Abstract The HHT method based on clustering empirical mode decomposition(EEMD) is used to extract the time-frequency characteristics of the strong earthquake record of Kangding MS6.3 earthquake. The EEMD and Hilbert transform and spectrum analysis are performed on the strong vibration acceleration records acquired by each station. We compare with the Fourier transform. The results show that for nonlinear strong earthquake recording, EEMD can effectively suppress the modal aliasing problem existing in EMD. The results of the earthquake damage investigation in Kangding earthquake area show that the seismic damage characteristics of the collapsed building houses are more serious. It can be seen from the Hilbert marginal spectrum analysis that the main frequency of the stations in the earthquake zone is concentrated at around 10 Hz, and the instantaneous energy spectrum is high. The information is richer, and the poor seismic resistance of Tibetan buildings is also an important reason for the earthquake-damaged Tibetan-style structural houses.
LIANG Hong,LI Dahu,CHEN Xuefen et al. Time-Frequency Analysis and Earthquake Damage Characteristics of Acceleration Records from Kangding MS6.3 Earthquake on Nov 22,2014[J]. jgg, 2019, 39(8): 875-880.
LIANG Hong,LI Dahu,CHEN Xuefen et al. Time-Frequency Analysis and Earthquake Damage Characteristics of Acceleration Records from Kangding MS6.3 Earthquake on Nov 22,2014[J]. jgg, 2019, 39(8): 875-880.
