Examinando por Materia "Mechanics"

Mostrando 1 - 5 de 5
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    Ítem
    Analysis of vibrations in a plate using interferometric methods
    (SPIE, 2004-10-21) Ángel-Toro, Luciano; Prieto, Daniel Velasquez; Rueda Muñóz, Edgar Alberto; Universidad EAFIT. Departamento de Ciencias Básicas; Óptica Aplicada
    In this work some frequencies and modes of vibration of a thin plate were determined using interferometric methods like: real-time holographic interferometry, time-average holographic interferometry, digital speckle pattern interferometry DSPI. And the results obtained are compared with those obtained with the program of finite elements COSMOS.
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    Ítem
    Diseño y construcción de un vehículo utilitario todoterreno
    (Universidad EAFIT, 2007) Blandón Rincón, Jhon Alexander; Rico Mora, Juan Pablo; Barbosa Pérez, Jaime Leonardo
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    Ítem
    Modeling and simulation of an Underwater Remotely Operated Vehicle (ROV) for surveillance and inspection of port facilities using CFD tools
    (2008-01-01) Valencia, R.A.; Ramírez, J.A.; Gutiérrez, L.B.; García, M.J.; Valencia, R.A.; Ramírez, J.A.; Gutiérrez, L.B.; García, M.J.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecánica Aplicada
    This article presents theoretical and computational studies with Computational Fluids Dynamics (CFD) tools of an Underwater Remotely Operated Vehicle (ROV), required to obtain reliable visual information, used for surveillance and maintenance of ship shells and underwater structures of Colombian port facilities. The thrust force is analyzed at the operational conditions by using CFD tools (FLUENT™, CFX™, COSMOSFLOW™) and the information about forces, torques and power of the vehicle's thrusters is obtained. The commercial propellers were modeled by using a reverse engineering process with a 3D scanner and Computer Aided Design (CAD) software (RAPIDFORM™). The results obtained with the CFD package allowed to evaluate several operating scenarios of the vehicle that are used for feedback purposes in the design process of the ROV before it be manufactured. Copyright © 2008 by ASME.
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    Ítem
    Thermodynamics Theory for Damage Evolution in Solids
    (Springer New York, 2015-01-01) Basaran, Cemal; Nie, Shihua; Gomez, J.; Gunel, Eray; Shidong Li; Minghui Lin; Hong Tang; Chengyong Yan; Wei Yao; Hua Ye; Basaran, Cemal; Nie, Shihua; Gomez, J.; Gunel, Eray; Shidong Li; Minghui Lin; Hong Tang; Chengyong Yan; Wei Yao; Hua Ye; Universidad EAFIT. Departamento de Ingeniería Mecánica; Mecánica Aplicada
    In this chapter the thermodynamic theory behind damage mechanics is presented. The presented damage evolution model is purely physical, rather than empirical. Entropy production rate is used as a damage metric.
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    Ítem
    Using Maple and special functions to study the propagation of coherent light beams inside the Earth-ionosphere waveguide with turbulent media
    (SPIE-INT SOC OPTICAL ENGINEERING, 2012-05-07) Montoya Isaza, Sebastian; Ospina Giraldo, Juan Fernando; Montoya Isaza, Sebastian; Ospina Giraldo, Juan Fernando; Universidad EAFIT. Departamento de Ciencias; Lógica y Computación
    Some special functions of the Mathematical Physics are a very helpful resource in problems involving the propagation of coherent light beams, which will suffer dispersion in a turbulent media such as the Earth's ionosphere waveguide. Unfortunately, these tools are difficult to use because it involves very complex mathematical developments. For this reason it is interesting to find a friendly method to make the implementation of these special functions possible. Using Maple I will be able to overcome the mathematical difficulty of solving these equations and get to the understanding of these phenomena. Specifically I will consider the excitation of the Earth's ionosphere as a cavity or a waveguide by satellite borne current sources in the form of satellite-based antennas when the medium inside the waveguide is turbulent. As a result, three kinds of coherent light beams will be derived: Bessel beams, for relatively low turbulence, Whittaker beams, for moderate turbulence, and Heun beams, for strong or fully developed turbulence. These beams are represented by the corresponding electric fields but the associated magnetic fields can be derived as well. It is verified that Maple is a very powerful tool in the study of the propagation of an input field through axially symmetric systems using the methods of the Mathematical Physics. It is expected that Maple will have important applications for more general models concerning propagation trough turbulent environments. © 2012 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).