In this paper, a new rotor-ball bearings-support-stator coupling system dynamic model with rubbing coupling faults is established for practical aeroengine. In the model, the rubbing fault is modeled, the stator motion is considered, the flexible support and squeeze film damper are established, and the nonlinear factors of ball bearing, such as the clearance of the bearing, the nonlinear Hertzian contact force between balls and races, and the varying compliance vibration because of the periodical variety of the contact position between balls and races, are modeled. The numerical integral method is used to obtain the system responses, the effect of support stiffness on rotor responses is studied using a vibration amplitude-rotating speed plot, and the characteristics of the rubbing fault is analyzed using a 3D cascade plot. An aeroengine tester with a stator is established to carry out the rubbing fault experiments, the simulation results from the rotor-ball bearings-support-stator coupling model are compared with the experimental results, and the consistency of the results show fully the effectiveness of the new rotor-ball bearings-support-stator coupling model with rubbing fault.

Issue Section:
Gas Turbines: Structures and Dynamics
Keywords:
aerospace engines, ball bearings, rotors, stators
Topics:
Bearings, Rotors, Stators, Vibration
1.
Wen
,
B. C.
,
Wu
,
X. H.
, and
Han
,
Q. K.
, 2004,
The Nonlinear Dynamics Theory and Experiments of Rotating Mechanism With Faults
,
Science Press
,
Beijing
, pp.
149
–
151
(in Chinese).
2.
Muszynska
,
A.
, and
Goldman
,
P.
, 1995, “
Chaotic Responses of Unbalance Rotor Bearing Stator Systems With Looseness or Rubs
,”
Chaos, Solitons Fractals
0960-0779,
5
(
9
), pp.
1683
–
1704
.
Crossref
Search ADS
 
3.
Liu
,
Y. F.
,
Zhao
,
M.
, and
Zhu
,
H. J.
, 2002, “
The Study on the Chaos Characteristics of Rotor With Rubbing and Pedestal Looseness Faults
,”
Journal of Vibration and Shock
,
21
(
4
), pp.
36
–
38
(in Chinese).
4.
Luo
,
Y. G.
,
Li
,
Z. F.
,
Liu
,
C. L.
, and
Wen
,
B. C.
, 2003, “
Study on Nonlinear Behavior of Rotor System With Pedestal Looseness and Rubbing Faults
,”
China Mechanical Engineering
,
14
(
14
), pp.
1224
–
1226
(in Chinese).
5.
Li
,
Z. P.
,
Luo
,
Y. G.
,
Yao
,
H. L.
, and
Wen
,
B. C.
, 2003, “
Dynamics of Rotor-Bearing System With Coupling Faults of Crack and Rub-Impact
,”
Chinese Journal of Applied Mechanics
,
20
(
3
), pp.
136
–
140
(in Chinese).
6.
Yuan
,
H. Q.
,
Wen
,
B. C.
,
Wamg
,
D. Y.
, and
Liu
,
S. L.
, 2003, “
Nonlinear Dynamic Properties of Rolling Bear-Rotor-Stator Box with Local Rubbing
,”
Journal of Northeastern University (Natural Science)
,
24
(
3
), pp.
244
–
247
(in Chinese).
7.
Fukata
,
S.
,
Gad
,
E. H.
, and
Kondou
,
T.
, 1985, “
On the Radial Vibration of Ball Bearings (Computer Simulation)
,”
Bull. JSME
0021-3764,
28
, pp.
899
–
904
.
Crossref
Search ADS
 
8.
Jiang
,
J. F.
,
Hu
,
L. J.
, and
Tang
,
J.
, 2004,
Numerical Analysis and MATLAB Experimentation
,
Science Press
,
Beijing
, pp.
149
–
151
(in Chinese).
9.
Mevel
,
B.
, and
Guyader
,
J. L.
, 1993, “
Routs to Chaos in Ball Bearing
,”
J. Sound Vib.
0022-460X,
162
(
3
), pp.
471
–
487
.
Crossref
Search ADS
 
10.
Aeroengine Design Manual Compiling Committee
, 2000,
Aeroengine Design Manual (19th part): Rotor Dynamics and Whole-Engine Vibration
,
Aviation Industry Press
,
Beijing
, pp.
208
–
226
(in Chinese).
11.
Chen
,
Y. S.
,
Tian
,
J. Y.
,
Jin
,
Z. W.
, and
Ding
,
Q.
, 1999, “
Theory of Nonlinear Dynamics and Applied Techniques of Solving Irregular Operation of a Large Scale Gas Turbine in a Comprehensive Way
,”
China Mechanical Engineering
,
10
(
9
), pp.
1063
–
1067
(in Chinese).
12.
Gao
,
Y. L.
,
Li
,
Y.
, and
Wang
,
D. Y.
, 2002, “
Experimental Investigation of Rotor-to-Casing Rubbing Fault
,”
Aeroengine
,
4
, pp.
16
–
21
(in Chinese).
Copyright © 2010
 by American Society of Mechanical Engineers
You do not currently have access to this content.