Dynamic ice force estimation on a conical structure by discrete element method
1
조회
0
다운로드
1
인용
0
참고문헌
초록
This paper aims to numerically estimate the dynamic ice load on a conical structure. The Discrete Element Method (DEM) is employed to model the level ice as the assembly of numerous spherical particles. To mimic the realistic fracture mechanism of ice, the parallel bonding method is introduced. Cases with four different ice drifting velocities are considered in time domain. For validation, the statistics of time-varying ice forces and their frequencies obtained by numerical simulations are extensively compared against the physical model-test results. Ice properties are directly adopted from the targeted experimental test set up. The additional parameters for DEM simulations are systematically determined by a numerical three-point bending test. The findings reveal that the numerical simulation estimates the dynamic ice force in a reasonably acceptable range and its results agree well with experimental data.
Abstract
This paper aims to numerically estimate the dynamic ice load on a conical structure. The Discrete Element Method (DEM) is employed to model the level ice as the assembly of numerous spherical particles. To mimic the realistic fracture mechanism of ice, the parallel bonding method is introduced. Cases with four different ice drifting velocities are considered in time domain. For validation, the statistics of time-varying ice forces and their frequencies obtained by numerical simulations are extensively compared against the physical model-test results. Ice properties are directly adopted from the targeted experimental test set up. The additional parameters for DEM simulations are systematically determined by a numerical three-point bending test. The findings reveal that the numerical simulation estimates the dynamic ice force in a reasonably acceptable range and its results agree well with experimental data.
참고문헌 (25)
- Barker, A., "Ice loading on Danish wind turbines : part 1 : dynamic model tests", Cold Reg. Sci. Technol, 41(1), pp.1~23 (2005)
- Di, S., "Discrete element simulation of ice loads on narrow conical structures", Ocean Eng, 146, pp.282~297 (2017)
- Ehlers, S., "Optimization-based material parameter identification for the numerical simulation of sea ice in four-point bending", Proc. IME M J. Eng. Marit. Environ, 228(1), pp.70~80 (2014)
- Gravesen, H., "Ice loading on Danish wind turbines: Part 2. Analyses of dynamic model test results", Cold Reg. Sci. Technol, 41(1), pp.25~47 (2005)
- Hopkins, M. A., "Numerical Simulation of Systems of Multitudinous Polygonal Blocks", COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH., ~ (1992)
- Hopkins, M. A., "Four stages of pressure ridging", J. Geophys. Res.: Oceans, 103(C10), pp.21883~21891 (1998)
- Ji, S., "Analysis of ice load on conical structure with discrete element method", Eng. Comput, 32(4), pp.1121~1134 (2015)
- Ji, S., "DEM simulation of uniaxial compressive and flexural strength of sea ice : parametric study", J. Eng. Mech, 143(1), pp.C4016010~ (2017)
- Kloss, C., "Models, algorithms and validation for opensource DEM and CFDeDEM", Progr. Computat. Fluid Dyn. Int. J., 12(2-3), pp.140~152 (2012)
- Kujala, P., "Results from in situ four point bending tests with Baltic sea ice", Helsinki University of Technology, 1990, ~
- Løset, S., "Discrete element modelling of a broken ice fielddPart I : model development", Cold Reg. Sci. Technol, 22(4), pp.339~347 (1994)
- Liu, L., "Ice load on floating structure simulated with dilated polyhedral discrete element method in broken ice field", Appl. Ocean Res, 75, pp.53~65 (2018)
- Long, X., "The attributes of local ice pressure analyzed by discrete element method", Paper Presented at the Proceedings of the International Conference on Port and Ocean Engineering under Arctic Conditions (2017)
- Morgan, D., "Simulations of ice rubbling against conical structures using 3D DEM", Paper Presented at the Proceedings of the International Conference on Port and Ocean Engineering under Arctic Conditions (2015)
- Paavilainen, J., "Pressure distributions and force chains during simulated ice rubbling against sloped structures", Cold Reg. Sci. Technol, 85, pp.157~174 (2013)
- Paavilainen, J., "2D numerical simulations of ice rubble €formation process against an inclined structure", Cold Reg. Sci. Technol, 68(1-2), pp.20~34 (2011)
- Poloj€arvi, A., "3D discrete numerical modelling of ridge keel punch through tests", Cold Reg. Sci. Technol, 56(1), pp.18~29 (2009)
- Poloj€arvi, A., "On modeling cohesive ridge keel punch through tests with a combined finite-discrete element method", Cold Reg. Sci. Technol, 85, pp.191~205 (2013)
- Potyondy, D. O., "A bonded-particle model for rock", Int. J. Rock Mech. Min. Sci, 41(8), pp.1329~1364 (2004)
- Pradana, M. R., "Bridging local parameters with global mechanical properties in bonded discrete elements for ice load prediction on conical structures", Cold Reg. Sci. Technol, 173, pp.102960~ (2020)
- Sun, S., "Simulation of pancake ice load on a circular cylinder in a wave and current field", Cold Reg. Sci. Technol, 78, pp.31~39 (2012)
- Tian, Y., "The dynamic ice loads on conical structures", Ocean Eng, 59, pp.37~46 (2013)
- Xu, N., "Experimental study of dynamic conical ice force", Cold Reg. Sci. Technol, 120, pp.21~29 (2015)
- Yu, B., "Numerical simulation of dynamic ice force on conical structure", Paper Presented at the Proceedings of the International Conference on Port and Ocean Engineering under Arctic Conditions (2007)
- Yue, Q., "Ice force spectrum on narrow conical structures", Cold Reg. Sci. Technol, 49(2), pp.161~169 (2007)