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FEMAP V11.3: Geometry CleanUp
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La herramienta Feature Removal (Meshing Toolbox) de la nueva versión de FEMAP V11.3 tiene nuevas opciones para los tipos de entidades a eliminar:
• POINT: se utiliza para eliminar puntos redundantes.
        NOTA: si de forma simultánea se selecciona más de un punto la herramienta está diseñada para no eliminar puntos pertenecientes a curvas con grandes diferencias en curvatura. Puede haber casos donde la curvatura no sea muy diferente, por ejemplo cuando un punto pertenece a dos Splines, y la herramienta no elimine el punto debido a dicha limitación de diseño. Cuando se selecciona un único punto, la herramienta utiliza una técnica más agresiva que permite eliminar el punto, pero únicamente cuando se selecciona uno-a-uno, OK?.
• CURVE: aquí tenemos las siguientes opciones, Basic, Aggressive y Combine Surfaces.
        • BASIC (default): usa los mismos recursos de la orden GEOMETRY > SOLID > CLEANUP para eliminar curvas redundantes.
        • AGRESSIVE: usa funcionalidades del "Parasolid Bodyshop" para eliminar segmentos cortos mientras se mantiene la validez de la geometría. Esta orden puede cambiar la topología de la geometría.
        • COMBINE SURFACES: usa el kernel Parasolid para crear una nueva superficie en base a las surperficies originales que comparten la curva a eliminar. Tras finalizar la operación se eliminan todas las curvas pertenecientes a las dos surperficies originales, ya que son redundantes. Esta opción también elimina cualquier punto redundante en los extremos de las curvas eliminadas.
Saludos,
Blas.
https://iberisa.files.wordpress.com/2016/07/feature-removal-femapv113-animated.gif

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FEMAP V11.3: Interactive Mesh Refine
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This new command of FEMAP V11.3 allows you to dynamically “highlight” 2-D shell elements to refine using one of two patterns, “original quad element split into four quad elements” (i.e., the 1 to 4 Pattern) or “original quad element split into nine quad elements” (i.e., the 1 to 9 Pattern). Any elements surrounding the “refined elements” will be automatically splited using appropriate “transition patterns” to maintain connectivity between the “newly refined mesh” and the “origi­nal mesh”. As the elements are “highlighted”, a preview of the “refined mesh” and “transition mesh” will be “painted” on the original elements. Once you are satisfied with the mesh refinement, click OK to update the origi­nal mesh. In addition, there is an option to split shell elements in two halves or into thirds by using specified vector to “split along”. Finally, any line elements sharing nodes with a refined or modified shell element will also be split appropriately.
Enjoy!.
Best regards,
Blas.
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Blas,

Any best practice advice on how to incorporate a stepper motor into a FEM?
I don't really need all the details...

I was thinking about a CM element, a couple of Ks to capture stiffness...
Just curious how one would approach this...

The trouble really is that the motor has not been chosen yet...

thanks

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FLUID FLOW ANALYSIS (CFD) WITH FEMAP TMG FLOW
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FEMAP TMG Thermal and Flow software is a comprehensive heat transfer and CFD simulation package which provides fast and accurate solutions to complex thermal and flow problems.
Using advanced finite difference control volume technology, FEMAP TMG makes it easy to model nonlinear and transient heat transfer and fluid flow processes including conduction, radiation, orbital heating, free convection, forced convection, and phase change.

FEMAP TMG FLOW models complex 3-D fluid flow around, through and within model arbitrary geometry. An element-based finite volume method is used to model 3D fluid velocity, temperature and pressure by solving the Navier-Stokes equations. The analysis models incompressible flow in enclosures, flow turbulence, surface convection, and fluid advection. Calculation points for momentum, mass, and energy are co-located and the momentum and mass equations are solved together. Flow turbulence can be modeled using fixed turbulent viscosity or k-e turbulence models.

Best regards,
Blas.
www.iberisa.com

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FEMAP FORCED FREQUENCY RESPONSE

Posted on 20 January, 2016 by Blas Molero (IBERISA)

En el propio FEMAP tenemos disponible desde la versión 10.2 (Noviembre de 2010) una “joya” desconocida para muchos usuarios: la posibilidad de realizar “con el paquete básico” de FEMAP un Análisis Dinámico de Respuesta Forzada a partir de los resultados de frecuencias y modos de vibración obtenidos con “cualquier” solver de Análisis por Elementos Finitos del mercado. Los resultados de respuesta dinámica calculados por FEMAP son exactamente los mismos que se obtendrían mediante un Análisis Dinámico Modal de Respuesta en Frecuencias utilizando el módulo dinámico avanzado de NX NASTRAN (SOL111). La orden la tenéis en FEMAP en “Model > Output > Forced Response“.
https://iberisa.wordpress.com/2016/01/20/femap-forced-frequency-response/

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“Turning Vision into Reality”

Advancements in material synthesis opens a world of possibilities for designers, to dream beyond the conventional. Learn how to design with accuracy some of the most refined and stylish machines of tomorrow through ‘Femap’ one of the most Advanced Design Tools by Siemens. At Cosimtec Engineering Solutions (Singapore) we help you master the skills of Structural Design using Femap and other Design Tools.
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