000010267 001__ 10267
000010267 005__ 20141205155709.0
000010267 04107 $$aeng
000010267 046__ $$k2008-10-12
000010267 100__ $$aHu, Canyang
000010267 24500 $$aEstimation of Local Spectral Density of Seismogram by Orthogonal Hilbert-Huang Transform and Application of Spectral Density

000010267 24630 $$n14.$$pProceedings of the 14th World Conference on Earthquake Engineering
000010267 260__ $$b
000010267 506__ $$arestricted
000010267 520__ $$2eng$$aIt is necessary to describe earthquake ground motion with local spectral density, which is time-dependent and can reflect the non-stationary characteristics. Firstly, the paper introduces the approach using HHT to estimate local spectral density, which makes the local spectral density estimation very convenient by HHT transform. Secondly, the approach using the orthogonal HHT to estimate local spectral density is provided in the paper as a complementarity of HHT. Comparisons of estimating precision and speed are carried out among orthogonal HHT, HHT, STFT and Multifilter. The study shows that orthogonal HHT is a universal method avoiding leakage of energy compared with conventional HHT. So it is an efficient method to estimate local spectral density. Thirdly, the study illustrates that the local power spectra estimated by orthogonal HHT are able to reveal the temporal-frequency energy distribution for earthquake recordings precisely and clearly. Finally, integrated with the orthogonal HHT estimating local spectral density of earthquake ground motion, time-dependent power spectra is used as target power spectrum and the trigonometric series is used to simulate record of non-stationary earthquake ground motion.

000010267 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000010267 653__ $$anon-stationary random process, local spectral density estimation, Orthogonal HHT, simulation

000010267 7112_ $$a14th World Conference on Earthquake Engineering$$cBejing (CN)$$d2008-10-12 / 2008-10-17$$gWCEE15
000010267 720__ $$aHu, Canyang$$iChen, Qingjun$$iHuang, Tianli
000010267 8560_ $$ffischerc@itam.cas.cz
000010267 8564_ $$s658955$$uhttps://invenio.itam.cas.cz/record/10267/files/02-0171.pdf$$yOriginal version of the author's contribution as presented on CD, Paper ID: 02-0171.
000010267 962__ $$r9324
000010267 980__ $$aPAPER