基于柔性多体系统的经编机梳栉摆动机构动力学分析

摘要

As one of the key mechanisms, the guide bar swing mechanism directly impacts the high speed running performance of warp knitting machine. The paper analyzes the changes of constraining force of the guide bar rotating shaft at low speed, and establishes the flexible multi-body dynamic model of guide bar swing mechanism of warp knitting machine by virtue of the analysis software of ADAMS and Nastran. It analyzes the dynamic response when the warp knitting machine is running at high speed, and has determined the changing level of allowed shogging angle of guide bar at high speed, the deviation level and changing tendency of guide needle pinpoint position at different speeds, and the changing tendency and causes of vibration of guide bar swing mechanism.%梳栉摆动机构是经编机的主要机构之一,直接影响经编机的高速运行性能.为此,仿真分析了梳栉转轴在低速运行时约束反力的变化情况,并借助ADAMS以及Nastran分析软件建立了经编机梳栉摆动机构的柔性多体动力学模型.分析经编机高速运行时的动态响应,得出在高速运行时梳栉允许横移时间角改变的程度,在不同转速下导纱针针尖位置的偏差程度和变化趋势,及梳栉摆动机构振动的变化趋势及其原因.