Đang chuẩn bị liên kết để tải về tài liệu:
Báo cáo hóa học: "Research Article Effects of Digital Filtering in Data Processing of Seismic Acceleration Records"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Processing of Seismic Acceleration Records | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2007 Article ID 29502 9 pages doi 10.1155 2007 29502 Research Article Effects of Digital Filtering in Data Processing of Seismic Acceleration Records Guergana Mollova Department of Computer-Aided Engineering University of Architecture Civil Engineering and Geodesy 1046 Sofia Bulgaria Received 12 April 2006 Revised 8 August 2006 Accepted 24 November 2006 Recommended by Liang-Gee Chen The paper presents an application of digital filtering in data processing of acceleration records from earthquakes. Butterworth Chebyshev and Bessel filters with different orders are considered to eliminate the frequency noise. A dataset under investigation includes accelerograms from three stations located in Turkey Dinar Izmit Kusadasi all working with an analogue type of seismograph SMA-1. Records from near-source stations to the earthquakes i.e. with a distance to the epicenter less than 20 km with different moment magnitudes Mw 3.8 6.4 and 7.4 have been examined. We have evaluated the influence of the type of digital filter on time series acceleration velocity displacement on some strong motion parameters PGA PGV PGD etc. and on the FAS Fourier amplitude spectrum of acceleration. Several 5 -damped displacement response spectra applying examined filtering techniques with different filter orders have been shown. SeismoSignal software tool has been used during the examples. Copyright 2007 Hindawi Publishing Corporation. All rights reserved. 1. INTRODUCTION This material presents a study on the influence of signal processing techniques digital filtering used in data processing of acceleration records from earthquakes. The recorded raw ground motion signals are always preprocessed by seismologists before any engineering and seismological analysis takes place. Strong-motion data processing has two main objectives to make the data useful for engineering analysis 1 correction for the response of .