Multichannel maximum entropy method of spectral analysis applied to offshore structures
Multichannel maximum entropy method of spectral analysis applied to offshore structures
Date
1981-06
Authors
Briggs, Michael Jeffrey
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DOI
10.1575/1912/2415
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Keywords
Offshore structures
Dynamics
Spectral theory
Entropy
Signal processing
Digital techniques
Dynamics
Spectral theory
Entropy
Signal processing
Digital techniques
Abstract
The multichannel Maximum Entropy Method (MEM) of
spectral analysis is developed and applied in the dynamic
analysis of offshore structures. Two different algorithms
are implemented and compared with the conventional
Blackman-Tukey method. These are (1) a direct on the data
or Burg method and (2) a Yule-Walker or correlation function
extension method. Cross-spectral estimates of magnitude,
phase, coherence squared, and transfer function are
calculated. These estimates are then used in mode shape
identification of a triple decked, single caisson offshore
platform. The superiority of the multichannel Maximum
Entropy Methods relative to conventional spectral analysis
techniques in calculating these cross-spectral estimates and
evaluating mode shapes is demonstrated.
Description
Submitted in partial fulfillment of the requirements for the degree of Ocean Engineer at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution June 1981
Note: Pages 88-89 do not appear in original document.
Note: Pages 88-89 do not appear in original document.
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Citation
Briggs, M. J. (1981). Multichannel maximum entropy method of spectral analysis applied to offshore structures [Doctoral thesis, Massachusetts Institute of Technology and Woods Hole Oceanographic Institution]. Woods Hole Open Access Server. https://doi.org/10.1575/1912/2415