项目(50878198)
关键词
框架结构
损伤检测
损伤识别
提升小波分析
细节信号
frame structure
damage detection
damage identification
lifting wavelet analysis
detail signal
