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Applications of the Static Condensation Technique to Nonlinear Structural Analysis of Floating Offshore Structures

[+] Author Affiliations
Min-Han Oh, Jong-Min Kim, Joong-Soo Moon, Woo-Seung Sim

Hyundai Heavy Industries, Ulsan, Korea

Seung-Hwan Boo, Phill-Seung Lee

Korea Advanced Institute of Science and Technology, Daejeon, Korea

Paper No. OMAE2017-61646, pp. V03BT02A031; 9 pages
  • ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 3B: Structures, Safety and Reliability
  • Trondheim, Norway, June 25–30, 2017
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5766-3
  • Copyright © 2017 by ASME


A cost effective finite element (FE) procedure is proposed for analysis of load-carrying structures with nonlinear contact and frictional behaviors between large floating offshore structures. The key of the procedure is to use the static condensation technique developed from the Guyan model reduction method. The time for computing contact and friction forces on contact interface areas can be dramatically reduced compared to nonlinear analysis with a full FE model. Two representative applications to offshore projects are presented. One is a problem with nonlinear contact of independent tank support in FLNG hull structures and the second is a sea-fastening system used during offshore dry transportation. The reliability and computing efficiency of the proposed analysis procedure are investigated. It is conclusively confirmed that the proposed procedure is practical for application to actual design of offshore projects.

Copyright © 2017 by ASME



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