Numerical Simulation of Arctic Offshore Structures Interacting with Level Ice and Nonlinear Time-Domain Simulations of Arctic Spar
One of the greatest challenges of developing the arctic regions is the harsh environmental conditions caused by the presence of ice. When offshore structures interact with ice, significant structural motion is induced by the ice load, which influences the overall structural robustness. In this study...
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fttexasamuniv:oai:oaktrust.library.tamu.edu:1969.1/174539 2023-07-16T03:56:08+02:00 Numerical Simulation of Arctic Offshore Structures Interacting with Level Ice and Nonlinear Time-Domain Simulations of Arctic Spar Jang, Hakun Kim, Moo-Hyun Falzarano, Jeffrey Mercier, Richard DiMarco, Steve 2019-01-23T20:56:26Z application/pdf https://hdl.handle.net/1969.1/174539 en eng https://hdl.handle.net/1969.1/174539 level ice arctic structure numerical simulation nonlinear time-domain arctic spar offshore wind turbine Thesis text 2019 fttexasamuniv 2023-06-27T22:22:02Z One of the greatest challenges of developing the arctic regions is the harsh environmental conditions caused by the presence of ice. When offshore structures interact with ice, significant structural motion is induced by the ice load, which influences the overall structural robustness. In this study, three different numerical tools are developed to investigate the ice-structure interaction using three scenarios. First, the fixed-type monopile offshore wind turbine in level ice is studied. Because the crushing is the dominant failure mode of level ice against a cylindrical structure, a mechanical ice-crushing model is developed to estimate the ice force on the structure in time domain. The model is further implemented into the wind turbine analysis software, FAST, developed by National Renewable Energy Laboratory (NREL). Second, the floating offshore platform, Artic Spar, in level ice is investigated by employing an analytical method. Artic Spar is characterized by the inverted cone-shaped hull near the waterline so that level ice can fail when bending. The fully coupled floater-riser-mooring dynamic analysis program, CHARM3D, is extended by implementing the analytical ice-bending model. Third, the numerical software for the interaction between level ice and an arbitrary-shaped floating offshore structure is developed by coupling two software programs, LIGGGHTS and CHARM3D. Based on the discrete element method, level ice is modelled as an assembly of multiple spherical particles, and the bonding parallel method is employed to consider the interaction force among the bonded particles. Throughout the newly developed numerical simulation tools, the ice load on different offshore structures is numerically estimated, and the corresponding structural performances are systematically investigated. In addition to these three ice-structure interactions, the nonlinear behavior or Arctic Spar is investigated in time domain. To capture the nonlinearity of platform motions, a nonlinear time-domain simulation tool considering ... Thesis Arctic Texas A&M University Digital Repository Arctic |
institution |
Open Polar |
collection |
Texas A&M University Digital Repository |
op_collection_id |
fttexasamuniv |
language |
English |
topic |
level ice arctic structure numerical simulation nonlinear time-domain arctic spar offshore wind turbine |
spellingShingle |
level ice arctic structure numerical simulation nonlinear time-domain arctic spar offshore wind turbine Jang, Hakun Numerical Simulation of Arctic Offshore Structures Interacting with Level Ice and Nonlinear Time-Domain Simulations of Arctic Spar |
topic_facet |
level ice arctic structure numerical simulation nonlinear time-domain arctic spar offshore wind turbine |
description |
One of the greatest challenges of developing the arctic regions is the harsh environmental conditions caused by the presence of ice. When offshore structures interact with ice, significant structural motion is induced by the ice load, which influences the overall structural robustness. In this study, three different numerical tools are developed to investigate the ice-structure interaction using three scenarios. First, the fixed-type monopile offshore wind turbine in level ice is studied. Because the crushing is the dominant failure mode of level ice against a cylindrical structure, a mechanical ice-crushing model is developed to estimate the ice force on the structure in time domain. The model is further implemented into the wind turbine analysis software, FAST, developed by National Renewable Energy Laboratory (NREL). Second, the floating offshore platform, Artic Spar, in level ice is investigated by employing an analytical method. Artic Spar is characterized by the inverted cone-shaped hull near the waterline so that level ice can fail when bending. The fully coupled floater-riser-mooring dynamic analysis program, CHARM3D, is extended by implementing the analytical ice-bending model. Third, the numerical software for the interaction between level ice and an arbitrary-shaped floating offshore structure is developed by coupling two software programs, LIGGGHTS and CHARM3D. Based on the discrete element method, level ice is modelled as an assembly of multiple spherical particles, and the bonding parallel method is employed to consider the interaction force among the bonded particles. Throughout the newly developed numerical simulation tools, the ice load on different offshore structures is numerically estimated, and the corresponding structural performances are systematically investigated. In addition to these three ice-structure interactions, the nonlinear behavior or Arctic Spar is investigated in time domain. To capture the nonlinearity of platform motions, a nonlinear time-domain simulation tool considering ... |
author2 |
Kim, Moo-Hyun Falzarano, Jeffrey Mercier, Richard DiMarco, Steve |
format |
Thesis |
author |
Jang, Hakun |
author_facet |
Jang, Hakun |
author_sort |
Jang, Hakun |
title |
Numerical Simulation of Arctic Offshore Structures Interacting with Level Ice and Nonlinear Time-Domain Simulations of Arctic Spar |
title_short |
Numerical Simulation of Arctic Offshore Structures Interacting with Level Ice and Nonlinear Time-Domain Simulations of Arctic Spar |
title_full |
Numerical Simulation of Arctic Offshore Structures Interacting with Level Ice and Nonlinear Time-Domain Simulations of Arctic Spar |
title_fullStr |
Numerical Simulation of Arctic Offshore Structures Interacting with Level Ice and Nonlinear Time-Domain Simulations of Arctic Spar |
title_full_unstemmed |
Numerical Simulation of Arctic Offshore Structures Interacting with Level Ice and Nonlinear Time-Domain Simulations of Arctic Spar |
title_sort |
numerical simulation of arctic offshore structures interacting with level ice and nonlinear time-domain simulations of arctic spar |
publishDate |
2019 |
url |
https://hdl.handle.net/1969.1/174539 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
https://hdl.handle.net/1969.1/174539 |
_version_ |
1771542288617439232 |