Simulation of full-scale ice–structure-interaction by an extended Matlock-model

Abstract An extended model of the ice–structure-interaction process in ice-induced vibrations has been derived from the Matlock-model. The model has been applied to full-scale simulations, including variations of ice and structure parameters. It turns out that some generalised assumptions – usually based on findings in small-scale experiments – cannot be transferred directly to large scales. In addition the present results show a dependency of the transition velocities from ductile to intermittent and intermittent to brittle behaviour both on ice and structure parameters. The same dependency holds for average ice forces resulting on the structure and for ice fracture frequencies.

[1]  Michael F. Ashby,et al.  Fracture and its Role in Determining Ice Forces on Offshore Structures , 1983, Annals of Glaciology.

[2]  Joachim Schwarz Validation of Low Level Ice Forces On Coastal Structures , 2001 .

[3]  George C. Lee,et al.  Cold Region Structural Engineering , 1986 .

[4]  Carl E. Morris,et al.  Characteristic frequency of force variations in continuous crushing of sheet ice against rigid cylindrical structures , 1986 .

[5]  Tuomo Kärnä,et al.  Nonlinear Loading Phase In Ice Indentation , 1996 .

[6]  Esa Eranti Dynamic ice structure interaction: Theory and applications , 1992 .

[7]  L. Fransson Some Observations of Continuous and Intermittent Crushing Failure of Ice , 2001 .

[8]  T. J. O. Sanderson,et al.  Ice Mechanics: Risks to Offshore Structures , 1988 .

[9]  Morten Bjerkås,et al.  Occurrence of Continuous and Intermittent Crushing During Ice-Structure Interaction , 2005 .

[10]  Esa Eranti GENERAL THEORY OF DYNAMIC ICE STRUCTURE INTERACTION WITH APPLICATIONS , 1991 .

[11]  D. Sodhi Crushing failure during ice–structure interaction , 2001 .

[12]  B. Michel,et al.  Mechanisms and Theory of Indentation of Ice Plates , 1977, Journal of Glaciology.

[13]  Robert B. Haehnel,et al.  Crushing Ice Forces on Structures , 2003 .

[14]  Tuomo Kärnä Finite ice failure depth in penetration of a vertical indentor into an ice edge , 1994, Annals of Glaciology.

[15]  Armin W. Troesch,et al.  Nonlinear Dynamic Response of a Simple Ice-Structure Interaction Model , 1993 .

[16]  Devinder S. Sodhi,et al.  Nonsimultaneous crushing during edge indentation of freshwater ice sheets , 1998 .

[17]  Wilford F. Weeks,et al.  Engineering Properties of Sea Ice , 1977, Journal of Glaciology.

[18]  Tuomo Kärnä,et al.  Dynamic response of narrow structures to ice crushing , 1989 .

[19]  Garry Timco,et al.  Ice loading on Danish wind turbines: Part 2. Analyses of dynamic model test results , 2005 .

[20]  Hyonny Kim,et al.  Compressive strength of ice at impact strain rates , 2007 .

[21]  Bernard Michel,et al.  The effect of fluid flow on the development of preferred orientations in sea ice: Laboratory experiments , 1989 .

[22]  Tuomo Kärnä,et al.  A numerical model for dynamic ice–structure interaction , 1999 .

[23]  Hisao Matsushita,et al.  Examination of factors affecting total ice load using medium scale field indentation test data , 2000 .