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/ReportReport

    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

    SeriesVTT Tiedotteita - Meddelanden - Research Notes
    Number2223
    ISSN1235-0605

    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).
    @book{ed46474346ae40dfa88a4f85027e2165,
    title = "Ice action on compliant structures: Laboratory indentation tests",
    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.",
    keywords = "marine structures, offshore structures, steady-state vibrations, ice-induced vibrations, conical structures, dynamic response, measurement, testing, numerical analysis, models",
    author = "Tuomo K{\"a}rn{\"a} and Kari Kolari and Peter Jochmann and Karl-Ulrich Evers and Bi Xiangjun and Mauri M{\"a}{\"a}tt{\"a}nen and Petter Martonen",
    year = "2003",
    language = "English",
    isbn = "951-38-6200-3",
    series = "VTT Tiedotteita - Meddelanden - Research Notes",
    publisher = "VTT Technical Research Centre of Finland",
    number = "2223",
    address = "Finland",

    }

    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/ReportReport

    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

    Y1 - 2003

    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 - Meddelanden - 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).