【作者】 朱怀亮； 梁思辉； 罗仁安；

【Author】 Zhu Huailiang~1,Liang Sihui~2,Luo Renan~1 (1.Dept.of Mechanics.Shanghai University,Shanghai 200444,2 Shanghai Institute of Applied Math.& Mech.,Shanghai 200072)

【机构】 上海大学力学系； 上海市应用数学和力学研究所；

【摘要】 采用多重连接法的加固结构,其检测信号中包含了大量的噪声和非平稳信号,为结构的动态特性识别带来了困难。利用小波原理多分辨率的特点,在时域和频域内分析信号的局部特征,对测试信号进行降噪处理。以武汉市某优秀历史文物建筑为例,对加固前后的建筑物分别进行了实时动态检测,应用sym小波变换和分层阈值方法对小波系数作门限阈值处理,较准确地获得了结构系统的动力特性。更多还原

【Abstract】 It has some difficulty to indicate the dynamical behavior of civil building structure reinforced by multi-connection method,because there is much noise and unsmooth signal in the measured signal.Wavelet analysis is suitable for denoise processing due to its good localization in both frequency and time domains.In this study,the dynamical examination was carried out for a reinforcing excellent historical building of Wuhan in Hubei province China.Symletsa wavelet was used and layer-built denoising was proceeded in deal with the measured signals.Then,the dynamical behaviors were determined by Fourier transformation for the structure before reinforcement and after reinforcement.更多还原