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A Numerical Study on Slow-Drift Motion and Wave-in-Deck Impact Event of a Tension Leg Platform in Extreme Waves

[+] Author Affiliations
Bo-Woo Nam, Sa Young Hong

Korea Research Institute of Ships & Ocean Engineering (KRISO), Deajeon, South Korea

Hyun Joe Kim

Samsung Heavy Industries, Deajeon, South Korea

Paper No. OMAE2017-62334, pp. V001T01A083; 9 pages
doi:10.1115/OMAE2017-62334
From:
  • ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 1: Offshore Technology
  • Trondheim, Norway, June 25–30, 2017
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5763-2
  • Copyright © 2017 by ASME

abstract

Wave-in-deck impacts in extreme waves can cause a serious damage on both fixed and floating offshore structures. In particular, tension leg platform (TLP) can be exposed to frequent wave-in-deck impact events due to good vertical motion performances as well as wave amplifications inside columns. In this study, the wave-in-deck impact event as well as slow-drift motion response of a tension leg platform are numerically investigated. First, the experimental observations of the wave-in-deck events are suggested based on the model tests of a TLP, where the extreme waves of 100-year and 1,000 year return periods were tested. Both weak and strong wave-in-deck events are described in detail. Then, time-domain simulations were carried out to predict the motion responses of the TLP and wave-in-deck events. Appropriate numerical modeling is suggested to simulate the TLP motion responses. The numerical prediction results are directly compared with the model test data. Discussion is made on the appropriate numerical modeling for the prediction of the wave-in-deck impact event.

Copyright © 2017 by ASME

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