Computer-Aided Design最新文献_第8页

Virtual design of woven fabrics based on parametric modeling and physically based rendering 基于参数建模和物理渲染的编织物虚拟设计

IF 4.3 3区计算机科学

Computer-Aided Design Pub Date : 2024-04-28 DOI: 10.1016/j.cad.2024.103717

Wentao Deng , Wei Ke , Zhongmin Deng , Xungai Wang

引用次数: 0

Generation of continuous and sparse space filling toolpath with tailored density for additive manufacturing of biomimetics 生成具有定制密度的连续稀疏空间填充工具路径，用于生物仿生增材制造

IF 4.3 3区计算机科学

Computer-Aided Design Pub Date : 2024-04-26 DOI: 10.1016/j.cad.2024.103718

Sadaival Singh , Ambrish Singh , Sajan Kapil, Manas Das

{"title":"Generation of continuous and sparse space filling toolpath with tailored density for additive manufacturing of biomimetics","authors":"Sadaival Singh , Ambrish Singh , Sajan Kapil, Manas Das","doi":"10.1016/j.cad.2024.103718","DOIUrl":"https://doi.org/10.1016/j.cad.2024.103718","url":null,"abstract":"<div><p>A method of generating a continuous toolpath that can be biased in a user-specified direction of travel is proposed for the fabrication of density-based functionally graded parts through <em>Additive Manufacturing (AM)</em>. The methodology utilizes <em>Lin Kernighan's (LK) Travelling Salesman Problem (TSP)</em> solver over a digitized grid within the contour domain to generate a toolpath with minimal lifts and a common start and end point. Three force-based methods of digitization, namely rectangular, circular, and contour adaptive, are proposed in this work. Each of these methods initialize from a structured or an unstructured grid, where the grid points are assumed to be connected with either linear (rectangular digitization) or a combination of linear and torsional springs (circular and contour adaptive digitization). Enforcing an equilibrium amongst the spring forces and appropriately selecting the ideal spring length, the necessary configuration of grid points can be generated for a desired toolpath.</p><p>The density of grid points (consequently, part density) can be varied through the user-defined input function or an image-based density map imposed on the ideal spring length over the contour domain. The proposed toolpath, as a case study, was implemented for printing a bone with density prescribed through a CT scan image stack. The CT scan of the printed part qualitatively establishes the conformity of the toolpath to the user-specified density gradient.</p></div>","PeriodicalId":50632,"journal":{"name":"Computer-Aided Design","volume":"173 ","pages":"Article 103718"},"PeriodicalIF":4.3,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140894582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Newton Geometric Iterative Method for B-Spline Curve and Surface Approximation 用于 B 样条曲线和曲面逼近的牛顿几何迭代法

IF 4.3 3区计算机科学

Computer-Aided Design Pub Date : 2024-04-21 DOI: 10.1016/j.cad.2024.103716

Qiuyang Song, Pengbo Bo

引用次数: 0

Neural PDE Solvers for Irregular Domains 不规则域的神经 PDE 求解器

IF 4.3 3区计算机科学

Computer-Aided Design Pub Date : 2024-04-14 DOI: 10.1016/j.cad.2024.103709

Biswajit Khara , Ethan Herron , Aditya Balu , Dhruv Gamdha , Chih-Hsuan Yang , Kumar Saurabh , Anushrut Jignasu , Zhanhong Jiang , Soumik Sarkar , Chinmay Hegde , Baskar Ganapathysubramanian , Adarsh Krishnamurthy

{"title":"Neural PDE Solvers for Irregular Domains","authors":"Biswajit Khara , Ethan Herron , Aditya Balu , Dhruv Gamdha , Chih-Hsuan Yang , Kumar Saurabh , Anushrut Jignasu , Zhanhong Jiang , Soumik Sarkar , Chinmay Hegde , Baskar Ganapathysubramanian , Adarsh Krishnamurthy","doi":"10.1016/j.cad.2024.103709","DOIUrl":"https://doi.org/10.1016/j.cad.2024.103709","url":null,"abstract":"<div><p>Neural network-based approaches for solving partial differential equations (PDEs) have recently received special attention. However, most neural PDE solvers only apply to rectilinear domains and do not systematically address the imposition of boundary conditions over irregular domain boundaries. In this paper, we present a neural framework to solve partial differential equations over domains with irregularly shaped (non-rectilinear) geometric boundaries. Given the shape of the domain as an input (represented as a binary mask), our network is able to predict the solution field, and can generalize to novel (unseen) irregular domains; the key technical ingredient to realizing this model is a physics-informed loss function that directly incorporates the interior-exterior information of the geometry. We also perform a careful error analysis which reveals theoretical insights into several sources of error incurred in the model-building process. Finally, we showcase various applications in 2D and 3D, along with favorable comparisons with ground truth solutions.</p></div>","PeriodicalId":50632,"journal":{"name":"Computer-Aided Design","volume":"172 ","pages":"Article 103709"},"PeriodicalIF":4.3,"publicationDate":"2024-04-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140633402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Denoising point clouds with fewer learnable parameters 用更少的可学习参数对点云进行去噪

IF 4.3 3区计算机科学

Computer-Aided Design Pub Date : 2024-03-30 DOI: 10.1016/j.cad.2024.103708

Huankun Sheng , Ying Li

{"title":"Denoising point clouds with fewer learnable parameters","authors":"Huankun Sheng , Ying Li","doi":"10.1016/j.cad.2024.103708","DOIUrl":"10.1016/j.cad.2024.103708","url":null,"abstract":"<div><p>Point cloud denoising is a crucial task in the field of geometric processing. Recent years have witnessed significant advancements in deep learning-based point cloud denoising algorithms. These methods, compared to traditional techniques, demonstrate enhanced robustness against noise and produce point cloud data of higher fidelity. Despite their impressive performance, achieving a balance between denoising efficacy and computational efficiency remains a formidable challenge in learning-based methods. To solve this problem, we introduce LPCDNet, a novel lightweight point cloud denoising network. LPCDNet consists of three main components: a lightweight feature extraction module utilizing trigonometric functions for relative position encoding; a non-parametric feature aggregation module to leverage semantic similarities for global context comprehension; and a decoder module designed to realign noise points with the underlying surface. The network is designed to capture both local details and non-local structures, thereby ensuring high-quality denoising outcomes with a minimal parameter count. Extensive experimental evaluations demonstrate that LPCDNet achieves comparable or superior performance to state-of-the-art methods, while significantly reducing the number of learnable parameters and the necessary running time.</p></div>","PeriodicalId":50632,"journal":{"name":"Computer-Aided Design","volume":"172 ","pages":"Article 103708"},"PeriodicalIF":4.3,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140401215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Latent Diffusion Models for Structural Component Design 用于结构组件设计的潜在扩散模型

IF 4.3 3区计算机科学

Computer-Aided Design Pub Date : 2024-03-22 DOI: 10.1016/j.cad.2024.103707

Ethan Herron, Jaydeep Rade, Anushrut Jignasu, Baskar Ganapathysubramanian, Aditya Balu, Soumik Sarkar, Adarsh Krishnamurthy

{"title":"Latent Diffusion Models for Structural Component Design","authors":"Ethan Herron, Jaydeep Rade, Anushrut Jignasu, Baskar Ganapathysubramanian, Aditya Balu, Soumik Sarkar, Adarsh Krishnamurthy","doi":"10.1016/j.cad.2024.103707","DOIUrl":"https://doi.org/10.1016/j.cad.2024.103707","url":null,"abstract":"<div><p>Recent advances in generative modeling, namely Diffusion models, have revolutionized generative modeling, enabling high-quality image generation tailored to user needs. This paper proposes a framework for the generative design of structural components. Specifically, we employ a Latent Diffusion model to generate potential designs of a component that can satisfy a set of problem-specific loading conditions. One of the distinct advantages our approach offers over other generative approaches is the editing of existing designs. We train our model using a dataset of geometries obtained from structural topology optimization utilizing the SIMP algorithm. Consequently, our framework generates inherently near-optimal designs. Our work presents quantitative results that support the structural performance of the generated designs and the variability in potential candidate designs. Furthermore, we provide evidence of the scalability of our framework by operating over voxel domains with resolutions varying from <span><math><mrow><mn>3</mn><msup><mrow><mn>2</mn></mrow><mrow><mn>3</mn></mrow></msup></mrow></math></span> to <span><math><mrow><mn>12</mn><msup><mrow><mn>8</mn></mrow><mrow><mn>3</mn></mrow></msup></mrow></math></span>. Our framework can be used as a starting point for generating novel near-optimal designs similar to topology-optimized designs.</p></div>","PeriodicalId":50632,"journal":{"name":"Computer-Aided Design","volume":"171 ","pages":"Article 103707"},"PeriodicalIF":4.3,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140330715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A study on the design method of multivariable control chalice-shaped columns considering horizontal forces based on multi-objective optimization 基于多目标优化的考虑水平力的多变量控制茶碗形支柱设计方法研究

IF 4.3 3区计算机科学

Computer-Aided Design Pub Date : 2024-03-15 DOI: 10.1016/j.cad.2024.103706

Han Zhang , Hang Dai , Wenjing Ren

引用次数: 0

Periodic implicit representation, design and optimization of porous structures using periodic B-splines 使用周期 B-样条对多孔结构进行周期隐式表示、设计和优化

IF 4.3 3区计算机科学

Computer-Aided Design Pub Date : 2024-03-11 DOI: 10.1016/j.cad.2024.103703

Depeng Gao, Yang Gao, Hongwei Lin

{"title":"Periodic implicit representation, design and optimization of porous structures using periodic B-splines","authors":"Depeng Gao, Yang Gao, Hongwei Lin","doi":"10.1016/j.cad.2024.103703","DOIUrl":"https://doi.org/10.1016/j.cad.2024.103703","url":null,"abstract":"<div><p>Porous structures are intricate solid materials with numerous small pores, extensively used in fields like medicine, chemical engineering, and aerospace. However, the design of such structures using computer-aided tools is a time-consuming and tedious process. In this study, we propose a novel representation method and design approach for porous units that can be infinitely spliced to form a porous structure. We use periodic B-spline functions to represent periodic or symmetric porous units. Starting from a voxel representation of a porous sample, the discrete distance field is computed. To fit the discrete distance field with a periodic B-spline, we introduce the constrained least squares progressive-iterative approximation algorithm, which results in an implicit porous unit. This unit can be subject to optimization to enhance connectivity and utilized for topology optimization, thereby improving the model’s stiffness while maintaining periodicity or symmetry. The experimental results demonstrate the potential of the designed complex porous units in enhancing the mechanical performance of the model. Consequently, this study has the potential to incorporate remarkable structures derived from artificial design or nature into the design of high-performing models, showing the promise for biomimetic applications.</p></div>","PeriodicalId":50632,"journal":{"name":"Computer-Aided Design","volume":"171 ","pages":"Article 103703"},"PeriodicalIF":4.3,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140121990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Robust Hole-Detection in Triangular Meshes Irrespective of the Presence of Singular Vertices 无论是否存在奇异顶点，都能在三角形网格中进行可靠的孔检测

IF 4.3 3区计算机科学

Computer-Aided Design Pub Date : 2024-02-28 DOI: 10.1016/j.cad.2024.103696

Mauhing Yip , Annette Stahl , Christian Schellewald

{"title":"Robust Hole-Detection in Triangular Meshes Irrespective of the Presence of Singular Vertices","authors":"Mauhing Yip , Annette Stahl , Christian Schellewald","doi":"10.1016/j.cad.2024.103696","DOIUrl":"https://doi.org/10.1016/j.cad.2024.103696","url":null,"abstract":"<div><p>In this work, we present a boundary and hole detection approach that traverses all the boundaries of an edge-manifold triangular mesh, irrespectively of the presence of singular vertices, and subsequently determines and labels all holes of the mesh. The proposed automated hole-detection method is valuable to the computer-aided design (CAD) community as all boundary-edges within the mesh are utilized and for each boundary-edge the algorithm guarantees both the existence and the uniqueness of the boundary associated to it. As existing hole-detection approaches assume that singular vertices are absent or may require mesh modification, these methods are ill-equipped to detect boundaries/holes in real-world meshes that contain singular vertices. We demonstrate the method in an underwater autonomous robotic application, exploiting surface reconstruction methods based on point cloud data. In such a scenario the determined holes can be interpreted as information gaps, enabling timely corrective action during the data acquisition. However, the scope of our method is not confined to these two sectors alone; it is versatile enough to be applied on any edge-manifold triangle mesh. An evaluation of the method is performed on both synthetic and real-world data (including a triangle mesh from a point cloud obtained by a multibeam sonar). The source code of our reference implementation is available: <span>https://github.com/Mauhing/hole-detection-on-triangle-mesh</span><svg><path></path></svg>.</p></div>","PeriodicalId":50632,"journal":{"name":"Computer-Aided Design","volume":"170 ","pages":"Article 103696"},"PeriodicalIF":4.3,"publicationDate":"2024-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S001044852400023X/pdfft?md5=15189e6bb47b6319e85b8bbbfd406777&pid=1-s2.0-S001044852400023X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140024119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A computational implementation of Vector-based 3D Graphic Statics (VGS) for interactive and real-time structural design 用于交互式实时结构设计的基于矢量的 3D 图形静力学 (VGS) 的计算实现

IF 4.3 3区计算机科学

Computer-Aided Design Pub Date : 2024-02-20 DOI: 10.1016/j.cad.2024.103695

Jean-Philippe Jasienski , Yuchi Shen , Patrick Ole Ohlbrock , Denis Zastavni , Pierluigi D'Acunto

{"title":"A computational implementation of Vector-based 3D Graphic Statics (VGS) for interactive and real-time structural design","authors":"Jean-Philippe Jasienski , Yuchi Shen , Patrick Ole Ohlbrock , Denis Zastavni , Pierluigi D'Acunto","doi":"10.1016/j.cad.2024.103695","DOIUrl":"10.1016/j.cad.2024.103695","url":null,"abstract":"<div><p>This article presents a computational implementation for the Vector-based Graphic Statics (VGS) framework making it an effective CAD tool for the design of spatial structures in static equilibrium (VGS-tool). The paper introduces several key features that convert a purely theoretical graph and geometry based framework into a fully automated computational procedure, including the following new contributions: a general algorithm for constructing 3-dimensional interdependent force and force diagrams; the implementation of a procedure that allows the interdependent transformation of both diagrams; an approach to apply specific constraints to the computationally generated diagrams; the integration of the algorithms as a plug-in for a CAD environment (Grasshopper3D of Rhino3D). The main features of the proposed framework are highlighted with a design case study developed using the newly introduced CAD plug-in (namely the VGS-tool). This plugin uses synthetic-oriented and intuitive graphical representation to allow the user to design spatial structures in equilibrium as three-dimensional trusses. The goal is to facilitate collaboration between structural engineers and architects during the conceptual phase of the design process.</p></div>","PeriodicalId":50632,"journal":{"name":"Computer-Aided Design","volume":"171 ","pages":"Article 103695"},"PeriodicalIF":4.3,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139956210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0