摘要
文章选用间隙铰的连续接触模型,利用刚性短杆替代运动副之间的间隙,并默认运动副之间始终保持接触,在ADAMS中建立了含连杆摇杆运动副间隙四杆机构的虚拟样机,并进行动力学仿真;仿真分析结果显示出运动副间隙对高速运动机构从动件的加速度影响很大,因此在高速机械设计中必须严格控制运动副间隙的大小;并通过对间隙杆受力大小和方向变化的分析,可以认为在曲柄运动的一个周期中,运动副之间可能产生一次或多次分离.
Using ADAMS, the virtual prototyping of a four bar mechanism with a clearance between linkage- rocker joint is modeled. The continuous contacting model of the revolute joint with clearance is modeled by making use of a short rigid bar, defaulting that the elements of the joint keep contacting all the time. The result of simulation analysis shows that the clearance influences the acceleration of driven-part badly under high-speed moving, so the size of clearance must be restricted strictly for high-speed mechanism. By analyzing the magnitude and the direction of force loading on the clearance-bar, it is believable that the elements of the pair will lose contacting one time or more in a cycle of crank＇s movement.
出处
《襄樊学院学报》
2006年第5期89-91,共3页
Journal of Xiangfan University
关键词
四杆机构
虚拟样机
动力学
Four bar
Mechanism
Virtual prototyping
Dynamics
