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Keywords: time-frequency distribution
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Proceedings Papers
EMD-HHT Based Structural Performance Assessment of an Offshore Platform
Available to Purchase
Paper presented at the The Twenty-second International Offshore and Polar Engineering Conference, June 17–22, 2012
Paper Number: ISOPE-I-12-632
... under mild environment. Field measurements were performed and vibration signals at different locations were recorded. Empirical mode decomposition (EMD) was applied to acquire the intrinsic mode functions (IMF). Then Hilbert-Huang transform (HHT) was used to compute the time-frequency distribution...
Proceedings Papers
Joint Time-Frequency Properties of Freak Waves
Available to Purchase
Paper presented at the The Fourteenth International Offshore and Polar Engineering Conference, May 23–28, 2004
Paper Number: ISOPE-I-04-326
... ABSTRACT In this paper, we discuss the joint time-frequency properties of a transient freak wave in order to distinguish the freak wave from non-freak waves in a quantitative manner. Exploring the use of an alternative to wavelet-based approaches, joint time-frequency distributions (TFDs), we...
Proceedings Papers
Time-Frequency Analysis of Dispersive Wave Phenomena
Available to Purchase
Paper presented at the The Tenth International Offshore and Polar Engineering Conference, May 28–June 2, 2000
Paper Number: ISOPE-I-00-221
... ABSTRACT In this paper we investigate the feasibility of using time frequency distributions to measure time-localized phase and group velocities given wave elevation time series measured at two points spatially separated in the direction of wave propagation. The results are compared to those...
Proceedings Papers
Comparison of Time-Frequency Representations of Random Wave Elevation Data
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Paper presented at the The Ninth International Offshore and Polar Engineering Conference, May 30–June 4, 1999
Paper Number: ISOPE-I-99-230
... ABSTRACT: This paper is concerned with examining the nonstationary characteristics of laboratory-generated random waves. To do this we utilize and compare a number of time-frequency distributions belonging to Cohen"s class, namely, the spectrogram, and the Wlgner- Ville, Choi-Williams...
