Non-Linear Finite Elements Simulations of Level Ice Forces on Offshore Structures Using a Multi Surface Failure Criterion
Finite elements simulations of indentation loads caused by an ice sheet on a rigid conical offshore structure were carried out using the ANSYS structural commercial code (www.ansys. com). A square level ice sheet (20.0 m x 20.0 m) pushing a 10 m waterline diameter water cone was considered as the en...
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ftnrccanada:oai:cisti-icist.nrc-cnrc.ca:cistinparc:8896180 2023-05-15T14:21:23+02:00 Non-Linear Finite Elements Simulations of Level Ice Forces on Offshore Structures Using a Multi Surface Failure Criterion Martonen, P. Derradji-Aouat, A. Määttänen, M. Surkov, G. 2003 text https://nrc-publications.canada.ca/eng/view/object/?id=e936e80b-6a54-4c1c-b52c-c4d24d01303e https://nrc-publications.canada.ca/fra/voir/objet/?id=e936e80b-6a54-4c1c-b52c-c4d24d01303e unknown 17th International Conference on Port and Ocean Engineering Under Arctic Conditions [Proceedings], 17th International Conference on Port and Ocean Engineering Under Arctic Conditions, June 16-19, 2003 Trondheim, Norway, Publication date: 2003 report_number:IR-2003-07 ANSYSM multi surface article 2003 ftnrccanada 2021-09-01T06:36:25Z Finite elements simulations of indentation loads caused by an ice sheet on a rigid conical offshore structure were carried out using the ANSYS structural commercial code (www.ansys. com). A square level ice sheet (20.0 m x 20.0 m) pushing a 10 m waterline diameter water cone was considered as the engineering application. The interactions between the structure and the ice sheet were modeled using a nonlinear 3-D contact element formulation. The mechanical behaviour of ice (constitutive model for ice) is elastic, while its failure was modeled using a multi surface failure criterion. The latter includes the effects of the strain (loading) rate, temperature, salinity and porosity on the magnitude of ice strength. During the simulations, failed elements (i.e. elements that satisfy the stress conditions of failure criterion) were taken out from the initial geometry of the ice sheet. Therefore, the process and sequence for breaking ice pieced from the original ice sheet were modeled. This was achieved via developing and ANSYS macro (routine) for element death numerical technique. The validation of the numerical model is presented. The validation was achieved by comparing the computed ice loads from the numerical simulations with full-scale ice load measurements obtained form the Kemi-I test cone (Määttänen et al., 1996). In addition to the validation, the results of sensitivity and parametric analyses are presented and discussed. Conclusions and recommendations are provided. Peer reviewed: Yes NRC publication: Yes Article in Journal/Newspaper Arctic Ice Sheet National Research Council Canada: NRC Publications Archive |
institution |
Open Polar |
collection |
National Research Council Canada: NRC Publications Archive |
op_collection_id |
ftnrccanada |
language |
unknown |
topic |
ANSYSM multi surface |
spellingShingle |
ANSYSM multi surface Martonen, P. Derradji-Aouat, A. Määttänen, M. Surkov, G. Non-Linear Finite Elements Simulations of Level Ice Forces on Offshore Structures Using a Multi Surface Failure Criterion |
topic_facet |
ANSYSM multi surface |
description |
Finite elements simulations of indentation loads caused by an ice sheet on a rigid conical offshore structure were carried out using the ANSYS structural commercial code (www.ansys. com). A square level ice sheet (20.0 m x 20.0 m) pushing a 10 m waterline diameter water cone was considered as the engineering application. The interactions between the structure and the ice sheet were modeled using a nonlinear 3-D contact element formulation. The mechanical behaviour of ice (constitutive model for ice) is elastic, while its failure was modeled using a multi surface failure criterion. The latter includes the effects of the strain (loading) rate, temperature, salinity and porosity on the magnitude of ice strength. During the simulations, failed elements (i.e. elements that satisfy the stress conditions of failure criterion) were taken out from the initial geometry of the ice sheet. Therefore, the process and sequence for breaking ice pieced from the original ice sheet were modeled. This was achieved via developing and ANSYS macro (routine) for element death numerical technique. The validation of the numerical model is presented. The validation was achieved by comparing the computed ice loads from the numerical simulations with full-scale ice load measurements obtained form the Kemi-I test cone (Määttänen et al., 1996). In addition to the validation, the results of sensitivity and parametric analyses are presented and discussed. Conclusions and recommendations are provided. Peer reviewed: Yes NRC publication: Yes |
format |
Article in Journal/Newspaper |
author |
Martonen, P. Derradji-Aouat, A. Määttänen, M. Surkov, G. |
author_facet |
Martonen, P. Derradji-Aouat, A. Määttänen, M. Surkov, G. |
author_sort |
Martonen, P. |
title |
Non-Linear Finite Elements Simulations of Level Ice Forces on Offshore Structures Using a Multi Surface Failure Criterion |
title_short |
Non-Linear Finite Elements Simulations of Level Ice Forces on Offshore Structures Using a Multi Surface Failure Criterion |
title_full |
Non-Linear Finite Elements Simulations of Level Ice Forces on Offshore Structures Using a Multi Surface Failure Criterion |
title_fullStr |
Non-Linear Finite Elements Simulations of Level Ice Forces on Offshore Structures Using a Multi Surface Failure Criterion |
title_full_unstemmed |
Non-Linear Finite Elements Simulations of Level Ice Forces on Offshore Structures Using a Multi Surface Failure Criterion |
title_sort |
non-linear finite elements simulations of level ice forces on offshore structures using a multi surface failure criterion |
publishDate |
2003 |
url |
https://nrc-publications.canada.ca/eng/view/object/?id=e936e80b-6a54-4c1c-b52c-c4d24d01303e https://nrc-publications.canada.ca/fra/voir/objet/?id=e936e80b-6a54-4c1c-b52c-c4d24d01303e |
genre |
Arctic Ice Sheet |
genre_facet |
Arctic Ice Sheet |
op_relation |
17th International Conference on Port and Ocean Engineering Under Arctic Conditions [Proceedings], 17th International Conference on Port and Ocean Engineering Under Arctic Conditions, June 16-19, 2003 Trondheim, Norway, Publication date: 2003 report_number:IR-2003-07 |
_version_ |
1766294054205652992 |