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针对高速柔性转子支承松动的结构特征、力学特征以及多支点转子系统动力学设计的需要,研究了转子支承结构松动引起支承刚度非连续变化的产生机理,建立了支承松动转子系统动力学模型,分析了支承松动转子系统存在混沌运动的条件,即当转子动力特性对支承刚度变化敏感时,受支承刚度阶跃影响,支承松动转子系统会产生混沌运动。根据多支点转子系统动力学特性与支承结构位置、刚度的相关性,采用优化支承位置和支承刚度的方法,使转子动力特性对支承刚度非连续变化不敏感,为多支点高速柔性转子系统的动力学优化设计提供了设计途径。
In view of the structural characteristics, mechanical characteristics and dynamic design of multi-fulcrum rotor system of high-speed flexible rotor, the mechanism of discontinuous variation of bearing stiffness caused by loosening of rotor support structure is studied. The dynamic model of loose rotor system is established and analyzed The condition of chaotic motion of the loose rotor system is that when the dynamic characteristics of the rotor are sensitive to the change of the support stiffness, the chaos of the loose rotor system will occur due to the step of the support stiffness. According to the correlation between the dynamic characteristics of multi-fulcrum rotor system and the position and stiffness of support structure, the method of optimizing support position and support stiffness is adopted to make rotor dynamic characteristics insensitive to the discontinuous change of support stiffness, which is the power of multi-fulcrum high-speed flexible rotor system Learning to optimize the design provides a design approach.