高速剑杆织机动力学优化设计关键问题研究

High-speed rapier loom occupies important position in modern textile machinery. In this program, the local deformation of collision process between cam and the roller of high-speed rapier loom is accurately described，contact collision model of cam pair with clearance is established based on the theory of finite element method and modal coordinates. Based upon the theoretical modal model and contact collision model of cam pair with clearance of flexible components，nonlinear dynamic model of flexible mechanism of high-speed rapier loom with pair clearance is established. Through the analysis of the three institutions dynamic characteristics to the loom overall performance, global dynamics performance evaluation index system of high-speed rapier loom is established. In view of the high speed of high-speed rapier loom characteristics- - high speed, high precision, low load，dynamic optimal design theory and method of high-speed rapier loom is established. The main content including: recearch on contact collision model of cam pair with clearance, recearch on nonlinear dynamic model of flexible mechanism of high-speed rapier loom with pair clearance, establish on dynamics performance evaluation index system of high-speed rapier loom, recearch on dynamic optimal design theory and method of high-speed rapier loom. This project will provide systemic theory and method of dynamics optimization design for high-speed rapier loom. And meanwhile, important theories and experimental basis will be provied for the development of the textile machinery industry in CHINA.

高速剑杆织机在现代纺织机械中占有举足轻重的地位。本项目首次提出基于有限元法和模态坐标理论，准确描述凸轮与滚子间碰撞接触过程中的接触局部变形，建立基于有限元法的含间隙凸轮副接触碰撞模型；基于柔性构件的理论模态模型和含间隙凸轮副接触碰撞模型，首次提出建立含运动副间隙的高速剑杆织机柔性机构非线性动力学模型；通过分析三大机构动力学特性与织机整体性能的关系，首次提出建立高速剑杆织机全局动力学性能评价指标体系；针对高速剑杆织机转速高、精度高、载荷低的特点,首次提出并建立高速剑杆织机动力学优化设计理论与方法体系。主要内容包括：含间隙凸轮副接触碰撞模型研究；含运动副间隙的高速剑杆织机柔性机构非线性动力学研究；高速剑杆织机动力学性能评价指标体系的建立；高速剑杆织机动力学优化设计理论与方法研究。 本项目将为高速剑杆织机动力学优化设计提供系统完善的理论与方法，为我国纺织机械行业的发展提供重要的理论和实验依据。

高速剑杆织机在现代纺织机械中占有举足轻重的地位。针对剑杆织机三大机构，本项目选用常用的机构类型，在运动学分析的基础上，基于有限元法和模态坐标理论，精确建立其动力学模型并对其进行动力学及可靠性分析；针对高速剑杆织机转速高、精度高、载荷低的特点,通过分析打纬、引纬等机构动力学特性与织机整体性能的关系，建立高速剑杆织机动力学性能评价指标，并针对所提指标对剑杆织机机构进行了优化；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，改进并建立适用于含间隙的滚子—凸轮系统接触碰撞力模型，进行碰撞力及碰撞变形求解。主要内容包括：高速剑杆织机柔性机构非线性动力学研究；关键机构的运动学可靠性和动力学可靠性研究；高速剑杆织机动力学性能评价指标的建立；高速剑杆织机动力学优化设计方法研究；含间隙的滚子—凸轮系统接触碰撞模型研究。. 本项目为高速剑杆织机动力学优化设计提供系统完善的理论依据与方法，为我国纺织机械行业的发展提供重要的理论和实验依据。