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Simulations of Mountings on Offshore Platforms in Arctic Regions

[+] Author Affiliations
Josefine Michel, Steffen Garke, Patrick Kaeding

University of Rostock, Rostock, Germany

Paper No. OMAE2014-23018, pp. V010T07A001; 8 pages
doi:10.1115/OMAE2014-23018
From:
  • ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 10: Polar and Arctic Science and Technology
  • San Francisco, California, USA, June 8–13, 2014
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-4556-1
  • Copyright © 2014 by ASME

abstract

In the arctic offshore industry auxiliary systems are required for adequate living and working conditions. These systems comprise pipes and service modules on LNG ships as well as work and accommodation modules on offshore platforms. The object of this paper is an overview about the approach to simulate the different mounting systems on offshore/ship-structures in arctic regions: Which assumptions are made in the simulations? Which forces act on the systems? How are the results accomplished — by parameter studies, sub-model-technique? Where are the challenges located in the simulation? How can the runtime of the simulations be reduced?

In the case of pipe mountings, two different phases — installation and operation mode — as well as the cooling down of the insulating material between the two phases are considered. The result of this research topic is an automatic and parametric FE-Analysis of the structural limit state in these modes. The analysis of the twistlock system has been presented the last two years at OMAE. These systems are used to mount living and working modules on offshore platforms. The existing and new results will be discussed and evaluated. The accommodation modules are located in a containment — the so-called housing — attached to the deck. The required connection between this housing and the deck is analyzed. This analysis comprises welded and bolted connections. According to the stress results of the simulations the adequate connection is selected. These analyses are performed with the sub-model-technique in ANSYS.

Copyright © 2014 by ASME

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