丝绸2025，Vol.62Issue(7)：62-69,8.DOI:10.3969/j.issn.1001-7003.2025.07.007
多股线针织物的几何建模与热传递特性分析
Geometric modeling and thermal transfer characteristics analysis of multi-strand knitted fabrics
摘要
Abstract
Multi-strand knitted fabrics are widely used in fields such as clothing and thermal insulation protection due to their unique geometric structure and excellent thermal conductivity properties.With the increasing demand for high-performance functional materials,the limitations of traditional materials in thermal insulation performance are becoming increasingly apparent.Therefore,the development of new fabrics with outstanding thermal properties has become an important research direction.Multi-strand knitted fabrics,as a special fabric structure,exhibit thermal transfer behavior that is influenced by factors such as the fabrics' structural design,material properties,and weaving process.Exploring optimization strategies for their thermal performance is of great practical significance.However,the geometric modeling approach integrating systematic mathematical models with spline curves remains inadequate.This study aims to establish a geometric model for multi-strand knitted fabrics and systematically analyze its thermal transfer properties through finite element analysis methodology,so as to provide theoretical support for the design and optimization of such fabrics. This study first constructed a geometric model of multi-strand knitted fabrics.Referencing the cross-sectional arrangement of twisted yarn fibers,it established a multi-strand cross-sectional model and constructed arbitrary spatial strand trajectory curves by integrating arc control point mapping with cylindrical strand trajectory equations.Based on observations of knitted fabric structures and testing data,a universal loop trajectory model was established,and modeling software was employed to generate a three-dimensional multi-strand knitted fabric system model.Subsequently,finite element analysis software was utilized to conduct thermal simulations of the fabric-air system,analyzing the heat transfer characteristics of multi-strand knitted fabrics from two dimensions:different heat transfer surfaces and different time steps.Thermal resistance values for four distinct fabric types were calculated using the Fourier's law-based thermal resistance formula from simulation results,followed by validation analysis against experimental data.Building on this approach,this study systematically established strand cross-section models and strand trajectory models compatible with both few-strand and multi-strand yarns.Subsequently,using a control point mapping method as the linkage,the yarn models were integrated with the knitted loop model to construct a multi-strand knitted fabric model.Research results demonstrate that the proposed fabric modeling method can rapidly and accurately reproduce the geometric morphology of fabrics.Through finite element simulations from perspectives of different heat transfer surfaces and time steps,the temperature distribution and heat transfer performance of the fabric system across varying time increments were investigated.When the top and bottom surfaces served as heat transfer interfaces,the fabric exhibited optimal heat transfer performance,while the side surfaces demonstrated excellent thermal insulation properties.The study further revealed that the fabric's heat transfer performance was closely related to its structure,with shorter temperature equilibrium times observed at interlacing points.By calculating the thermal resistance of four different fabric types and comparing them with experimental values,results showed that the thermal resistance error was within±10％,validating the feasibility and accuracy of the model's thermal transfer simulation. The study also highlights directions for future improvement,including refining the yarn cross-section model and enhancing the fabric trajectory model.Furthermore,the introduction of intelligent algorithms for optimization prediction and the exploration of different fabric structures,such as rib knits,will contribute to the future development of this field.关键词
多股针织物/股线截面模型/线圈轨迹模型/有限元模拟/热阻/热传递性能Key words
multi-strand knitted fabric/yarn cross-section model/coil trajectory model/finite element simulation/thermal resistance/thermal transfer performance分类
轻工纺织引用本文复制引用
杨仁权,汪泽幸..多股线针织物的几何建模与热传递特性分析[J].丝绸,2025,62(7):62-69,8.基金项目
湖南省研究生科研创新立项不资助项目(LXBZZ202438) （LXBZZ202438）
