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IceDyn/IceFloe

IceDyn and IceFloe are sets of routines that calculate time-domain loads induced by surface ice on offshore substructures.

They are intended for use with wind turbine aeroelastic simulation codes, including FAST.

IceDyn

The U.S. Department of Energy awarded the University of Michigan a project to create a model for interaction of bottom-fixed offshore wind turbines with surface ice for use with common simulation tools. The IceDyn module, which conforms to the standards of the FAST Modularization Framework, was created from this project.

The IceDyn module includes six ice mechanics models that incorporate ice floe forcing, deformation and failure and structure geometry. The six models are:

  • Quasi-static ice loading on vertical structure
  • Dynamic ice loading on vertical structure
  • Random ice loading on vertical structure
  • Non-simultaneous ice loading on vertical structure
  • Ice loading on sloping structure
  • Large ice floe impact.

This software was developed by Bingbin Yu and Dale Karr of University of Michigan.

IceFloe

The U.S. Department of Energy awarded the international accredited registrar and classification society, Det Norske Veritas and Germanischer Lloyd, a project to create a model for interaction of bottom-fixed offshore wind turbines with surface ice for use with common simulation tools. The IceFloe module, which conforms to the standards of the FAST Modularization Framework, was created from this project.

The IceFloe module includes the option to apply loads from several models to a monopole structure or a multileg structure of either three or four legs of the same diameter. For multileg support structures, the ice loads are calculated independently for each leg; however, factors based on sheltering of one leg by another are also used, which can be automatically applied or user-specified.

This software was developed by Tim McCoy of DNV KEMA Renewables Inc. (DNV GL).

Downloads

Ice Load Project Final Technical Report (8.8 MB, 30-Oct-2014)

This document is the final technical report on the U.S. Department of Energy project that developed IceFloe. It contains a theory appendix and user manual. Please refer to it for help in understanding how IceFloe works.