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Development of simplified formulas to determine wave induced loads on inland vessels operated in stretches of water within the range of navigation IN(0.6 ≤ x ≤ 2)

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Matheus Torres, Gian Carlo ULiège
Promotor(s) : Taczala, Maciej ; Nzengu, Wa Nzengu
Date of defense : 2017 • Permalink : http://hdl.handle.net/2268.2/4421
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Title : Development of simplified formulas to determine wave induced loads on inland vessels operated in stretches of water within the range of navigation IN(0.6 ≤ x ≤ 2)
Author : Matheus Torres, Gian Carlo ULiège
Date of defense  : 2017
Advisor(s) : Taczala, Maciej 
Nzengu, Wa Nzengu 
Committee's member(s) : Bronsart, Robert 
Language : English
Number of pages : 137
Keywords : [en] Inland Navigation, Seakeeping, Bending Moment, Potential Flow, Rule-formulas, Linear Analysis, RAO, Long-term value, Statistics, Regression
Discipline(s) : Engineering, computing & technology > Civil engineering
Target public : Researchers
Professionals of domain
Student
Institution(s) : Université de Liège, Liège, Belgique
Degree: Master de spécialisation en construction navale
Faculty: Master thesis of the Faculté des Sciences appliquées

Abstract

[en] It is of major importance for design purposes that long-term effects coming from the sea are accurately predicted by classification societies, which must not be exceeded during the lifetime operation of a given vessel. It is encountered that Inland-Navigation Bureau Veritas rules (NR247) do not assess the seakeeping behaviour and do not predict sea loads adequately. To deal with this, a development of empirical-formulas was carried to account for inland-vessel responses when operated in stretches of water within the range of navigation of 0.6 m ≤ Hs ≤ 2 m, based on linear potential-flow theory, boundary element method and the 3D linear panel method theory. A frequency-domain linear analysis for an impossed constant speed of 10 knots is taken into account. Using the Belgian Coastal Scatter Diagram, it was found the hydrodynamic long-term response for a return period of 17 years, composed of motions, accelerations, relative elevation, shear forces and bending moments; encountered in a set of 46 inland vessels. Then, by mean of a regression process, a set of empirical equations was proposed accounting for these effects. They were validated against an additional set of 13 direct-calculation results, showing good agreement. Finally, to take into account discrepancies originated from lineartheory assumptions, proposed empirical models are corrected by taking into account nonlinear hydrodynamic effects.


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  • Matheus Torres, Gian Carlo ULiège Université de Liège - ULiège >

Promotor(s)

Committee's member(s)

  • Bronsart, Robert
  • Total number of views 34
  • Total number of downloads 296










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