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Large deflection model for rub-impact analysis in high-speed rotor-bearing system with mass unbalance
H.P. Phadatare,
Published in Elsevier Ltd
Volume: 132
This research article investigated the rotor-casing contact phenomena of a high-speed rotor-bearing system under mass unbalance situation. Here, large deflection rotor-bearing model with a flexible shaft, a rigid disk loaded with an unbalance mass and contact phenomenon between a disk and casing of the rotating system has been used. A nonlinear mathematical model of a rotating system has been developed to study the steady-state stability by elucidating the state of bifurcation and route to chaos phenomena. The steady-state bifurcations and plausible route to chaos phenomena have been explored by numerically solving the governing motion upon gradually varying the design parameters i.e., flexible co-efficient, friction, shaft speed and unbalance mass. The rub-impact onto this large deflection model along with mass unbalance advocates the changes in dynamic state and ill-fated instability where the system losses its structural stability due to the presence of critical bifurcation and sensitivity toward chaotic responses. The present system enables a complex dynamic evolving with periodic, multi-period periodic solutions, sequences of period-doubling to chaotic motion on a gradual change in design variables. The results obtained will contribute to predict and identify the parametric conditions at which the system is safe from any contact between casing and rotor–disk. © 2021 Elsevier Ltd
About the journal
JournalData powered by TypesetInternational Journal of Non-Linear Mechanics
PublisherData powered by TypesetElsevier Ltd
Open AccessNo