Dynamic Modeling and Experimental Verification on the Rotor-Armature Structure of a Steam Turbine-Generator Unit

Hassan Jalali*, Farzad Rafieian, Hamed Haddad Khodaparast

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The rotor-armature structure of an exciter rotor used in a steam turbine-generator unit is investigated in this work. The objective is to create a base verified linear dynamic model of the exciter rotor for fault diagnosis or nonlinear interactions analysis. Natural frequencies for the rotor-armature structure are obtained from modal testing in free-free conditions. An analytical model for the structure is then constructed using Timoshenko beam theory, in which the linear effect of contact interface between rotor and armature is included. The unknown parameters of the rotor-armature model are identified by comparing analytical and experimental results. The verified dynamic model serves as the base for fault diagnosis and nonlinear response analysis due to the rotor and armature interactions.
Original languageEnglish
Pages (from-to)802-814
Number of pages13
JournalApplied Mathematical Modelling
Volume107
Early online date1 Apr 2022
DOIs
Publication statusE-pub ahead of print - 1 Apr 2022

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