Dec 1, 2012 · In this paper, an efficient GPU implementation of the 3D-DDA algorithm is proposed, which effectively reduces such branch divergence and improves performance of the C∕S dose calculation...

Feb 24, 2021 · The 3D-DDA is a displacement-based implicit method that can calculate 3D deformable block systems, which are formed by the mutual contacts and displacement constraints among several blocks of arbitrary shapes.

Mar 15, 2025 · In this study, aiming at the continuous-discontinuous simulation of 3D-DDA, a highly efficient contact detection strategy is proposed. Firstly, the global direct search (GDS) method is integrated into the 3D-DDA framework to address intricate contact scenarios.

Nov 1, 2021 · In this study, an explicit three-dimensional discontinuous deformation analysis (3D-DDA) is parallelized. Using explicit contact force circumvents the open-close iteration and makes the global stiffness matrix block-diagonal.

This work proposes a novel 3D dual-domain attention module to learn local and global information in spatial and context domains from encoding feature maps in Unet.

Jun 1, 2022 · Three-dimensional discontinuous deformation analysis (3D-DDA) is a powerful deformable discrete element method that is derived from the principle of minimum potential energy.

Jul 23, 2015 · The three-dimensional discontinuous deformation analysis (3D-DDA) is a promising numerical method for both static and dynamic analyses of rock systems. Lacking mature software, its popularity is far behind its ability.

Nov 29, 2012 · The three-dimensional digital differential analyzer (3D-DDA) algorithm is a widely used ray traversal method, which is also at the core of many convolution/superposition (C/S) dose calculation approaches.

The Digital Differential Analyzer (DDA) algorithm, adapted to 3D, is exactly the thing one needs to travel along a line (or a ray) through a grid of voxels.

Fast and simple voxel traversal algorithm through a 3D space partition.