Dissertations / Theses on the topic 'Navires à voiles'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 16 dissertations / theses for your research on the topic 'Navires à voiles.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
MAZZOUJI, FARID. "Contribution à l'étude des écoulements stationnaires et instationnaires autour des voiles de navires." Poitiers, 1992. http://www.theses.fr/1992POIT2266.
Full textVédrenne, Jérôme. "Simulation dynamique du comportement mécanique de navires, application à la propulsion éolienne." Nantes, 2010. http://castore.univ-nantes.fr/castore/GetOAIRef?idDoc=37741.
Full textWind driven ship performances have been assessed for more than thirty years by the mean of velocity prediction programs (VPP) that compute mechanical balance in a steady state. Progresses made using these tools have been significant but ship behaviour is indeed greatly unsteady, hence a dynamical approach is required to improve performance program capacities. This work examines the problem of ship dynamics and propose a method using a lagragian form of dynamic equations, non linear, in time domain and with multi body capacities. Forces on ship, and especially hydrodynamic and aerodynamic forces are calculated using mathematical models based on theoretical, experimental or numerical results. These models, based on the ones used for steady state performance calculation then extended for the need of dynamic simulation, are presented. The software organisation is also shown. Results coming from the software developed during this work are compared with full scale experimental results. Firstly for an electrical passenger ship, then for a racing yacht during a tacking manoeuvre. Obtained results show the validity of the proposed method. Finally, capacities of the dynamic tool are shown though the study of a small racing yacht
Huetz, Lionel. "Systematic study of the hydrodynamic behaviour of sailing yacht hulls using CFD and parametric design." Ecole centrale de Nantes, 2012. http://www.theses.fr/2012ECDN0020.
Full textUnlike most of engine powered ships, the performance of a sailing yacht cannot be predicted trough a sole hydrodynamic study. In fact, sailing yachts behaviour relies on the equilibrium between aerodynamic and hydrodynamic effects. A coupled modelling of those two elements is therefore required to characterize the yacht behaviour. A fully coupled simulation including the aerodynamic of the sails and topsides as well as the hydrodynamic of the wetted part of the hull is out of reach of current numerical tools. Velocity prediction programs remain essential. This type of program computes the equilibrium between aero and hydrodynamic forces to predict the yacht’s attitude and speed under given wind conditions. These forces are approximated using formulations, based on numerous results coming form experiments, simulations or empirical laws. The hydrodynamic models available nowadays for the design phase of the yacht are based on systematic series. Today’s hull shapes are far from the shapes used to build these series, leading to significant discrepancies between the predicted and the real performance of the yachts. After a detailed description of the existing formulations on the hydrodynamic behaviour of sailing yachts, this report presents a methodology to build new formulations. This method is based on new simulations results generated by an automated computational loop. The different tools used in the loop are described, from the generation of the hull shapes to their hydrodynamic evaluation using numerical simulation and the storage of the results in the database. A focus is made on the geometrical characterization of the hulls using hydrostatic computations. The methodology and the statistical tools used to build the formulations from the database are then described, with an emphasis on the variable selection process. Two systematic series are presented and analysed. The variables which have been selected as the most relevant to describe the physics involved are presented along with the formulations describing the forces and running attitudes of the hulls, depending on their shape and the external conditions. A benchmark of the presented formulations is finally provided. The case study of on an offshore racing monohull complying with the Volvo 70 rule is presented to evaluate the proposed methodology
Raymond, Jérémie. "Estimation des performances des voiliers au planing." Ecole Centrale de Nantes, 2009. http://www.theses.fr/2009ECDN0013.
Full textMarcil, Eileen Reid. "Shipbuilding at Quebec, 1763-1893 : the square rigger trade." Doctoral thesis, Université Laval, 1987. http://hdl.handle.net/20.500.11794/29231.
Full textRossi, Annabel. "La nature d'une saisie conservatoire de navire." Paris 1, 2004. http://www.theses.fr/2004PA010321.
Full textWANG, CHENGTIAN. "Routage des navires. Modele de routage de voiliers. Formalisation et optimisation par programmation dynamique." Paris 7, 1990. http://www.theses.fr/1990PA077169.
Full textPonizy, Barbara. "Calcul rapide de l'écoulement non symétrique autour de navires à l'aide de singularités de Kelvin ; application au cas des voiliers." Poitiers, 1996. http://www.theses.fr/1996POIT2300.
Full textOudompheng, Benoit. "Localisation et contribution de sources acoustiques de navire au passage par traitement d’antenne réduite." Thesis, Université Grenoble Alpes (ComUE), 2015. http://www.theses.fr/2015GREAT071/document.
Full textSince the surface ship radiated noise is the main contribution to the underwater acoustic noise in coastal waters, The Marine Framework Strategy Directive of the European Commission recommends the development of the monitoring and the reduction of the impact of the traffic noise. The need for developing an industrial system for the noise mapping of the surface ship have motivated this study, it will allow the naval industries to identify which part of the ship radiates the stronger noise level.In this context, this research work deals with the development of passive noise mapping methods of a surface ship passing-by above a static linear array with a reduced number of hydrophones. Two aspects of the noise mapping are considered: the localization of acoustic sources and the identification of the relative contribution of each source to the ship acoustic signature.First, a bibliographical study concerning the acoustic radiation of a passing-by surface ship is conducted in order to list the main acoustic sources and then to simulate representative ship sources. The acoustic propagation is simulated according to the ray theory and takes the source motion into account. The simulator of the acoustic radiation of a passing-by ship is built in order to validate the proposed noise mapping methods and to design an experimental set-up. A study about the influence of the source motion on the noise mapping methods led to the use of the beamforming method for moving sources for the source localization and a deconvolution method for the identification of the source contribution. The performances of both methods are assessed considering measurement noise and uncertainties about the propagation model in order to know their limitations. A first improvement of the beamforming method consists of a passive synthetic aperture array algorithm which benefits from the relative motion between the ship and the antenna in order to improve the spatial resolution at low frequencies. Then, an algorithm is proposed to acoustically correct the trajectography mismatches of a passing-by surface ship. Finally, the last part of this thesis concerns a pass-by experiment of a towed-ship model in a lake. These measurements allowed us to validate the proposed noise mapping methods and their proposed improvements, in a real and controlled environment
Du, Peng. "Numerical modeling and prediction of ship maneuvering and hydrodynamics during inland waterway transport." Thesis, Compiègne, 2018. http://www.theses.fr/2018COMP2459.
Full textIn this thesis, the ship hydrodynamics during inland waterway transport and ship maneuvering are investigated using CFD (Computational Fluid Dynamics) based onOpenFoam. Validation and verification studies are carried out for the mesh convergence, time step convergence, sensitivity to turbulence models and dynamic mesh techniques. A quaternion-based 6DoF motion solver is implemented for the trim and sinkage predictions. Environmental effects on several inland vessels (convoy 1, convoy 2, tanker) are studied using the validated numerical models. Three important aspects, the confinement effect of the waterway, head-on encounter and ship-bridge pile interaction are simulated. The testing conditions cover a wide range, including various channel dimensions, water depths, ship draughts and speeds. The ship resistance, wave pattern, Kelvin angle and wave elevation at specific positions are investigated as functions of these parameters. Ship maneuvering is investigated using virtual captive model tests based on the MMG (Mathematical Maneuvering Group) model. An actuator disk is implemented to replace the real propeller. Open water test, rudder force test, OTT (Oblique Towing Tank test) and CMT (Circular Motion Test) of a KVLCC2 model are carried out to obtain the hydrodynamic coefficients of the propeller, rudder and ship hull. Using the obtained coefficients, system-based maneuvering simulations are carried out and validated using the free running test data. These studies reproduce real ship tests and thus prove the validity of our numerical models. As a result, the numerical solver is promising in ship hydrodynamics and marine engineering simulations
Villéger, François. "Etude experimentale et theorique de l'ecoulement autour d'une derive isolee de voilier percant la surface libre a grand nombre de froude." Poitiers, 1987. http://www.theses.fr/1987POIT2204.
Full textLeclerc, Jean. "L'aménagement de la voie maritime du Saint-Laurent, en aval de Québec, 1805-1860." Master's thesis, Université Laval, 1989. http://hdl.handle.net/20.500.11794/17638.
Full textPhilip-Alliez, Camille. "Etude numérique et expérimentale de l'écoulement nasal chez les enfants présentant une obstruction nasale." Thesis, Aix-Marseille 1, 2011. http://www.theses.fr/2011AIX10140/document.
Full textOne of the essential data sought by the clinician in his diagnosis on the functionality of the nasal cavity. In some cases, this function is only partially approached by various measurement methods at its disposal. The prevalence of chronic nasal obstruction in the population (30% of the population) underlines the interest to orthodontists must wear respiratory disorders. The acquisition of a reliable diagnostic tool of nasal obstruction will allow for earlier treatment to guide the best craniofacial growth. The RAA can not be currently used as single diagnostic test, because its correlation with subjective assessments can remain low. The objective of this work is to provide a model for the diagnosis of nasal obstruction for all patients. In cases where the RAA does not allow a definite diagnosis of nasal obstruction, numerical simulations allow, after identifying the particular anatomical situations, to obtain a functional objective or not confirming the diagnosis of rheumatic fever. The methodology for this thesis consists of a complete resolution of the Navier-Stokes equations in geometries reconstructed in 3D, that is to say who received a digital processing to extract the contours and surface meshes and create volume. The development of objective measurement tools is a key issue in determining optimal treatment strategies and to evaluate treatment outcomes. Computer modeling of the dynamics of air flow within the nasal cavity from three-dimensional CT reconstructions may have clinical applications. One of its applications allow to visualize the flow postoperative virtually
Perrier, Amandine. "Le commerce maritime grec en Méditerranée orientale et en mer Noire aux Vème et IVème s. av. J.-C." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM3024.
Full textIn this present thesis concerning Greek Archaeology, I undertook to work on the organization of Greek maritime commerce in Eastern Mediterranean and Black Sea during the 5th and 4th century BC. I worked mostly on the trade's nature and intensity occurring in this part of the Mediteranean in this time. In order to carry out my work properly, I established a new catalog of greek shipwrecks, that I then confront with textual, epigraphic and archaeological sources. The careful study of the ship's cargo takes part in a better understanding of the commercial actors, trading network and above all of the importance of Athens at this time
Ji, Shengcheng. "Simulation 3D des ondes de batillage générées par le passage des bateaux et des processus associée de transport de sédiments." Thesis, Compiègne, 2013. http://www.theses.fr/2013COMP2068/document.
Full textShip-generated waves in restricted waterways lead to the stream banks erosion and cause environmental damage which harms fish, plants, benthos, plankton, etc. They also alter the channel morphology because of the resuspension and transport of bed material by accelerated flows caused by moving-ships. The magnitude of these waves depends mainly on the geometrical and kinematical parameters of the convoy.The objective of this study is to predict the relationship between these geometrical and kinematical parameters and the amplitude of ship-generated waves as well as the water plane drawdown. Numerical simulations are conducted by solving the 3-dimensional Navier-Stokes equations along with the k-ε model for turbulent processes. The results are compared firstly with the empirical models and secondly with experimental measurements performed by the French Compagnie Nationale of Rhône (CNR). The exitance of the propeller increases the sediment in suspension. Therefore, the relationships between the re-suspended sediments and the advancing speeds of the convoy, the wakes generated by the moving convoy, as well as the number of barges are studied by adding 3D advection-diffusion equation and a propeller model
Dugois, Kévin. "Simulation à l’échelle microscopique et analyse macroscopique de l’imprégnation d’un matériau composite par un fluide chargé en particules." Thesis, Bordeaux, 2017. http://www.theses.fr/2017BORD0011/document.
Full textIn order to improve thermo-mechanical behavior of tubine blades in SAFRAN engines plane, a new composite material is necessary. The manufacturing process to obtain this composite is intricate and requires a two steps fluid densification process. This thesis focuses on numerical simulation of the first one called Slurry Cats/APS. In this step, suspended particles are introducted and captured in the reinforcement. For that purpose,we carry out a model at fiber scale, using Navier-Stokes equations in incompressible and monophasic formulation, Phillips equations [Phillips et al., 1992] and a rheological law [Krieger, 1972]. After validation step consisting in a comparison of computational results with experiments [Hampton et al., 1997] and theorical law [Belfort et al., 1994], this model has been used to simulate flow around geometries similar to those encountered in our composite material