《《Simulation of Ice Action Loads》.pdf

Page 1 of 12 Simulation of ice action loads on off shore structures 1 1 2 Dr. Daniel Hilding , Dr. Jimmy Forsberg and Dr. Arne Gürtner 1 Engineering Research Nordic AB, Linköping, Sweden 2 Statoil ASA, Research Centre Trondheim, Trondheim, Norway Abstract: During the last years, there has been an increasing amount of work published regarding simulation of ice action on structures using finite element models of the ice. The effect of ice fracture is in these models approximated using cohesive elements. In this article we give an overview of the cohesive element method for ice modelling including recent improvements made by the authors. A description is given of the implementation of the cohesive element method for modelling floating ice sheets in LS- DYNA including effects such as buoyancy. To demonstrate the performance and robustness of the implementation, numerical results are presented from a full scale simulation of an ice sheet impacting an offshore structure. Keywords: CEM, cohesive elements, erosion, buoyancy, ice modelling, failure, continuous crushing 8th European LS-DYNA Users Conference, Strasbourg - May 2011 Page 2 of 12 1 Introduction Today, structures which are designed for resistance against drifting sea ice sheets are dimensioned usi