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Keywords: mode shape
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Proceedings Papers
Paper presented at the The Ninth ISOPE Pacific/Asia Offshore Mechanics Symposium, November 14–17, 2010
Paper Number: ISOPE-P-10-044
... are identified by experimental vibration analysis in air and water. The natural frequencies and mode shapes are compared in air and water to obtain hydro-elastic effects. Some interesting results are found in the variation of natural frequencies and damping ratios of the circular cylindrical shell for different...
Proceedings Papers
Paper presented at the The Seventh ISOPE Pacific/Asia Offshore Mechanics Symposium, September 17–21, 2006
Paper Number: ISOPE-P-06-004
... ABSTRACT: In this paper, the modal strain energy index for detecting damaged diagonal member(s) of an offshore jacket structure using partial modal information is investigated. Only the first two mode shapes, with merely horizontal translational degree of freedoms (DOF) in each mode...
Proceedings Papers
Paper presented at the The Seventh ISOPE Pacific/Asia Offshore Mechanics Symposium, September 17–21, 2006
Paper Number: ISOPE-P-06-040
... to obtain the dynamic parameters of the structure, including the frequencies of the jacket platform, as well as the corresponding damping ratios and mode shapes. The Natural Excitation technology (NExT) combined with Eigensystem Realization Algorithm (ERA) and the peak picking (PP) method in frequency...
Proceedings Papers
Paper presented at the The First ISOPE Pacific/Asia Offshore Mechanics Symposium, June 24–28, 1990
Paper Number: ISOPE-P-90-017
... upper deck mode shape plpe jacket structure platform upstream oil & gas jacket offshore platform productlon platform jacket platform ollfleld platform accommodatlon platform frequency mode frequency subsea system experimental data prototype test bohal bay bel ollfleld...
Proceedings Papers
Paper presented at the The First ISOPE Pacific/Asia Offshore Mechanics Symposium, June 24–28, 1990
Paper Number: ISOPE-P-90-040
... and piles of length 1.9 m with elastic springs are presented. The influence of soil stiffness in the dynamic response has been investigated. The point of virtual fixity at different depths of piles for different soil stiffness are discussed. Differences in natural frequency, mode shapes and maximum...