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Faculté des Sciences appliquées
Faculté des Sciences appliquées
MASTER THESIS
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Master thesis : Study on the Vibration of Corrugated Cargo Tank Bulkheads

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De Oliveira Antonio, Victor José ULiège
Promotor(s) : Mumm, Holger
Date of defense : 15-Sep-2022 • Permalink : http://hdl.handle.net/2268.2/16049
Details
Title : Master thesis : Study on the Vibration of Corrugated Cargo Tank Bulkheads
Author : De Oliveira Antonio, Victor José ULiège
Date of defense  : 15-Sep-2022
Advisor(s) : Mumm, Holger 
Committee's member(s) : Kaeding, Patrick 
Taczala, Maciej 
Language : English
Number of pages : 86
Keywords : [en] Vibration
[en] Corrugated
[en] Bulkhead
[en] Fatigue
Discipline(s) : Engineering, computing & technology > Mechanical engineering
Target public : Professionals of domain
Institution(s) : Université de Liège, Liège, Belgique
Universität Rostock, Rostock, Allemagne
Degree: Master : ingénieur civil mécanicien, à finalité spécialisée en "Advanced Ship Design"
Faculty: Master thesis of the Faculté des Sciences appliquées

Abstract

[en] Cargo tankers corrugated bulkheads are constantly subjected to excited vibration due
to propulsion system components, such as engines, shafts and gear boxes, and severe
vibration can be observed if the bulkheads vibrate in resonance with the excitation frequency.
Added to it, the influence of the cargo density and the filling level at the cargo tank can lead
to a considerable variation of the natural frequencies, shifting them closer to the excitation
frequency and leading the system to a dangerous resonance state.
In addition, vibration induced by the propulsion system is known for an extremely
high number of load cycles in a short period of time. In a state of resonance, the effects of
such cycles combined with huge amplitudes may negatively affect the design fatigue life,
leading to fatigue induced cracks.
In the course of this study, two main questions are supposed to be answered. First,
how to design a proper corrugated cargo tank bulkhead in order to minimise resonance risks
due to the excitation frequencies generated by the propulsion system? And second, to assess
at which vibration levels fatigue damage is likely to occur. For that purpose, a parametric
Finite Elements model is developed in order to analyze how the natural frequencies vary
according to the variation of dimension parameters, cargo filling levels and cargo densities.
In addition, the model is refined at the stress concentration areas for a fatigue strength
analysis in order to determine the vibration levels and the stress range for which the fatigue
damage is likely to occur.


File(s)

Document(s)

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Access Master_Thesis__URO_DNV__internal_version.pdf
Description: Thesis, full report
Size: 12.32 MB
Format: Adobe PDF
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Access Master_Thesis__URO_DNV__executive_summary.pdf
Description: Thesis, executive summary
Size: 2.54 MB
Format: Adobe PDF

Author

  • De Oliveira Antonio, Victor José ULiège Université de Liège > Master ing. civ. méc. (EMSHIP+)

Promotor(s)

Committee's member(s)

  • Kaeding, Patrick UNI Rostock
  • Taczala, Maciej Zut
  • Total number of views 15
  • Total number of downloads 44










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