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ORBi Open Repository and Bibliography (298.599 recursos)

In may 2007, the ULg's Administrative Board (joined in June 2007 by the FUSAGx) decided to create an institutional repository and defined a strong institutional self-archiving policy to increase the visibility, accessibility and impact of the University's publications (Board's decision). This decision led to the official launch, in November 2008, of the ORBi platform including both the Academic Bibliography and the Institutional Repository of the Wallonia-Europe University Academy.

Engineering, computing & technology => Aerospace & aeronautics engineering

Mostrando recursos 1 - 20 de 27

  1. A Modal Frequency-Domain Generalised Force Matrix for the Unsteady Vortex Lattice Method

    Dimitriadis, Grigorios; Giannelis, N. F.; Vio, G. A.
    Peer reviewed

  2. Fatigue resistant designs using stress-based topology optimization

    Collet, Maxime; Bauduin, Simon; Fernandez Sanchez, Eduardo Felipe; Duysinx, Pierre
    Fatigue is an important mode of failure in mechanical engineering and accounting for it as soon as the early stage of design using topology optimization sounds primordial. Structures undergoing high-cycle fatigue can be described by the stress-based approach and then a stress-based topology optimization framework, which has received great interest since almost 20 years because of the innovative designs that can be achieved to answer strength requirements, can be used. Literature reports many good results for shape optimization [Mrzyglod & Zielinsky(2006)] whereas in the eld of topology optimization several authors have shown that considering fatigue in an optimization framework leads to more relevant solutions where fluctuating loads are...

  3. Topology optimization of mechanical components fabricated by additive manufacturing for a Shell Eco Marathon vehicle

    Alarcon Soto, Pablo
    Since 2004, a team of students and researchers of University of Liege takes part to the Shell Eco Marathon race with a lightweight electric vehicle. The goal of this pedagogical project is to design, fabricate and operate a vehicle exhibiting the least energy consumption. A key factor to reduce the energy consumption is to minimize the vehicle mass. Besides the body structure made of CRFP, engineers have also to focus on the weight reduction of any mechanical parts of the powertrain, transmission and of rolling gear. The combination of topology optimization with additive manufacturing techniques allows to propose innovative designs exhibiting...

  4. Fatigue resistant designs using stress-based topology optimization

    Collet, Maxime; Bauduin, Simon; Fernandez Sanchez, Eduardo Felipe; Duysinx, Pierre
    Stress based topology optimization has received great interest since almost 20 years because of the innovative designs that can be achieved to answer strength requirements. Fatigue is an important mode of failure in mechanical engineering and accounting for it as soon as the early stage of design using topology optimization sounds primordial. Literature reports many good results for shape optimization [Mrzyglod & Zielinsky(2006)] whereas in the field of topology optimization several authors have shown that considering fatigue in an optimization framework leads to more relevant solutions where fluctuating loads are involved [Holmberg E.(2015), Collet et al(2016), Svärd(2015)]. In order to check...

  5. Feasibility study of a UV photometer on-board a 3 CubeSat for the study of bright massive stars

    Desselle, Richard; Kintziger, Christian; Rauw, Grégor; Rochus, Pierre
    Following the amazing progresses in miniaturizing essential components of spacecraft, the last decade has witnessed an important development of nano- and micro-satellites. Beyond the mere technological experiment, these small satellites are now considered as important complements of much larger and more sophisticated probes to do scientific research. In this context we are conducting a feasibility study of a UV photometer on-board a 3U CubeSat. The scientific purpose of this payload will be to collect time series of photometric measurements of bright massive stars. These massive stars are very hot and luminous objects emitting copious amounts of UV radiation. The properties of...

  6. Feasibility study of a UV Photometer on-board a 3U Cubesat for the study of bright massive stars

    Desselle, Richard
    Feasibility study of a UV Photometer on-board a 3U Cubesat for the study of bright massive stars

  7. Experimental and numerical investigation of the nonlinear dynamics of compliant mechanisms for deployable structures

    Dewalque, Florence; Schwartz, Cédric; Denoël, Vincent; Croisier, Jean-Louis; FORTHOMME, Bénédicte; Bruls, Olivier
    Peer reviewed

  8. Experimental and numerical investigation of the nonlinear dynamics of compliant mechanisms for deployable structures

    Dewalque, Florence; Schwartz, Cédric; Denoël, Vincent; Croisier, Jean-Louis; FORTHOMME, Bénédicte; Bruls, Olivier
    Peer reviewed

  9. Numerical and Experimental Study of Bluff Body Aerodynamics

    Guissart, Amandine
    This thesis investigates the dynamics of detached flows around bluff bodies and the resulting aerodynamic loads, which are of primary importance in wind engineering. Two canonical geometries are considered: a 4:1 rectangular cylinder and a flat plate that is either fixed at large incidence or undergoing a large pitching motion. The different studies are conducted through both experimental measurements and numerical simulations. Their results are compared by using Proper Orthogonal Decomposition and Dynamic Mode Decomposition. The flow around the 4:1 rectangular cylinder is studied through dynamic pressure measurements along a cross-section combined with Unsteady Reynolds-Averaged Navier-Stokes (RANS) and Delayed-Detached Eddy Simulation (DDES) results. The main...

  10. Nonlinear analysis of compliant deployable structures: modelling, simulation and experimental validation

    Dewalque, Florence
    Compliant mechanisms are flexible components which can store elastic energy when deformed and then passively release it to produce a motion. Their scope of applications encompasses various domains from robotic orthoses to microscopes and grippers. In this work, the developments focus on compliant mechanisms called tape springs used in deployable space structures. Tape springs, due to their autonomous deployment capacity from a compact folded configuration, their high stiffness in the deployed equilibrium state and their simplicity of integration, represent efficient alternatives to common motorised hinges for space applications. Thus, they are currently used to deploy appendices on satellites such as solar...

  11. Nonlinear analysis of compliant deployable structures: modelling, simulation and experimental validation

    Dewalque, Florence
    Compliant mechanisms are flexible components which can store elastic energy when deformed and then passively release it to produce a motion. Their scope of applications encompasses various domains from robotic orthoses to microscopes and grippers. In this work, the developments focus on compliant mechanisms called tape springs used in deployable space structures. Tape springs, due to their autonomous deployment capacity from a compact folded configuration, their high stiffness in the deployed equilibrium state and their simplicity of integration, represent efficient alternatives to common motorised hinges for space applications. Thus, they are currently used to deploy appendices on satellites such as solar...

  12. Nonlinear analysis of compliant deployable structures: modelling, simulation and experimental validation

    Dewalque, Florence
    Compliant mechanisms are flexible components which can store elastic energy when deformed and then passively release it to produce a motion. Their scope of applications encompasses various domains from robotic orthoses to microscopes and grippers. In this work, the developments focus on compliant mechanisms called tape springs used in deployable space structures. Tape springs, due to their autonomous deployment capacity from a compact folded configuration, their high stiffness in the deployed equilibrium state and their simplicity of integration, represent efficient alternatives to common motorised hinges for space applications. Thus, they are currently used to deploy appendices on satellites such as solar...

  13. System Eigenvalue Identification Of Mistuned Bladed Disks Using Least-Squares Complex Frequency-Domain Method

    Huang, Yuan; Kielb, Robert E.; Li, Jing; Dimitriadis, Grigorios
    Peer reviewed

  14. Assessment of the fluid-structure interaction capabilities for aeronautical applications of the open-source solver SU2.

    Sanchez, Ruben; Kline, Heather; Thomas, David; Variyar, Anil; Righi, Marcello; Economon, Thomas; Alonso, Juan; Palacios, Rafael; Dimitriadis, Grigorios; Terrapon, Vincent
    Peer reviewed

  15. Robust mission design using invariant manifolds

    Dell'Elce, Lamberto; Baresi, Nicola; Kerschen, Gaëtan; Scheeres, Daniel J.
    Uncertainties in the dynamical system affect all real-life applications in astrodynamics. This is particularly true for satellites orbiting about small bodies owing to their irregular shapes and to the difficulties in characterizing their physical properties at the early stages of a dedicated spacecraft mission. Hence, accommodating uncertainty in the orbital design process may be extremely beneficial for the success of the mission. Here, in a Lyapunov stability perspective, the properties of the invariant manifolds are exploited to generate regions of the phase space where the motion is guaranteed to evolve despite the uncertainties in the system parameters and navigation errors....

  16. Influence of the inter‐stage coupling flexibility on the dynamics of multi‐stage rotors

    Nyssen, Florence; Golinval, Jean-Claude
    Peer reviewed

  17. Experimental Modal Identification of Mistuning in an Academic Blisk and Comparison With The Blades Geometry Variations

    Nyssen, Florence; Arnst, Maarten; Golinval, Jean-Claude
    Peer reviewed

  18. Experimental Modal Identification of Mistuning in an Academic Blisk and Comparison With The Blades Geometry Variations

    Nyssen, Florence; Arnst, Maarten; Golinval, Jean-Claude
    Peer reviewed

  19. Study of Dynamic Impact Behaviors and Ballistic Properties of Hybrid Composites

    Guo, Yingnan; Sun, Qin; Wu, Ling
    Peer reviewed

  20. Difusion des inconnues hyperstatiques dans les voilures à longerons couplés

    Fraeijs de Veubeke, Baudouin
    This paper contains a first set of applications of the variational principles of elasticity to aeronautical structures.

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