Numerical Simulation on the Response of Moored Semi-submersible Under Ice Load

• Published in: Journal of Ocean Engineering and Technology
• Main Authors: Jeong-Hwan Kim, Yooil Kim
• Format: Article in Journal/Newspaper
• Language: English
• Published: The Korean Society of Ocean Engineers 2018
• Subjects: Ice load and behavior; Semi-submersible rig; Pack ice condition; Finite element method; Drag force coefficient; Pressure-penetration relation; Ocean engineering; TC1501-1800; Sea ice
• Online Access: https://doi.org/10.26748/KSOE.2018.6.32.3.177; https://doaj.org/article/eac4d93c03254214a52d752bb28e6084

This study simulated ice load and the motion response of a moored semi-submersible rig in pack-ice conditions using a finite element method. Ice flows of random size and shape were modeled, and interactions for ice-sea, ice-structure, ice-ice were simulated using a simplified method. Parameters for the simplified method such as drag force coefficient and the pressure-penetration relation were obtained based on the result of detailed analysis using the coupled Eulerian-Lagrangian method. The mooring lines were modeled by spring elements based on their stiffness. As a result of the simulation over 1,400 seconds, the force and motion response of the rig were obtained and validated using discrete elements and compared with the results found by the Krylov State Research Centre.