Abstract
In this paper, we introduce a novel algorithm for morphing any accelerogram into a spectrum matching one. First, the seed time series is re-expressed as a discrete Volterra series. The first-order Volterra kernel is estimated by amultilevel wavelet decomposition using the stationary wavelet transform. Second, the higher-order Volterra kernels are estimated using a complete multinomial mixing of the first-order kernel functions. Finally, the weighting of every term in this Volterra series is optimally adapted using a Levenberg-Marquardt algorithm such that the modified time series matches any target response spectrum. Comparisons are made using the SeismoMatch algorithm, and this reweighted Volterra series algorithm is demonstrated to be considerably more robust,matching the target spectrum more faithfully. This is achievedwhile qualitatively maintaining the original signal's nonstationary statistics, such as general envelope, time location of large pulses, and variation of frequency content with time.
Original language | English |
---|---|
Pages (from-to) | 1663-1673 |
Number of pages | 11 |
Journal | Bulletin of the Seismological Society of America |
Volume | 104 |
Issue number | 4 |
DOIs | |
Publication status | Published - Aug 2014 |
Fingerprint
Dive into the research topics of 'Obtaining spectrum matching time series using a reweighted volterra series algorithm (RVSA)'. Together they form a unique fingerprint.Profiles
-
Professor Adam J Crewe
- School of Civil, Aerospace and Design Engineering - Professor of Earthquake Engineering
- Cabot Institute for the Environment
- Earthquake and Geotechnical Engineering
Person: Academic , Member