000013564 001__ 13564
000013564 005__ 20161114165846.0
000013564 04107 $$aeng
000013564 046__ $$k2011-05-25
000013564 100__ $$aHendrikse, H.
000013564 24500 $$aIce Induced Vibrations of Flexible Offshore Structures: Comparison and Sensitivity Analysis of Existing Phenomenological Models

000013564 24630 $$n3.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013564 260__ $$bNational Technical University of Athens, 2011
000013564 506__ $$arestricted
000013564 520__ $$2eng$$aOccasionally vertically-sided offshore structures experience sustained vibration due to drifting ice sheets crushing against them. These vibrations, more commonly known as Ice Induced Vibrations (IIV), may lead to fatigue problems, safety issues and uncomfortable working conditions. To date only phenomenological models exist of ice failure in the course of IIV which are capable of predicting the onset and severity of these vibrations. This is a consequence of the complexity of the ice crushing process that takes place in the course of IIV. This process is not understood well enough yet to enable development of practically applicable models of this phenomenon based on the principles of fracture mechanics. In this study various existing phenomenological models of IIV, with a focus on the models presented in [1] and [2], are taken for comparison in an attempt to identify their main differences and similarities. The comparison is based on: (i) The adopted mechanism enabling the model to predict the occurrence of synchronization; (ii) The aspects of the ice-structure interaction taken into account; (iii) Accuracy of the model predictions when compared to real measurements. A sensitivity analysis is made with respect to the most critical model parameters for each of the models taken into consideration. Taking into account the available scientific knowledge about these critical parameters and the possible ways of quantifying them, an assessment is made of the general applicability of the compared models for the prediction of IIV. Results of the comparison and sensitivity analysis will lead to an overview of the state of the art considering phenomenological models for IIV. Also the potential of each model with respect to prediction of the occurrence of synchronization in the case of ice-structure interaction is reflected upon. Using the obtained results a recommendation is made for the future development of the investigated phenomenological models with the aim of working towards development of a more practically applicable fracture mechanics based model.

000013564 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013564 653__ $$a

000013564 7112_ $$aCOMPDYN 2011 - 3rd International Thematic Conference$$cIsland of Corfu (GR)$$d2011-05-25 / 2011-05-28$$gCOMPDYN2011
000013564 720__ $$aHendrikse, H.$$iMetrikine, A.
000013564 8560_ $$ffischerc@itam.cas.cz
000013564 8564_ $$s9901$$uhttps://invenio.itam.cas.cz/record/13564/files/289.pdf$$yOriginal version of the author's contribution as presented on CD, section: MS 30 The Synchronization Phenomenon in Modern Structural Dynamics: Wind, Flow, Ice and Pedestrian - Induced Vibrations of Structures.
000013564 962__ $$r13401
000013564 980__ $$aPAPER