多梳贾卡织物结构形变研究与计算机仿真

Structural deformation and simulation of multi-bar jacquard fabrics

为实现多梳贾卡织物的形变模拟,尤其是提花地网中不同大小网眼对织物形变的模拟,建立了适用于多梳贾卡经编织物的质点弹簧模型。通过研究多梳贾卡织物的组织结构和贾卡提花原理,将地梳线圈简化为质点,连接线圈之间的延展线简化为弹簧,并进一步将地梳、氨纶梳和衬纬贾卡梳、花梳形成的组织简化为纵向结构弹簧、卷曲弹簧、横向结构弹簧和约束弹簧;研究了线圈质点在4种弹簧复合作用下的受力,引入弹簧阻尼力以减小质点弹簧系统的振动;采用显式欧拉方法求解任意时刻质点的运动状态来减少线圈形变模拟过程的计算时间;通过实样举例,将形变模拟的预测效果与上机编织样布进行对比,验证了所建质点弹簧模型的正确性和实用性。

Deformation,caused by various jacquard meshes,is the key core of simulation for multi-bar jacquard fabrics. To perfect its deformation simulation,a tailored mass-spring model is built in agreement with structure features and jacquard theory. With this model,ground pillars are referred to as particles,while underlap between two courses is referred to as a longitudinal structural spring. Similarly,spandex inlay is referred to as coil spring,jacquard inlay as transverse structural spring and pattern lapping as restriction spring. Resultant force on particles by these four springs is calculated to analyze motion state and simulate deformation with explicit Euler method. Finally,simulated deformation based on the massspring model is proved accurate when compared with real samples.