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Abstract:
A
multi-degree-of-freedom dynamic model of a geared rotor bearing system
is developed, which includes hydrodynamic journal bearings and
nonlinearity associated with meshing stiffness, backlash, separation,
back-sided impacts and double-sided impacts between a gear pair. The
mass unbalance response of the system is investigated by applying the
numerical integration. With increasing speed, the dynamic response of
the system first changes from periodic into quasiperiodic motion due to
the meshing stiffness of the gear pair, After speed exceeds some value,
the motion will change from quasiperiodic to chaotic state. Because of
the chaotic motion, the rotor is large deformed in the centerline
direction of the gear pair, and separation, back-sided impacts and
double-sided impacts also occur, which may cause the system damaged.
Key words:
Backlash
Time-varying meshing stiffness Bifurcation Chaos
CLC No: TH113.1 TH132.41
国家自然科学基金资助项目. Received 20001121,
received in revised form 20010528
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