Affiliations: State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi'an Jiaotong University, Xi'an, Shaanxi, China
Correspondence:
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Corresponding author: Yanhua Sun, School of Mechanical Engineering, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an 710049, Shaanxi, China. E-mail:sunyanhua@mail.xjtu.edu.cn
Abstract: This paper presented a coupled electromechanical model
and numerical method to obtain the torque response in a gas turbine rotor
through transient analysis. Firstly, the FE model of the rotor based on beam
elements and the electrical model of the generator were established. Then a
contact element was introduced in the FE model to consider the contact
effect between discs of the gas turbine rotor. The 4th Runge-Kutta method
and Newmark method were used to solve the coupled equations iteratively to
obtain the numerical solution of the transient response. Finally, a case
study was presented and the results show much differences with those
obtained through the conventional uncoupled analysis. The method and results
of this paper are important to the rotor dynamic analysis and design of the
gas turbine rotor in engineering.
Keywords: gas turbine, short circuit fault, electromechanical coupling, transient response
