考虑间隙的空间圆柱铰多体系统运动学精度及动力学分析

发布时间：2018-06-20 14:55

本文选题：空间圆柱铰 + 接触模式　；参考：《振动与冲击》2017年19期

【摘要】：为了研究空间圆柱铰间隙对系统性能的影响,针对典型的空间圆柱间隙铰结构,分析了其所有可能出现的接触模式。针对空间圆柱铰轴向和径向都存在间隙的情况,对复杂的接触模式进行了几何和运动学分析,提出一种改进的计算潜在接触点位置的方法,建立了接触碰撞力模型,将其带入多体系统动力学方程。对空间双摆进行了理想模型和间隙模型的对比分析。结果表明,由于轴向和径向间隙的存在,系统的运动学精度和动力学性能都受到了很大的影响,间隙大小的变化也会改变系统的运动学到位精度。空间圆柱间隙铰的建模方法和结果为机械结构的设计和改进提供了理论依据。
[Abstract]:In order to study the effect of space cylindrical hinge clearance on system performance, all possible contact modes are analyzed for typical spatial cylindrical hinge structure. In this paper, the geometrical and kinematic analysis of the complex contact mode is carried out for the space cylindrical hinge with clearance in both axial and radial directions. An improved method for calculating the position of potential contact points is proposed, and the contact impact force model is established. It is introduced into the dynamics equation of multibody system. The ideal model and the gap model of space double pendulum are compared and analyzed. The results show that the kinematics accuracy and dynamic performance of the system are greatly affected by the existence of axial and radial clearance, and the change of clearance size will also change the kinematics accuracy of the system. The modeling method and results of space cylindrical clearance hinge provide theoretical basis for the design and improvement of mechanical structure.
【作者单位】：南京理工大学机械工程学院;
【基金】：江苏省自然科学基金(BK20140773)
【分类号】：TH113.2

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