Master Thesis Online
Study of the seakeeping non-linearities through the weak-scatterer approximation of the potential flow theory
Sudhanshu 
Promotor(s) : Gentaz, Lionel
Date of defense : 13-Sep-2021 • Permalink : http://hdl.handle.net/2268.2/13169
Details
| Title : | Study of the seakeeping non-linearities through the weak-scatterer approximation of the potential flow theory |
| Translated title : | [en] Study of the seakeeping non-linearities through the weak-scatterer approximation of the potential flow theory |
| Author : | Sudhanshu
|
| Date of defense : | 13-Sep-2021 |
| Advisor(s) : | Gentaz, Lionel |
| Committee's member(s) : | Bonnefoy, Félicien
Leroy, Vincent |
| Language : | English |
| Number of pages : | 60 |
| Keywords : | [en] Nonlinear potential flow solver [en] Weakly Scatterer [en] Seakeeping of Ships and Offshore structures [en] benchmarking [en] CN_WSC [en] fluid mechanics |
| Discipline(s) : | Engineering, computing & technology > Mechanical engineering |
| Research unit : | Laboratoire de recherche en Hydrodynamique, Énergétique et Environnement Atmosphérique |
| Target public : | Researchers Professionals of domain Student General public Other |
| Institution(s) : | Université de Liège, Liège, Belgique Ecole Centrale de Nantes / Laboratoire de recherche en Hydrodynamique, Énergétique et Environnement Atmosphérique, Nantes |
| Degree: | Master : ingénieur civil mécanicien, à finalité spécialisée en "Advanced Ship Design" |
| Faculty: | Master thesis of the Faculté des Sciences appliquées |
Abstract
[en] In the framework of the completion of EMShip (Erasmus Mundus Double Master in Ship Design and Offshore Structures) Program, this master thesis was undertaken at LHEEA (Laboratory in Hydrodynamics, Energetics and Atmospheric Environment), a CNRS/Ecole Centrale Nantes research laboratory.
The purpose of this thesis is the estimation of the non-linearities associated with sea-keeping computation encountered in highly cambered waves. Linear methods like NEMOH developed for small displacements computations do not give good result. To estimate nonlinearity the weakly-nonlinear seakeeping code known as CN-WSC (Weak-Scatterer) was developed.
To quantify the non-linearities associated with highly cambered waves, a vertical cylinder was taken and it's motion response are calculated with CN-WSC (Weak-Scatterer) and similar calculations are done with linear code NEMOH. The motions calculated with both methods are compared and differences in the motion for highly cambered waves are illustrated as non-linearities were studied.
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Sudhanshu_LHEEA_ECN.pdf
Description: Study of the seakeeping non-linearities through the weak-scatterer approximation of the potential flow theory
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