Hilbert-Huang变换在结构健康诊断中的应用研究

Application of Hilbert-Huang Transform to Structural Health Monitoring:Experimental Data

通过一个足尺的2层木结构房屋振动台试验,对Hilbert-Huang变换(HHT)在结构损伤诊断中的应用进行了研究与分析。在简要介绍了Hilbert-Huang变换的基本原理与方法后,根据在振动台试验中获取的结构反应数据,利用Hilbert-Huang变换对结构的动力特性及损伤状况进行了诊断。分析结果表明,Hilbert-Huang变换能有效地将隐含在实测结构反应信号中的结构动力特性与损伤信息进行提取,从而能对结构的健康状况进行诊断。

This paper examined the rationale of Hilbert-Huang transform（HHT） for structural health monitoring by using experimental data from shaking table testing of a full-size two-story wooden house conducted at the Disaster Prevention Research Institute（DPRI）,Kyoto University,Japan.A simplified review of the theory behind the HHT was given,and the ability of HHT to detect damage in structure was investigated by means of the recorded acceleration data.The analysis indicated that the HHT method was able to extract some damage characteristics from the field observations.The studies demonstrated potentials of HHT analysis for on-line damage detection by using true experimental data.