42-Issue 7

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https://diglib.eg.org/handle/10.2312/3543886

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Browsing 42-Issue 7 by Subject "aided design"

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    An Efficient Self-supporting Infill Structure for Computational Fabrication
    (The Eurographics Association and John Wiley & Sons Ltd., 2023) Wang, Shengfa; Liu, Zheng; Hu, Jiangbei; Lei, Na; Luo, Zhongxuan; Chaine, Raphaƫlle; Deng, Zhigang; Kim, Min H.
    Efficiently optimizing the internal structure of 3D printing models is a critical focus in the field of industrial manufacturing, particularly when designing self-supporting structures that offer high stiffness and lightweight characteristics. To tackle this challenge, this research introduces a novel approach featuring a self-supporting polyhedral structure and an efficient optimization algorithm. Specifically, the internal space of the model is filled with a combination of self-supporting octahedrons and tetrahedrons, strategically arranged to maximize structural integrity. Our algorithm optimizes the wall thickness of the polyhedron elements to satisfy specific stiffness requirements, while ensuring efficient alignment of the filled structures in finite element calculations. Our approach results in a considerable decrease in optimization time. The optimization process is stable, converges rapidly, and consistently delivers effective results. Through a series of experiments, we have demonstrated the effectiveness and efficiency of our method in achieving the desired design objectives
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    Precomputed Radiative Heat Transport for Efficient Thermal Simulation
    (The Eurographics Association and John Wiley & Sons Ltd., 2023) Freude, Christian; Hahn, David; Rist, Florian; Lipp, Lukas; Wimmer, Michael; Chaine, Raphaƫlle; Deng, Zhigang; Kim, Min H.
    Architectural design and urban planning are complex design tasks. Predicting the thermal impact of design choices at interactive rates enhances the ability of designers to improve energy efficiency and avoid problematic heat islands while maintaining design quality. We show how to use and adapt methods from computer graphics to efficiently simulate heat transfer via thermal radiation, thereby improving user guidance in the early design phase of large-scale construction projects and helping to increase energy efficiency and outdoor comfort. Our method combines a hardware-accelerated photon tracing approach with a carefully selected finite element discretization, inspired by precomputed radiance transfer. This combination allows us to precompute a radiative transport operator, which we then use to rapidly solve either steady-state or transient heat transport throughout the entire scene. Our formulation integrates time-dependent solar irradiation data without requiring changes in the transport operator, allowing us to quickly analyze many different scenarios such as common weather patterns, monthly or yearly averages, or transient simulations spanning multiple days or weeks. We show how our approach can be used for interactive design workflows such as city planning via fast feedback in the early design phase.