Numerical simulation of ship-ice interactions with physics engines under consideration of ice breaking

Volume
2016-January
Start Page
1174
End Page
1180
Citation
Annual International Ocean and Polar Engineering Conference, ISOPE: 1174-1180 (2016)
Contribution to Conference
26th Annual International Ocean and Polar Engineering Conference, ISOPE 2016  
Scopus ID
2-s2.0-84987905537
A numerical model to predict the interaction between floating objects and the surrounding level ice is presented. Attention is restricted to breaking of level ice due to bending. The strategy refers to a semi-analytical ice-breaking model of Lubbad and Løset (2011). The approach essentially follows a route suggested by Nevel (1961) that simplifies the ice as an isotropic, homogeneous material under elastic foundation, that is subjected to bending stresses. Emphasis is given to modeling the process by contact forces between floating objects, i.e. The vessel, the level ice and the ice floes, in the framework of a physics engine. The breaking model computes the stresses in every floe that collides with the ship and determines the flexural failure and the crack length. The latter governs the amount and shape of interacting floating objects and their dynamic spatial discretization. As opposed to Lubbad's approach, the present method assumes the formation of circumferential cracks as a result of the bending moment in order to achive a more realistic breaking pattern. The ice-breaking model is validated for a two-dimensional elastic beam and the predictive limitations of the approach are discussed in line with suggestions for improvements and future work.
Subjects
Downward bending
Ice breaking
Open dynamics engine ODE
Ship-ice interaction