Print Email Facebook Twitter The influence of level ice on the frequency domain response of floaters Title The influence of level ice on the frequency domain response of floaters Author Keijdener, C. (TU Delft Offshore Engineering; Norwegian University of Science and Technology (NTNU)) de Oliveira Barbosa, J.M. (TU Delft Dynamics of Structures) Metrikine, A. (TU Delft Offshore Engineering; TU Delft Engineering Structures; Norwegian University of Science and Technology (NTNU)) Department Engineering Structures Date 2017-11-01 Abstract In this paper the effect of a nearby, semi-infinite, level ice sheet on the frequency domain response of a thin, floating, rigid body is studied using a 2D model. The ice is modeled using a dynamic Euler-Bernoulli beam and the finite depth water layer is described with the Laplace equation and the linearized Bernoulli equation. Eigenfunction matching is used to resolve the interface between the ice covered and open water regions. The body is excited by external loads, generating waves. The waves are partially reflected by the ice edge and these reflected waves influence the body's response. It is this influence that this paper focuses on. Below a certain onset frequency the amplitude of the reflected waves is insignificant and consequently the body remains unaffected by the ice. This frequency is only sensitive to the ice thickness with thinner ice resulting in a higher onset frequency. Above the onset frequency the reflected waves cause quasi-standing waves between body and ice. For frequencies at which half the wavelength of the surface wave in the water is approximately an integer multiple of the gap length, the amplitude of the standing waves is greatly amplified. This can result in (anti-)resonance depending on the phasing between the reflected waves and the body's motion. Subject Frequency domain responseHydrodynamicsIce-floater interactionLevel ice To reference this document use: http://resolver.tudelft.nl/uuid:3386dde5-8da0-4531-9178-bd1eb738d54e DOI https://doi.org/10.1016/j.coldregions.2017.09.004 Embargo date 2019-09-21 ISSN 0165-232X Source Cold Regions Science and Technology, 143, 112-125 Part of collection Institutional Repository Document type journal article Rights © 2017 C. Keijdener, J.M. de Oliveira Barbosa, A. Metrikine Files PDF p5_HD_effect_on_barge.pdf 1009.31 KB Close viewer /islandora/object/uuid:3386dde5-8da0-4531-9178-bd1eb738d54e/datastream/OBJ/view