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This study aims to investigate the effects of rotor unbalance and angular misalignment on vibration response in rotor-bearing systems.

Dynamic Response Analysis of a Deep Groove Ball Bearing Supported Rotor under Unbalance and Coupling Misalignment

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This study aims to investigate the effects of rotor unbalance and angular misalignment on vibration response in rotor-bearing systems.
Conducted controlled experiments using a laboratory-scale rotor-bearing test rig.
Systematically varied misalignment levels and unbalance masses across different operating speeds.
Developed an Empirical Dimensionless Analysis model using the Buckingham π-method.
Incorporated nonlinear parameters, including stiffness-damping and backlash effects, into the model.
Experimental data showed unbalance mainly excites the 1X frequency component.
Angular misalignment primarily affects the 2X harmonic.
Coexistence of unbalance and misalignment leads to strong nonlinear coupling, causing amplitude modulation.
The EDA model predicted vibration amplitudes with less than 8% deviation from experimental results.

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Model-based investigation reveals vibration response to unbalance and misalignment in rotating machinery.

Suryawanshi et al. (2026) studied this question.

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