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Sensitivity analysis on measurement noise in the identification of soil properties from vertical array observation data
Author(s) -
Kurita Tetsushi,
Matsui Kunihito
Publication year - 1997
Publication title -
earthquake engineering and structural dynamics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.218
H-Index - 127
eISSN - 1096-9845
pISSN - 0098-8847
DOI - 10.1002/(sici)1096-9845(199709)26:9<951::aid-eqe687>3.0.co;2-h
Subject(s) - sensitivity (control systems) , logarithm , noise (video) , amplitude , transfer function , function (biology) , acoustics , observational error , frequency domain , geology , geotechnical engineering , mathematics , algorithm , engineering , statistics , mathematical analysis , computer science , electronic engineering , physics , optics , image (mathematics) , biology , electrical engineering , artificial intelligence , evolutionary biology
This study clarified the effects of measurement noise on identification of soil properties from vertical array observation of seismic waves. In order to evaluate the sensitivity of the unknown parameter with respect to error caused by noise, the amplitude of a transfer function was used to formulate the evaluation function in the frequency domain. Also the logarithmic amplitude was used to formulate the evaluation function and compare the sensitivity between the two types of amplitude expressions. A numerical experiment, based on a simple‐structured ground model, showed that these evaluation functions produced satisfactory results which were in good agreement with identified results obtained by the measurement data contaminated by artificially generated errors. The present theory, when applied to actual earthquake records, proved useful in evaluating the influence of the non‐linearity of soil characteristics. © 1997 by John Wiley & Sons, Ltd.