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Investigación sobre envolventes ligeras

José Miguel Rico

Gabriel Ruiz Mújica

 

 

Trabajo de investigación sobre diseño y modelado paramétrico aplicado a envolventes ligeras. 

El trabajo expone cómo se define una pieza de metal expandido mediente técnicas de modelado paramétrico a través de NURBS (acrónimo inglés de non-uniform rational B-spline).

La investigación aborda con detalle los trabajos de análisis geométrico mediante técnicas de escaneado en 3D, de evaluación y cálculo de transmitancia de luz diurna asistida por ordenar con BTDF (acrónimo inglés de bidirectional transmittance distribution function), los trabajos de gestión de resultados obtenidos y de sus representaciones gráficas e interpretación de datos. Se realizan también varios análisis comparativos de los acabados y los espesores de modelos de las mallas generados. 

Con los resultados y las mejoras realizadas con este trabajo se obtiene un modelo de la malla en la ultima versión del Rhinoceros/Grasshopper EM 3D modeler. Como cualquier modelo 3D, la malla generada se puede utilizar para las aplicaciones habituales: como parte de un modelo completo de un edificio, para renderizar, para simulaciones energéticas, de iluminación, térmicas. También se puede exportar a casi cualquier programa o software de modelado. 

2018
Irisgarritasuna eta sistemak

``Moreover, thanks to parametric modeling, it is very easy to create as many samples as needed. ``

Fragmentos selecionados (VO): 

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Any good design is parametrical, as it must have some premise for its shape. These premises can be related to the use, manufacture, geometry, etc. they are, after all, the determining factors of the design.

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Because expanded metal is a product based on a repeated form, we must find the minimal unit of the form that is repeated in the space.

 

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A NURB (Non Uniform Rational Basis Spline) is a mathematical manner of defining geometry created by CAD industries in the 70’s to unify in one standard the mathematical models to represent curves and free surfaces. They offer a unified representation of spline and conic geometries. They were developed starting from Bézier curves (defined by Pierre Bézier) and the mathematical work done by Paul de Faget de Casteljau in the early 60’s. 

 

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One of the greatest advantages of computer modeling is that, both the performance and the luminous behavior of certain meshes can be compared before they are manufactured or installed in a facade. 

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Moreover, thanks to parametric modeling, it is very easy to create as many samples as needed. After obtaining BSDF values for each mesh, their transmittance can be compared. 

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As the possible comparisons are endless, the following features have been chosen as comparison criteria: mesh surface finish and strand width. These analyses serve, in a way, to validate the results of the process. Further tasks could be to compare samples with different shapes (rhomboidal, hexagonal, square), different orientations, other geometric variations, etc. 

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One of the greatest advantages of computer modeling is that, both the performance and the luminous behavior of certain meshes can be compared before they are manufactured or installed in a facade. Moreover, thanks to parametric modeling, it is very easy to create as many samples as needed. 

 

 

 

 

José Miguel Rico

j.rico@ehu.eus