Numerical simulation of concrete abrasion induced by unbreakable ice floes
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This paper focuses on the numerical simulation of ice abrasion induced by unbreakable ice floe. Under the assumption that unbreakable floes behave as rigid body, the Discrete Element Method (DEM) was applied to simulate the interaction between a fixed structure and ice floes. DEM is a numerical technique which is eligible for computing the motion and effect of a large number of particles. In DEM simulation, individual ice floe was treated as single rigid element which interacts with each other following the given interaction rules. Interactions between the ice floes and structure were defined by soft contact and viscous Coulomb friction laws. To derive the details of the interactions in terms of interaction parameters, the Finite Element Method (FEM) was employed. An abrasion process between a structure and an ice floe was simulated by FEM, and the parameters in DEM such as contact stiffness, contact damping coefficient, etc. were calibrated based on the FEM result. Resultantly, contact length and contact path length, which are the most important factors in ice abrasion prediction, were calculated from both DEM and FEM and compared with each other. The results showed good correspondence between the two results, providing superior numerical efficiency of DEM.
Abstract
This paper focuses on the numerical simulation of ice abrasion induced by unbreakable ice floe. Under the assumption that unbreakable floes behave as rigid body, the Discrete Element Method (DEM) was applied to simulate the interaction between a fixed structure and ice floes. DEM is a numerical technique which is eligible for computing the motion and effect of a large number of particles. In DEM simulation, individual ice floe was treated as single rigid element which interacts with each other following the given interaction rules. Interactions between the ice floes and structure were defined by soft contact and viscous Coulomb friction laws. To derive the details of the interactions in terms of interaction parameters, the Finite Element Method (FEM) was employed. An abrasion process between a structure and an ice floe was simulated by FEM, and the parameters in DEM such as contact stiffness, contact damping coefficient, etc. were calibrated based on the FEM result. Resultantly, contact length and contact path length, which are the most important factors in ice abrasion prediction, were calculated from both DEM and FEM and compared with each other. The results showed good correspondence between the two results, providing superior numerical efficiency of DEM.
참고문헌 (19)
- Andersson, S., "Friction models for sliding dry, boundary and mixed lubricated contacts", Tribol. Int, 40, pp.580~587 (2007)
- Bekker, A., "Numerical simulation of the process of interaction between drifting ice fields and structure support", Proc. Of the Sixth ISOPE Pacific, 2004, 123~128
- Bekker, A., "Calculation of ice abrasion for the lighthouses installed in the Gulf of Bothnia", Proc. Of Port and Ocean Eng. Under Arctic Conditions (POAC) Conference, pp.155~160 (2011)
- Bekker, A., "Numerical simulation of ice abrasion on offshore structures", Proc. Of 21st IAHR International Symposium on Ice, pp.897~906 (2012)
- The Distinct Element Methods as a Tool for Research in Granular Media, Part I, "Cundall, P.", NSF, ~ (1978)
- Dorival, A., "A lattice model to simulate ice-structure interaction", International Conference on Offshore Mechanics and Arctic Engineering, pp.989~996 (2008)
- Hara, F., "Prediction of the degree of abrasion of bridge piers by fresh water ice and the protective measures", Concrete Under Severe Conditions, Consec’95, pp.485~494 (1995)
- Herman, A., "Discrete-element bonded-particle sea ice model DESIgn. version 1. 3a e model description and implementation", Geosci. Model Dev, 9, pp.1219~1241 (2016)
- Hilding, D., "Simulation of ice action loads on offshore structures", Proc. Of 8th European LS-DYNA Users Conference (2011)
- Huovinen, S., "Abrasion of Concrete by Ice in Arctic Sea Structures, 62", Doctorial, pp.1990
- Jacobsen, S., "Concrete-ice abrasion mechanics", Cement Concr. Res, 73, pp.79~95 (2015)
- Kim, H., "A numerical model for ice crushing on concave surfaces", Ocean Eng, 106, pp.289~297 (2015)
- Lindseth, S., "Splitting as a Load Releasing Mechanism for a Floater in Ice", Master, pp.2013
- Morgan, D., "Simulations of ice rubbling against conical structures using 3D DEM", Proc. Of Port and Ocean Eng. Under Arctic Conditions (POAC) Conference (2015)
- Ramos, N., "Lattice modelling of the onset of concrete-ice abrasion", Key Eng. Mater, 711, pp.351~358 (2016)
- Saeki, H., "Abrasion test for concrete due to sea ice. In: Proc. Of Port and Ocean Eng", Under Arctic Conditions (POAC) Conference (1987)
- Serre, N., "Numerical modelling of ice ridge keel action on subsea structures", Cold Reg. Sci. Technol, 67, pp.107~119 (2011)
- Sun, S., "Simulation of pancake ice load in a circular cylinder in a wave and current field", Cold Reg. Sci. Technol, 78, pp.31~39 (2012)
- Tijsen, J., "Experimental Study on the Development of Abrasion at Offshore Concrete Structures in Ice Conditions", Master, pp.2015