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Investigation on the VIM Mitigation of the HVS Semisubmersible

[+] Author Affiliations
Johyun Kyoung, Jang Whan Kim, Hyunchul Jang, Kostas Lambrakos, Jim O’Sullivan

Technip, Houston, TX

Paper No. OMAE2015-41188, pp. V001T01A021; 10 pages
doi:10.1115/OMAE2015-41188
From:
  • ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 1: Offshore Technology; Offshore Geotechnics
  • St. John’s, Newfoundland, Canada, May 31–June 5, 2015
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5647-5
  • Copyright © 2015 by ASME

abstract

The mitigation of Vortex Induced Motion (VIM) of the HVS (Heave and VIM Suppressed) semisubmersible is investigated through extensive comparisons between CFD analysis and VIM model test results. It is shown that the lower VIM response of the HVS semisubmersible results from the break in coherence of vortex shedding along the length of column due to the column step. The present CFD application was carried out on the basis of in-house best practices for VIM analysis of multi-column floaters. The analysis results show excellent comparison with the model test results. The present findings and methodology can be applied to optimize semisubmersible hull designs for suppressed VIM response.

Copyright © 2015 by ASME

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