Sensor network for dynamic ice-force identification

The Hanko-1 channel marker case study

Conference paper (2015)

Authors

Torodd S. Nord The University Centre in Svalbard, Norwegian University of Science and Technology (NTNU)
O. Øiseth Norwegian University of Science and Technology (NTNU)
O.W. Petersen Norwegian University of Science and Technology (NTNU)
E. Lourens Offshore Engineering - CEG
Research Group
Applied Mechanics (CEG) (TU Delft)
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Published Date

2015

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Applied Mechanics

Abstract

A measurement campaign at the Hanko-1 channel marker in the Gulf of Finland is planned in order to monitor the forces leading to ice-induced vibrations by means of force identification. It is planned to identify the ice forces using a joint input-state estimation algorithm in conjunction with a modally reduced order model. The methodology is presented together with a finite element model and a detailed analysis that determines the optimal sensor network. The novel approach used to determine the optimal response measurement types and locations ensures the identifiability of the dynamic ice forces from only a limited number of sensors and a selection of vibration modes. The optimal sensor locations are discussed in view of specific challenges posed by the arctic environment.
INTRODUCTION

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