Abstract
This paper presents the transient wave packet (TWP) technique as an efficient method for wave–ice interaction experiments. TWPs are deterministic wave groups, where both the amplitude spectrum and the associated phases are tailor-made and manipulated, being well established for efficient wave–structure interaction experiments. One major benefit of TWPs is the possibility to determine the response amplitude operator (RAO) of a structure in a single test run compared to the classical approach by investigating regular waves of different wave lengths. Thus, applying TWPs for wave–ice interaction offers the determination of the RAO of the ice at specific locations. In this context, the determination of RAO means that the ice characteristics in terms of wave damping over a wide frequency range are obtained. Besides this, the wave dispersion of the underlying wave components of the TWP can be additionally investigated between the specific locations with the same single test run. For the purpose of this study, experiments in an ice tank, capable of generating tailored waves, were performed with a solid ice sheet. Besides the generation of one TWP, regular waves of different wave lengths were generated as a reference to validate the TWP results for specific wave periods. It is shown that the TWP technique is not only applicable for wave–ice interaction investigations, but is also an efficient alternative to investigations with regular waves.
Highlights
The aim of the present study was to explore the possibilities of the transient wave packet (TWP) concept for wave–ice interaction experiments while ensuring that the ice sheet does not break
The different spectra already show a significant advantage of TWPs, as the clearly defined and smooth spectrum allows easy comparison of the different positions
This paper introduced the TWP technique as an efficient method for wave–ice interaction experiments
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. The interaction of ice and waves is a very complex process involving ice mechanics and wave theory. The influencing parameters are the ice type, size, thickness, distribution and ice covered area as well as mechanical properties of the ice. The ice field affects the incoming waves and the waves have a strong influence on the ice field. The waves displace and may break the ice while the ice causes a change in wave properties due to its flexural deformation as well as attenuation of waves due to scattering, damping and frictional effects
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