支承刚度各向异性部分充液转子系统的稳定性

在二维无粘旋转流体模型的基础上,本文研究了支承刚度各向异性部分充液转子系统的稳定性问题,系统地分析了转子系统的各参数对其稳定性的影响.结果发现转子的支承刚度非对称并非一定导致出现两个互相独立的不稳定区,只有在系统参数的一定组合情况下,两个独立的不稳定区才会出现.

Stability of a Rotor System on Support of Anisotropical Rigidity and Partially Filled with an Inviscid Fluid

The stability of rigid rotor on support of anisootropical rigidity with a cavity chamber partially filled with fluid was studied on the basis of a two-dimensional inviscid rotating fluid model.The effects of the system parameters,such as fluid fill ratio,mass ratio,external damping and support anisotropical rigidity ratio,on the instability of the rotor system were considered.It is shown that there probably exist two unstable regions of the rotational speeds that correspond to the two critical speeds of the rigid rotor system.However,the anisotropical rigidity of the support does not always result in occurring two unstable regions of rotational speeds.The possibility of their occurrence also depends on other system parameters.Since the anisotropical rigidity of support always makes the unstable region of rotational speeds increase,it is suggested that the support of anisotropical rigidity should be avoided as possible.