Title Numerical modelling of ice ridge keel action on subsea structures
Author Serre, N.
Author Affil Serre, N., Norwegian University of Science and Technology, Department of Civil and Transport Engineering, Trondheim, Norway
Source Cold Regions Science and Technology, 67(3), p.107-119, . Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0165- 232X
Publication Date July 2011
Notes In English. Based on Publisher- supplied data GeoRef Acc. No: 309694
Index Terms deformation; foundations; friction; ice; loads (forces); mathematical models; mechanical properties; cohesion; simulation; structures; thermal properties; thickness; velocity; dilation; equations; failures; finite element analysis; hydrostatic pressure; ice ridges; load pressure; load tests; marine installations; rubble ice; sensitivity analysis; shear strength
Abstract The present paper describes a numerical simulation of the keel-structure interaction where the keel geometry, ice thickness and interaction speed present a scaling ratio of 1:20. The rubble is represented by a Drucker-Prager material with cohesive softening and no dilatation. The partial differential equations are solved with the non-linear Eulerian finite element method of Abaqus Explicit V6.8.2. The results are compared to physical experiments conducted in the ice basin of the Hamburg ship model basin (HSVA). Two identical cubic subsea structures were impacted into the unconsolidated keel portion of two ice ridges with different thermal properties. The results indicate that only slight dilatation occurs, and the models are able to estimate the rubble action and deformed shape. A progressive failure of the rubble occurs. The rubble action is influenced more by the friction angle than it is in punch tests, due to higher confinement at the failure surface.
URL http://hdl.handle.net/10.1016/j.coldregions.2011.02.011
Publication Type journal article
Record ID 65006404