Critical Speed of a Dual Rotor System
Application ID: 78211
Due to the demand for larger power with a smaller size, dual-shaft systems with intershaft bearings are becoming a standard configuration for gas turbine engines. Such systems consist of two coaxial rotors running at different speeds, interlinked through a multi-spool bearing.
In this example, eigenfrequency analysis is performed for such a dual-rotor system in order to determine the critical speed. Cross-exciting vibrations through multi-spool bearings makes the dynamic behavior of one shaft dependent on the dynamic behavior of the other.
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