Session: 07-05-01 Ice Model Tests

Paper Number: 78507

78507 - Ice Basin Tests for Ice-Induced Vibrations of Offshore Structures in the SHIVER Project 

With the recent surge in development of offshore wind in the Baltic Sea, Bohai Sea and other ice-prone regions, a need has arisen for new basin tests to qualify the interaction between offshore wind turbines and sea ice. A series of model tests was performed at the Aalto ice basin as part of the SHIVER project. The tests were aimed at modeling the dynamic interaction between flexible, vertically-sided structures and ice failing in crushing. A real-time hybrid test setup was used to represent the structure. This novel test setup enabled the testing of a wide range of structure types, including existing full-scale structures for which ice-induced vibrations have been documented, and a series of single-degree-of-freedom oscillators to obtain a better understanding of the fundamental processes during dynamic ice-structure interaction. The tests were primarily focused on the dynamic behavior of monopile foundations for offshore wind turbines under ice crushing loads. In this paper we provide a description of the execution of the test campaign with a focus on 1) the development of crushing model-ice during the campaign, 2) the performance of the real-time hybrid test setup and 3) the scaling approach used for the tests. Results of the applied scaling approach for a simulated Norströmsgrund lighthouse and Molikpaq platform are discussed in detail. The benchmark dataset of this SHIVER test campaign provides a statistical foundation for further validation of design calculations and models.

Presenting Author: Hayo Hendrikse TU Delft

Authors:

Hayo Hendrikse TU Delft
Tim Hammer TU Delft
Cody Owen TU Delft
Marnix Van Den Berg TU Delft
Kees Van Beek TU Delft
Arttu Polojärvi Aalto University
Otto Puolakka Aalto University
Tom Willems Siemens Gamesa