On the stability of periodic motions of an unbalanced rigid rotor on lubricated journal bearings

被引:19
作者
Brancati, R [1 ]
Russo, M [1 ]
Russo, R [1 ]
机构
[1] UNIV SALERNO, FAC INGN, IST INGN MECCAN, I-84100 SALERNO, ITALY
关键词
journal bearings; unbalanced rotor; sub-synchronous orbits;
D O I
10.1007/BF00045456
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
A theoretical investigation is carried out on the orbital motions of a symmetrical, unbalanced, rigid rotor subjected to a constant vertical load and supported on two lubricated journal bearings. In order to determine the fluid film forces, the short bearing theory is adopted. A method is illustrated that makes it possible to determine the analytical equation of the orbit as an approximated solution of the system of non-linear differential equations of motion of the journal axis. A procedure is also described for evaluating the stability of the solution found. Diagrams of the curves delimiting, in the working plane of the rotor sigma-m sigma, the areas of stability of the various periodic solutions determined are provided. Finally, the results obtained are compared and combined with those provided by a direct integration of the motion equation made using the Runge-Kutta method.
引用
收藏
页码:175 / 185
页数:11
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