Application of time-frequency analysis to transient data from centrifuge earthquake testing

Article type: Research Article

Authors: David E. Newland, | Gary D. Butler,

Affiliations: Department of Engineering, University of Cambridge, Trumpington Street, Cambridge, CB2 1PZ, UK. E-mail: [email protected], [email protected]

Note: [] Also at US Army Engineer Research and Development Center

Abstract: Centrifuge model experiments have generated complex transient vibration data. New algorithms for time-frequency analysis using harmonic wavelets provide a good method of analyzing these data. We describe how the experimental data have been collected and show typical time-frequency maps obtained by the harmonic wavelet algorithm. Some preliminary comments on the interpretation of these maps are given in terms of the physics of the underlying model. Important features of the motion that are not otherwise apparent emerge from the analysis. Later papers will deal with their more detailed interpretation and their implications for centrifuge modeling.

Journal: Shock and Vibration, vol. 7, no. 4, pp. 195-202, 2000