Ice model tests with a cylindrical structure to investigate dynamic ice-structure interaction
A physical analogous model of the lighthouse Norstrømsgrund has been built and tested in a series of model tests in ice at HSVA. The dynamic behavior of the lighthouse is simplified as a SDOF-system (single degree of freedom) by translational displacement in the ice plane, which is found to be justi...
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fttuhamburg:oai:tore.tuhh.de:11420/7495 2023-08-20T04:02:45+02:00 Ice model tests with a cylindrical structure to investigate dynamic ice-structure interaction Onken, G. Evers, Karl-Ulrich Haase, Andrea Jochmann, Peter 2014 http://hdl.handle.net/11420/7495 en eng Curran 22nd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2013 978-1-63266-549-2 22nd International Conference on Port and Ocean Engineering under Arctic Conditions (POAC 2013) : Espoo, Finland, 9 - 13 June 2013 / [Aalto University]. - Red Hook, NY : Curran. - Vols. 1(2014) - 2(2014) http://hdl.handle.net/11420/7495 2-s2.0-84905457329 600: Technik 620: Ingenieurwissenschaften Conference Paper Other 2014 fttuhamburg 2023-07-28T09:22:35Z A physical analogous model of the lighthouse Norstrømsgrund has been built and tested in a series of model tests in ice at HSVA. The dynamic behavior of the lighthouse is simplified as a SDOF-system (single degree of freedom) by translational displacement in the ice plane, which is found to be justified by full scale data. The model's natural frequency and stiffness are adjustable by correct choice of springs and additional mass. Several tests have proven the accuracy of adjustability. Stiffness as well as mass is subject to physical constraints, e.g. a minimum mass which can not be fallen short of and a maximum feasible stiffness. Due to these limitations, the model's stiffness had to be reduced. A reasonable approach to convert measured accelerations from model tests to the less compliant full scale structure has been found and used for the model test results. Several events of ice-induced vibrations have been observed. Measured forces and accelerations during dynamic ice-structure interaction at model scale are in good agreement with full scale measurements. The test set-up is suitable to provide realistic results on the dynamic behavior of cylindrical offshore structures. The paper describes the design of the test set-up, instrumentation and calibration, performance and analysis of conducted tests, and general findings. Conference Object Arctic TUHH Open Research (TORE - Technische Universität Hamburg) |
institution |
Open Polar |
collection |
TUHH Open Research (TORE - Technische Universität Hamburg) |
op_collection_id |
fttuhamburg |
language |
English |
topic |
600: Technik 620: Ingenieurwissenschaften |
spellingShingle |
600: Technik 620: Ingenieurwissenschaften Onken, G. Evers, Karl-Ulrich Haase, Andrea Jochmann, Peter Ice model tests with a cylindrical structure to investigate dynamic ice-structure interaction |
topic_facet |
600: Technik 620: Ingenieurwissenschaften |
description |
A physical analogous model of the lighthouse Norstrømsgrund has been built and tested in a series of model tests in ice at HSVA. The dynamic behavior of the lighthouse is simplified as a SDOF-system (single degree of freedom) by translational displacement in the ice plane, which is found to be justified by full scale data. The model's natural frequency and stiffness are adjustable by correct choice of springs and additional mass. Several tests have proven the accuracy of adjustability. Stiffness as well as mass is subject to physical constraints, e.g. a minimum mass which can not be fallen short of and a maximum feasible stiffness. Due to these limitations, the model's stiffness had to be reduced. A reasonable approach to convert measured accelerations from model tests to the less compliant full scale structure has been found and used for the model test results. Several events of ice-induced vibrations have been observed. Measured forces and accelerations during dynamic ice-structure interaction at model scale are in good agreement with full scale measurements. The test set-up is suitable to provide realistic results on the dynamic behavior of cylindrical offshore structures. The paper describes the design of the test set-up, instrumentation and calibration, performance and analysis of conducted tests, and general findings. |
format |
Conference Object |
author |
Onken, G. Evers, Karl-Ulrich Haase, Andrea Jochmann, Peter |
author_facet |
Onken, G. Evers, Karl-Ulrich Haase, Andrea Jochmann, Peter |
author_sort |
Onken, G. |
title |
Ice model tests with a cylindrical structure to investigate dynamic ice-structure interaction |
title_short |
Ice model tests with a cylindrical structure to investigate dynamic ice-structure interaction |
title_full |
Ice model tests with a cylindrical structure to investigate dynamic ice-structure interaction |
title_fullStr |
Ice model tests with a cylindrical structure to investigate dynamic ice-structure interaction |
title_full_unstemmed |
Ice model tests with a cylindrical structure to investigate dynamic ice-structure interaction |
title_sort |
ice model tests with a cylindrical structure to investigate dynamic ice-structure interaction |
publisher |
Curran |
publishDate |
2014 |
url |
http://hdl.handle.net/11420/7495 |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
22nd International Conference on Port and Ocean Engineering under Arctic Conditions, POAC 2013 978-1-63266-549-2 22nd International Conference on Port and Ocean Engineering under Arctic Conditions (POAC 2013) : Espoo, Finland, 9 - 13 June 2013 / [Aalto University]. - Red Hook, NY : Curran. - Vols. 1(2014) - 2(2014) http://hdl.handle.net/11420/7495 2-s2.0-84905457329 |
_version_ |
1774713354597695488 |