Earthquakes and Structures

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Evaluation of vibration characteristics according to changes in the fixing conditions of the electrical cabinet in power plants under an earthquake

  • Lee, Sang-Moon (Department of Civil Engineering, Gangneung-Wonju National University) ;
  • Jeon, Bub-Gyu (Seismic Research and Test Center, Pusan National University) ;
  • Jung, Woo-Young (Department of Civil Engineering, Gangneung-Wonju National University)
  • Received : 2022.02.16
  • Accepted : 2022.09.15
  • Published : 2022.09.25
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Abstract

This study is a basic study on the seismic reinforcement method of anchors of fixed parts in order to reduce the effect of seismic motion that affects the facilities in the event of an earthquake. By applying the test method of ICC ES AC 156, a seismic simulation experiment was performed on the vibration table with three axes simultaneously using the number of connecting bolts between cabinets and channels as a parameter. In addition, the reliability of the experiment was verified using numerical analysis, and the part about the dynamic characteristics that could not be performed according to the experimental limit was investigated through numerical analysis. As a result of the experiment, it was confirmed that the natural frequency of the main body was increased due to the increase in the number of connecting bolts between the cabinet-channel. Accordingly, it was judged that the rigidity of the lower part of the cabinet was increased due to seismic reinforcement. It was analyzed that the impact delivered to the body was effectively reduced. In the future, if the reinforcement of the connection parts mentioned in this study is added to the existing seismic reinforcement of the electrical cabinets, it is expected that the damage to the electrical cabinets of the power plant equipment caused by an earthquake will be effectively reduced.

Keywords

Acknowledgement

This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2021R1A6A1A03044326) and the power plant research program (22IFIP-B128598-06) funded by the Ministry of Land, Infrastructure, and Transport.

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