中国物理B ›› 2015, Vol. 24 ›› Issue (7): 74501-074501.doi: 10.1088/1674-1056/24/7/074501
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
刘爽a b, 王兆龙a, 赵双双a, 李海滨a b, 李建雄a b
Liu Shuang (刘爽)a b, Wang Zhao-Long (王兆龙)a, Zhao Shuang-Shuang (赵双双)a, Li Hai-Bin (李海滨)a b, Li Jian-Xiong (李建雄)a b
摘要: Grazing bifurcation of a relative rotation system with backlash non-smooth characteristic is studied along with the change of the external excitation in this paper. Considering the oil film, backlash, time-varying stiffness and time-varying error, the dynamical equation of a relative rotation system with a backlash non-smooth characteristic is deduced by applying the elastic hydrodynamic lubrication (EHL) and the Grubin theories. In the process of relative rotation, the occurrence of backlash will lead to the change of dynamic behaviors of the system, and the system will transform from the meshing state to the impact state. Thus, the zero-time discontinuous mapping (ZDM) and the Poincare mapping are deduced to analyze the local dynamic characteristics of the system before as well as after the moment that the backlash appears (i.e., the grazing state). Meanwhile, the grazing bifurcation mechanism is analyzed theoretically by applying the impact and Floquet theories. Numerical simulations are also given, which confirm the analytical results.
中图分类号: (Rotational dynamics)