Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Lagrangian Point"”.
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Investigation of a Lagrangian-point Propellant Depot Rendezvous Approach for an Interplanetary Mission to Mars
… depot is located at the <em> L</em><sub>2</sub> -Lagrangian point within the Earth-Moon system. This investigation determines if a refueling mission will reduce propulsive energy requirements necessary for Earth departure of a BEO-vehicle to achieve an interplanetary transfer to Mars. Furthermore, …
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Modélisation de problèmes hydroélastiques par éléments finis. Application aux lanceurs aérospatiaux
… generalizing Tong's one by a logical step in a lagrangian point of view. A specialized solution algorithm is presented. As launchers are axisymmetric structures, a general theory of axisymmetric structures with cosinusoidal modes is presented, including shells, volumes, and incompressible …
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Self Balanced Bare Electrodynamic Tethers. Space Debris Mitigation and other Applications
… the problem, from both electrical and dynamical points of view. All the previous considerations will lead to the introduction of control laws based on the SBET concept, enhancing its capabilities. These analysis will be tested in a couple of particular scenarios of interest. Mitigation of space …
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Bulle-Effect and its implications for morphodynamics of river diversions
… Navier-Stokes solver Nek5000, on which a Lagrangian point particle submodel was developed and implemented to model the transport of sediment. The simulations were computationally very expensive (∼ 240 million computational points), thus they required the use of the peta-scale supercomputer …
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Aplicaciones de la hidrodinámica suavizada de las partículas al estudio de fenómenos hidráulicos
… reduce plazos y costes. Los modelos Lagrangianos, o de Partículas y en concreto SPH, han permitido abordar estudios muy complejos en diferentes ramas de la ingeniería. En esta tesis se trata de comprobar la aplicabilidad del método SPH al diseño de estructuras hidráulicas. El camino …
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Wind loading and dynamic response of air-supported roof structures
… inviscid, compressible fluid is described from a Lagrangian point of view. Although only the simplest axisymmetric case is considered, the amount of computing is enormous, hence the procedure cannot, at present, be advocated for use in practice. In Chapter 12 the added mass effect due to vibrating …
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Low-Thrust Optimal Escape Trajectories from Lagrangian Points and Quasi-Periodic Orbits in a High-Fidelity Model
L'abstract è presente nell'allegato / the abstract is in the attachment
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Dynamical System Representation and Analysis of Unsteady Flow and Fluid-Structure Interactions
… stability. In the first chapter, I present a new Lagrangian function to derive the equations of motion of unsteady point vortices. This representation is a reconciliation between Newtonian and Lagrangian mechanics yielding a new approach to model the dynamics of these vortices. In the second …