Author(s)

Fei Wang, Xiandong Kang

Corresponding Author

Fei Wang

ABSTRACT

Hilbert-Huang transform is introduced to analyze the response recordings under two earthquakes with different epicenter distances. The intrinsic mode functions are extracted and the components with diverse frequencies are identified. The components extracted are well consistent with the original signals in frequency. The analysis indicates the HHT method is an effective way to identify the dynamic characteristics. Based on the analysis results, the structural characteristics consistence is carried out for two earthquake recordings. The amplitude differences in frequency domain are noteworthy with great input energies. However, the normalized predominant frequencies are well consistent. The frequency contents are also comparable in target frequency band. The favorable consistency highlights the effectiveness of HHT application.

KEYWORDS

Hilbert-Huang transform, intrinsic mode function, predominant frequency, consistency analysis