Ice action on compliant structures

Laboratory indentation tests

Tuomo Kärnä, Kari Kolari, Peter Jochmann, Karl-Ulrich Evers, Bi Xiangjun, Mauri Määttänen, Petter Martonen

Research output: Book/ReportReportProfessional

Abstract

This experimenal research addresses the dynamic ice-structure interaction of marine structures. The main objective was to obtain data on the phenomenon known as steady-state vibration of vertical offshore structures. Such data is needed while researcers develop numerical and simplified models of the vibration. A further objective was to find data on ice-induced vibrations of conical structures. A common belief has been that ice can not create significant vibrations on conical offshore structures. Recent full-scale data has shown that this assumption is not correct. Hence, the present project aimed at obtaining laboratory data on this kind of vibrations. The third aim of the project was to demonstrate that additional structural damping can be used to mitigate the dynamic response caused by ice actions. Tests were done at the ice basin of the ARCTECLAB using the carriage of the ice basin. An experimental structure was installed on the carriage and penetration tests were done on three sheets of columnar grained ice. The dynamic properties of the structure were modified during the test series. Two different indontors were used, a vertical cylinder and a cone. This test report provides detailed descriptions of the test set up and the test programme. The main results are also shown in terms of the measured time signals. The report serves as a background document for more detailed analysis and subsequent exploration of the data.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages125
ISBN (Electronic)951-38-6201-1
ISBN (Print)951-38-6200-3
Publication statusPublished - 2003
MoE publication typeNot Eligible

Publication series

NameVTT Tiedotteita - Research Notes
PublisherVTT
No.2223
ISSN (Print)1235-0605
ISSN (Electronic)1455-0865

Fingerprint

Indentation
Ice
Offshore structures
Ocean structures
Dynamic response
Cones
Damping

Keywords

  • marine structures
  • offshore structures
  • steady-state vibrations
  • ice-induced vibrations
  • conical structures
  • dynamic response
  • measurement
  • testing
  • numerical analysis
  • models

Cite this

Kärnä, T., Kolari, K., Jochmann, P., Evers, K-U., Xiangjun, B., Määttänen, M., & Martonen, P. (2003). Ice action on compliant structures: Laboratory indentation tests. Espoo: VTT Technical Research Centre of Finland. VTT Tiedotteita - Meddelanden - Research Notes, No. 2223
Kärnä, Tuomo ; Kolari, Kari ; Jochmann, Peter ; Evers, Karl-Ulrich ; Xiangjun, Bi ; Määttänen, Mauri ; Martonen, Petter. / Ice action on compliant structures : Laboratory indentation tests. Espoo : VTT Technical Research Centre of Finland, 2003. 125 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 2223).
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Kärnä, T, Kolari, K, Jochmann, P, Evers, K-U, Xiangjun, B, Määttänen, M & Martonen, P 2003, Ice action on compliant structures: Laboratory indentation tests. VTT Tiedotteita - Meddelanden - Research Notes, no. 2223, VTT Technical Research Centre of Finland, Espoo.

Ice action on compliant structures : Laboratory indentation tests. / Kärnä, Tuomo; Kolari, Kari; Jochmann, Peter; Evers, Karl-Ulrich; Xiangjun, Bi; Määttänen, Mauri; Martonen, Petter.

Espoo : VTT Technical Research Centre of Finland, 2003. 125 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 2223).

Research output: Book/ReportReportProfessional

TY - BOOK

T1 - Ice action on compliant structures

T2 - Laboratory indentation tests

AU - Kärnä, Tuomo

AU - Kolari, Kari

AU - Jochmann, Peter

AU - Evers, Karl-Ulrich

AU - Xiangjun, Bi

AU - Määttänen, Mauri

AU - Martonen, Petter

PY - 2003

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N2 - This experimenal research addresses the dynamic ice-structure interaction of marine structures. The main objective was to obtain data on the phenomenon known as steady-state vibration of vertical offshore structures. Such data is needed while researcers develop numerical and simplified models of the vibration. A further objective was to find data on ice-induced vibrations of conical structures. A common belief has been that ice can not create significant vibrations on conical offshore structures. Recent full-scale data has shown that this assumption is not correct. Hence, the present project aimed at obtaining laboratory data on this kind of vibrations. The third aim of the project was to demonstrate that additional structural damping can be used to mitigate the dynamic response caused by ice actions. Tests were done at the ice basin of the ARCTECLAB using the carriage of the ice basin. An experimental structure was installed on the carriage and penetration tests were done on three sheets of columnar grained ice. The dynamic properties of the structure were modified during the test series. Two different indontors were used, a vertical cylinder and a cone. This test report provides detailed descriptions of the test set up and the test programme. The main results are also shown in terms of the measured time signals. The report serves as a background document for more detailed analysis and subsequent exploration of the data.

AB - This experimenal research addresses the dynamic ice-structure interaction of marine structures. The main objective was to obtain data on the phenomenon known as steady-state vibration of vertical offshore structures. Such data is needed while researcers develop numerical and simplified models of the vibration. A further objective was to find data on ice-induced vibrations of conical structures. A common belief has been that ice can not create significant vibrations on conical offshore structures. Recent full-scale data has shown that this assumption is not correct. Hence, the present project aimed at obtaining laboratory data on this kind of vibrations. The third aim of the project was to demonstrate that additional structural damping can be used to mitigate the dynamic response caused by ice actions. Tests were done at the ice basin of the ARCTECLAB using the carriage of the ice basin. An experimental structure was installed on the carriage and penetration tests were done on three sheets of columnar grained ice. The dynamic properties of the structure were modified during the test series. Two different indontors were used, a vertical cylinder and a cone. This test report provides detailed descriptions of the test set up and the test programme. The main results are also shown in terms of the measured time signals. The report serves as a background document for more detailed analysis and subsequent exploration of the data.

KW - marine structures

KW - offshore structures

KW - steady-state vibrations

KW - ice-induced vibrations

KW - conical structures

KW - dynamic response

KW - measurement

KW - testing

KW - numerical analysis

KW - models

M3 - Report

SN - 951-38-6200-3

T3 - VTT Tiedotteita - Research Notes

BT - Ice action on compliant structures

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Kärnä T, Kolari K, Jochmann P, Evers K-U, Xiangjun B, Määttänen M et al. Ice action on compliant structures: Laboratory indentation tests. Espoo: VTT Technical Research Centre of Finland, 2003. 125 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 2223).