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- W2891857137 abstract "With the opening of more Arctic shipping routes, the motivation to design safe andefficient ice-going ships has increased. Recently, knowledge of ship-ice interactionsand the mechanics of icebreaking processes has improved through numerous fullscalestudies; however, the understanding of precise ice-induced pressures and loadheights requires refinement to improve design methods. This thesis aims to further the development of an inverse engineering method todetermine the nature of ice loads experienced by ships. The method uses full-scalestrain measurements to estimate local pressures on the ship’s structures. The datastudied in this thesis was collected on the oblique icebreaker Baltika while operatingin the Russian Arctic over a two-year period. The inverse method uses an influence coefficient matrix to relate the measured strainto the input pressure load. Using FEM, strain response functions are fitted at eachsensor to generate the terms of the influence coefficient matrix. An optimisationroutine is used to solve the inverse force-strain relationship and predict the loadpatch shape and pressure induced by the ice impact. The hourly maximum strain measurements are identified and analysed to estimatethe applied load and contact area during ice impact events. A general analysis of250 significant impact events reveals that the applied pressure is on the order of10-25 MPa and the load height is on the order of 1-3 cm. The detailed analysis of 98individual impact events demonstrates that the load height during impact remainsmarkedly constant for the duration of the contact. Furthermore, the pressure distributionbetween load carrying structures is investigated. Based on the results, thepressure distribution between structural members is random and independent of thesupporting structure." @default.
- W2891857137 created "2018-09-27" @default.
- W2891857137 creator A5039726487 @default.
- W2891857137 date "2018-08-20" @default.
- W2891857137 modified "2023-09-24" @default.
- W2891857137 title "Application of an extended inverse method for the determination of ice-induced loads on ships" @default.
- W2891857137 hasPublicationYear "2018" @default.
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