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Development of a floe-ice breaking simulation for the generation of propeller–ice load spectra
Citation Link: https://doi.org/10.15480/882.8574
Other Titles
Entwicklung einer Simulation für das Brechen von Eisschollen zum Erstellen eines Propeller-Eislast Spektrums
Publikationstyp
Master Thesis
Date Issued
2023-08-16
Sprache
English
Author(s)
Sapp, Lina
Title Granting Institution
Technische Universität Hamburg
Examination Date
2023-08-30
TORE-DOI
Citation
Technische Universität Hamburg (2023)
Within the scope of this work, an icebreaking simulation for floe ice is developed and implemented. The existing failure descriptions of local failure by bending and global failure by cracking as well as failure by direct rotation are extended by a newly described local failure by cracking. This combines the failure initiation of cracking with the fracture pattern of failure by bending. The simulation is validated for both the fracture forces at the bow and the generated breaking pattern by comparison with observations. Furthermore, the impact of different simulative as well as physical parameters on the model is investigated by a parameter study.
The simulation can be applied to arbitrary ice floe fields in combination, in conjunction with the bow contour of different icebreaking vessels, to calculate the breaking pattern including the ice fragments that migrate under the bow. In this work, the PSRV S.A. Agulhas is primarily used, with additional comparative simulations for the RV Polarstern. Additionally, an algorithm is developed and applied to generate load and torque spectra based on the computed ice cusps from the icebreaking simulation. Finally, the generated torque spectrum is compared with field measurement data.
The simulation can be applied to arbitrary ice floe fields in combination, in conjunction with the bow contour of different icebreaking vessels, to calculate the breaking pattern including the ice fragments that migrate under the bow. In this work, the PSRV S.A. Agulhas is primarily used, with additional comparative simulations for the RV Polarstern. Additionally, an algorithm is developed and applied to generate load and torque spectra based on the computed ice cusps from the icebreaking simulation. Finally, the generated torque spectrum is compared with field measurement data.
Subjects
ice floes
propeller ice interaction
simulation
ice load
ice breaking
floe ice
DDC Class
620: Engineering
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Development_of_a_Floe-Ice_Breaking_Simulation_for_the_Generation_of_Propeller-Ice_Load_Spectra.pdf
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