TY - JOUR
T1 - Dynamic Modeling and Experimental Verification on the Rotor-Armature Structure of a Steam Turbine-Generator Unit
AU - Jalali, Hassan
AU - Rafieian, Farzad
AU - Khodaparast, Hamed Haddad
PY - 2022/7/1
Y1 - 2022/7/1
N2 - 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.
AB - 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.
KW - Dynamic characteristic
KW - Parameter identification
KW - Rotor-armature
KW - Structural modeling
UR - http://www.scopus.com/inward/record.url?scp=85127364905&partnerID=8YFLogxK
U2 - 10.1016/j.apm.2022.03.009
DO - 10.1016/j.apm.2022.03.009
M3 - Article
SN - 0307-904X
VL - 107
SP - 802
EP - 814
JO - Applied Mathematical Modelling
JF - Applied Mathematical Modelling
ER -