This paper presents a numerical model intended to simulate the mooring force and the dynamic response of a moored structure in drifting ice. The mooring lines were explicitly modeled by using a generic cable model with a set of constraint equations providing desired structural properties such as the axial, bending, and torsional stiffness. The six degrees-of-freedom (DOF) rigid body motions of the structure were simulated by considering its interactions with the mooring lines and the drifting ice. In this simulation, a fragmented ice field of broken ice pieces could be considered under the effects of current and wave. The ice–ice and ice–structure interaction forces were calculated based on a viscoelastic-plastic rheological model. The hydrodynamic forces acting on the floating structure, mooring line, and drifting ice were simplified and calculated appropriately. The present study, in general, demonstrates the potential of developing an integrated numerical model for the coupled analysis of a moored structure in a broken ice field with current and wave.
Numerical Study of a Moored Structure in Moving Broken Ice Driven by Current and Wave
Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received December 25, 2017; final manuscript received October 19, 2018; published online January 17, 2019. Assoc. Editor: Carlos Guedes Soares.
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Su, B., Aarsæther, K. G., and Kristiansen, D. (January 17, 2019). "Numerical Study of a Moored Structure in Moving Broken Ice Driven by Current and Wave." ASME. J. Offshore Mech. Arct. Eng. June 2019; 141(3): 031501. https://doi.org/10.1115/1.4042263
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