基于物理约束的纬编针织物动态形变模拟  

Dynamic deformation simulation of weft knitted fabrics based onphysical constraints

作　　者：梁金星 李东盛 韩开放 胡新荣[2] 彭佳佳 李立军 LIANG Jinxing;LI Dongsheng;HAN Kanfang;HU Xinrong;PENG Jiajia;LI Lijun(School of Automation,Qingdao University,Qingdao,Shandong 266071,China;School of Computer and Artificial Intelligence,Wuhan Textile University,Wuhan,Hubei 430200,China;School of Textiles,Garments and Design,Changshu Institute of Technology,Changshu,Jiangsu 215500,China;Ningbo Cixing Co.,Ltd.,Ningbo,Zhejiang 315300,China)

机构地区：[1]青岛大学自动化学院,山东青岛266071 [2]武汉纺织大学计算机与人工智能学院,湖北武汉430200 [3]常熟理工学院纺织服装与设计学院,江苏常熟215500 [4]宁波慈星股份有限公司,浙江宁波315300

出　　处：《纺织学报》2025年第3期109-115,共7页Journal of Textile Research

基　　金：中国纺织工业联合会应用基础研究项目(J202209);湖北省服装信息化工程技术研究中心开放课题资助项目(2022HBCI03)。

摘　　要：为模拟针织物纱线间的相互作用和线圈形态变化,提出一种基于物理约束的针织物动态形变模拟方法。首先,将纱线划分为多个胶囊几何体,通过构建距离约束、罚函数约束、碰撞约束和摩擦约束以及阻尼,有效模拟了线圈嵌套结构、纱线间摩擦行为、纱线的弹性响应以及纱线碰撞等关键物理现象;然后,基于NVIDIA PhysX的物理仿真实现过程,实现了不同针织花型的仿真。结果表明:模型可实现不同针织花型的形变,展示针织花型在外力作用下纱线弯曲、拉伸和扭曲的形变特征;仿真效果与真实样品具有较好一致性和逼真度,验证了所提出模型的准确性。该研究为针织物形变模拟领域提供了新的视角,对针织花型设计、模拟软件开发以及针织工艺优化具有重要价值。Objective This research aims to develop a dynamic deformation simulation method for weft-knitted fabrics based on physical constraints,addressing the complex interactions and morphological changes of yarns in knitted structures.The significance of this work lies in providing a new perspective for the design of knitted patterns,the development of simulation software,and the optimization of knitting processes.Method The method of this research encompasses the development of a dynamic deformation simulation for weft-knitted fabrics based on a comprehensive physical model.The yarns are represented as a series of discrete capsule geometries,each corresponding to the physical properties of actual yarns.The simulation framework integrates several key components,including distance constraints to maintain yarn integrity and prevent over-extension,penalty functions to simulate yarn bending and ensure the yarn′s resistance to deformation,collision constraints to prevent interpenetration of yarn segments ensuring that the simulated structure respects the physical space occupied by each yarn,and friction constraints to mimic the sliding behavior between yarns,which is essential for the stability of the knitted structure.Damping is introduced to dissipate kinetic energy and facilitate the convergence of the simulation to a stable state.The simulation leverages NVIDIA PhysX,a physics engine,to manage complex interactions and constraints.The process involves initializing capsule-shaped rigid bodies,applying constraints,and iteratively updating positions and rotations within a simulation loop to achieve a steady state of yarn-level knitting patterns.The simulation parameters and constraints are carefully calibrated to reflect the mechanical properties of the yarns and the structural characteristics of the knitted fabric.The algorithm iteratively updates the control points and render model to ensure that the deformation and motion of the fabric throughout the simulation are coherent and accurate.The simulation results are then c

关 键 词：针织物 形变模拟 物理约束 针织花型仿真 胶囊体 

分 类 号：TS101[轻工技术与工程—纺织工程]