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http://dx.doi.org/10.5050/KSNVE.2014.24.2.079

A Study of Analytical Integrity Estimations for the Structure and Rotor System of an Emergency Diesel Generator  

Kim, Chae-Sil (Dept. of Mechanical Engineering, Changwon National University)
Choi, Heon-Oh (C&K ENG)
Jung, Hoon-Hyung (Changwon National University)
Publication Information
Transactions of the Korean Society for Noise and Vibration Engineering / v.24, no.2, 2014 , pp. 79-86 More about this Journal
Abstract
This paper describes an integrity evaluation method for emergency diesel generator(EDG) and rotor part of EDG. EDG is a very important equipment in the nuclear power plant(NPP). EDG supplies electricity to the safety-related equipments for the safety shut down of NPP in an emergency situation of earthquake. The safety of the rotor part of EDG is also important during seismic impact from earthquake. The finite element modelling of the EDG including rotor part was constructed. The modal analysis of EDG was firstly performed. The first natural frequency was calculated and revealed higher than the cutoff frequency of seismic spectrum. Then the stress analysis was done to compare with the allowable stress. The safety of the rotor part was investigated by the finite element analysis of the rotor and journal bearing interaction to find film thickness and critical speed. The seismic load was applied to rotor part in a manner that the load was a weighted static load. Analysis results showed that the maximum stress was within the range of allowable stress and the film thickness is larger than the permissible minimum thickness, and the critical speed was out of the operating speed. Hence, the structural and dynamic integrity of EDG could be confirmed by the numerical analysis method used in this paper. However, dynamic analysis of a rotating rotor and supporting bearing with the seismic impact needs to be investigated in a more rigorous method since the seismic load to the rotating part complicates the behavior of rotating system.
Keywords
Structural Integrity; Emergency Diesel Generator(EDG); Seismic Analysis; Rotor Dynamic Analysis;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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