La presente Tesis de Master tiene como objetivo la modificación del programa CALTEP2000 estacionario, el cual estudia la transmisión de calor mediante el Método de Elementos Finitos (MEF).
Esta modificación pretende adaptar dicho programa al estudio aerodinámico en problemas de fluidos con la aproximación de Flujo Potencial. De esta forma, la adaptación permite soslayar un problema numérico que surge, en fenómenos de flujo alrededor de objetos aerodinámicos que presentan un borde de fuga, si no se toman las precauciones adecuadas.
Una vez obtenida esta adaptación, se procede a validarla con un perfil de ala sencillo y el programa educativo ED-Poiss y, posteriormente, con un cilindro circular y con perfiles NACA-63012A y NACAM-12. Debido a la complejidad de estos últimos, se utiliza para validarlos el programa comercial DesignFOIL, especializado en el estudio de perfiles de ala.
Abstract
La presente Tesis de Master tiene como objetivo la modificación del programa CALTEP2000 estacionario, el cual estudia la transmisión de calor mediante el Método de Elementos Finitos (MEF).
Esta modificación pretende adaptar dicho programa al [...]
During the last 20 years computational progress has significantly increased the capacity to determine the behavior of structures under complex loading conditions through finite element models analysis. This computational power can be used to build complex detailed finite element models but also to resolve more complex equations which were not possible to be coded before. Accurate buckling prediction is still a key factor on optimized structural designs. The accurate determination of the onset of buckling is absolutely essential to determine the initial point of instability and the subsequent post-buckling capability. Determining if the buckling will lead to immediate failure or the loading will be able to be redistributed afterwards is a major point to be considered. Designing a structural component with loading redistribution capability optimize the weight and increase the accuracy, so is a key objective of designers on structural components like torque boxes or fuselage skin. During years Airbus has been focused on developing accurate buckling predictions from close form solutions to complex energy methods development. This paper aims to summarize the evolution of such methods with special emphasis in energy methods and the best practices followed in Airbus for development. On top a summary of potential room for improvement and further evolution will be proposed.
Abstract
During the last 20 years computational progress has significantly increased the capacity to determine the behavior of structures under complex loading conditions through finite element models analysis. This [...]