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Understanding the Measured VIV Data of a Steel Catenary Riser Installed at P-18 Platform in Campos Basin

[+] Author Affiliations
Ricardo Franciss, Cláudia Peri dos Santos

Petrobras, Rio de Janeiro, RJ, Brazil

Paper No. OMAE2004-51177, pp. 363-368; 6 pages
doi:10.1115/OMAE2004-51177
From:
  • ASME 2004 23rd International Conference on Offshore Mechanics and Arctic Engineering
  • 23rd International Conference on Offshore Mechanics and Arctic Engineering, Volume 1, Parts A and B
  • Vancouver, British Columbia, Canada, June 20–25, 2004
  • Conference Sponsors: Ocean, Offshore, and Arctic Engineering Division
  • ISBN: 0-7918-3743-2 | eISBN: 0-7918-3738-6
  • Copyright © 2004 by ASME

abstract

This article describes some analyses made using the raw measured data on monitoring bottles installed at P-18 SCR. The bottles used to perform the acquisition are briefly described, as the equipment used to measure the oceanographic data. A FEM program in time domain ANFLEX was used to analyze the signal to obtain the natural frequencies and mode shapes to be used in SHEAR7 program. The raw data was transformed in engineering data and these data in time domain were transformed to frequency domain. Some comparison is shown like the evaluation if the first band of frequencies is due to the waves and the second band of frequencies is due to VIV. Finally, it is shown how the damage can be obtained directly using the data measured from the SCR, giving some results.

Copyright © 2004 by ASME

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