纺织学报 ›› 2020, Vol. 41 ›› Issue (03): 154-159.doi: 10.13475/j.fzxb.20190605106

• 机械与器材 • 上一篇    下一篇

剑杆织机打纬凸轮接触碰撞力建模与仿真

魏展1,2, 金国光1,2(), 李博1,2, 宋艳艳1, 路春辉1   

  1. 1.天津工业大学 机械工程学院, 天津 300387
    2.天津工业大学 天津市现代机电装备技术重点实验室, 天津 300387
  • 收稿日期:2019-06-24 修回日期:2019-12-18 出版日期:2020-03-15 发布日期:2020-03-27
  • 通讯作者: 金国光
  • 作者简介:魏展(1986—),男,讲师,博士生。主要研究方向为机械系统柔性动力学与纺织机械动力学。
  • 基金资助:
    国家自然科学基金项目(51475330);天津市高等学校创新团队培养计划(TD13-5037);天津市自然科学基金项目(18JCQNJC05300)

Modeling and simulation of contact force generated by beating-up cam in rapier looms

WEI Zhan1,2, JIN Guoguang1,2(), LI Bo1,2, SONG Yanyan1, LU Chunhui1   

  1. 1. School of Mechanical Engineering, Tiangong University, Tianjin 300387, China
    2. Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tiangong University, Tianjin 300387, China
  • Received:2019-06-24 Revised:2019-12-18 Online:2020-03-15 Published:2020-03-27
  • Contact: JIN Guoguang

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摘要：

针对剑杆织机打纬凸轮副接触碰撞建模及仿真验证比较困难的问题,探讨便捷有效的接触碰撞力建模方法。首先,基于L-N接触碰撞模型,在现有接触碰撞力混合模型的基础上,改进并建立适用于打纬凸轮系统的接触碰撞力模型,进而对碰撞力及碰撞变形进行求解;其次,应用瞬态碰撞分析软件ANSYS/LS-DYNA并配合可视化软件LS-PrePost,对模型计算结果进行仿真验证;在验证结果的正确性后,分别计算碰撞初速度和碰撞点曲率半径对碰撞力和变形量的影响程度。结果表明:碰撞初始速度和凸轮曲率半径都会对碰撞过程动态响应产生影响,但碰撞初速度对系统碰撞力和碰撞变形量影响更为明显。

关键词: 剑杆织机, 打纬凸轮, 接触碰撞力模型, 碰撞变形, 碰撞初速度

Abstract:

Aiming at the difficulty in modeling the contact force generated by the beating-up cam in rapier looms, this paper reports on a convenient and effective method for simulating the contact force. Based on the L-N contact-impact model and the existing mixed model of contact-impact force, the contact-impact force model suitable for the beating-up cam system is improved and established, which helps solve the impact force and deformation. The transient impact analysis software ANSYS/LS-DYNA and the visualization software LS-PrePost are used to simulate and verify the calculation results of the model. After validating the modelling results, the influence of the initial impact velocity and the curvature radius of the impact point on the impact force and deformation is calculated respectively. The results show that both the initial impact velocity and the radius of cam curvature have notable influence on the dynamic response of the impact process, with the initial impact velocity having more obvious influence on the impact force and the deformation of the system.

Key words: rapier loom, beating-up cam, contact force model, impacting deformation, initial impact velocity

中图分类号: 

  • TH112

图1

打纬凸轮-滚子机构模型"

图2

碰撞力与碰撞变形量"

图3

凸轮-滚子机构离散化"

图4

碰撞过程模拟仿真"

图5

滚子和凸轮标记点"

图6

碰撞变形量仿真与计算结果对比"

图7

5种碰撞初速度下碰撞力和碰撞变形量"

图8

最大碰撞力和最大碰撞变形量随碰撞初速度变化规律"

图9

5种碰撞点凸轮曲率半径下碰撞力和碰撞变形量"

图10

最大碰撞力和最大碰撞变形量随曲率半径变化规律"

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