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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

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.

References

  1. Abdelnaby, A.E. and Elnashai, A.S. (2015), "Numerical modeling and analysis of RC frames subjected to multiple earthquakes", Earthq. Struct., 9(5), 957-981. http://doi.org/10.12989/eas.2015.9.5.957.
  2. Calvi, P.M. (2014), "Relative displacement floor spectra for seismic design of nonstructural elements", J. Earthq. Eng., 18(7), 1037-1059. https://doi.org/10.1080/13632469.2014.923795.
  3. Chang, S.J., Jeong, Y.S., Eem, S.H., Choi, I.K. and Park, D.U. (2021), "Evaluation of MCC seismic response according to the frequency contents through the shake table test", Nucl. Eng. Technol., 53(4), 1345-1356. https://doi.org/10.1016/j.net.2020.10.002.
  4. Dhakal, R.P., Pourali, A., Tasligedik, A.S., Yeow, T., Baird, A., MacRae, G., ... and Palermo, A. (2016), "Seismic performance of non-structural components and contents in buildings: An overview of NZ research", Earthq. Eng. Eng. Vib., 15(1), 1-17. https://doi.org/10.1007/s11803-016-0301-9.
  5. Eem, S.H., Jeon, B.G., Jang, S.J. and Choi, I.K. (2019), "Evaluate the characteristics of vibration caused by rocking modes of electric cabinet under seismic loading", Trans. Korean Soc. Noise Vib. Eng., 29(6), 735-744. https://doi.org/10.5050/KSNVE.2019.29.6.735
  6. Eleftheriadou, A.K. and Karabinis, A.I. (2012), "Seismic vulnerability assessment of buildings based on damage data after a near field earthquake (7 September 1999 Athens-Greece)", Earthq. Struct., 3(2), 117-140. http://doi.org/10.12989/eas.2012.3.2.117.
  7. Gupta, A., Rustogi, S.K. and Gupta, A.K. (1999), "Ritz vector approach for evaluating incabinet response spectra", Nucl. Eng. Des., 190(3), 255-272. https://doi.org/10.1016/S0029-5493(99)00076-X.
  8. Hur, J. (2012), "Seismic performance evaluation of switchboard cabinets using nonlinear numerical models", Doctor of Philosophy in the School of Civil and Environmental Engineering, Georgia Institute of Technology, USA.
  9. Hwang, K.M., Chun, N.H., Chung, G.Y. and Park, K.S. (2020), "Study on seismic performance evaluation and verification of seismic safety for power cable tunnels", KEPCO J. Electric Power Energy, 6(4), 439-445. https://doi.org/10.18770/KEPCO.2020.06.04.439.
  10. ICC ES AC 156 (2010), Acceptance Criteria for Seismic Certification by Shake-table Testing of Nonstructural Components, International Code Council, New York, NY, USA.
  11. Jeon, B.G., Yun, D.W., Shin, Y.J. and Jung, W.Y. (2019), "Seismic performance evaluation for hydroelectric power plants RTU panel by shaking table tests", Korea Soc. Nois. Vib. Eng., KSNVE, 29(6), 770-779.
  12. Kang, S., Kim, B., Bae, S., Lee, H. and Kim, M. (2019), "Earthquake-induced ground deformations in the low-seismicity region: A case of the 2017 M5. 4 Pohang, South Korea, earthquake", Earthq. Spectra, 35(3), 1235-1260. https://doi.org/10.1193/062318EQS160M.
  13. KDS 41 17 00 (2019), Korean Design Standard, Ministry of Land, Infrastructure, and Transport, Seoul, South Korea.
  14. Kim, M.K. and Choi, I.K. (2011), "A shaking table test for an Reevaluation of seismic fragility of electrical cabinet in NPP", J. Comput. Struct. Eng. Inst. Korea, 24(3), 295-305.
  15. Lee, S.H., Choi, H.S. and Jeon, B.G. (2014), "Test procedures and practices of seismic performance certification for nonstructural components", Mag. Korea Inst. Struct. Mainten. Inspect., 18(3), 48-56.
  16. Lee, S.M. and Jung, W.Y. (2020), "Evaluation of anchorage performance of the switchboard cabinet under seismic loading condition", Adv. Mech. Eng., 12(5), 1687814020926309. https://doi.org/10.1177/1687814020926309.
  17. Lee, S.M. Jeon, B.G., Yoon, D.W., Kim, S.W. and Jung, W.Y. (2020), "Seismic response characteristics of used molded transformer anchored on concrete slab", Trans. Korean Soc. Noise Vib. Eng., 30(6), 624-633. https://doi.org/10.5050/KSNVE.2020.30.6.624
  18. Liu, C., Ma, K., Wei, X., He, G., Shi, W. and Zhou, Y. (2017), "Shaking table test and time-history analysis of high-rise diagrid tube structure", Period. Polytech. Civil Eng., 61(2), 300-312. https://doi.org/10.3311/PPci.9243.
  19. Moon, J.Y., Kwon, M.H., Kim, J.S. and Lim, J.H. (2018), "Seismic fragility evaluation of cabinet panel by nonlinear time history analysis", J. Korea Acad.-Indust. Coop. Soc., 19(2), 50-55. https://doi.org/10.5762/KAIS.2018.19.2.50.
  20. Mottaghi-Kashtiban, M. and Shayesteh, M.G. (2011), "New efficient window function, replacement for the hamming window", IET Signal Pr., 5(5), 499-505. https://doi.org/10.1049/iet-spr.2010.0272.
  21. Oh, S.H., Park, H.Y. and Choi, K.K. (2018), "Seismic damage status and characteristics of non-structural elements", Korea Soc. Nois. Vib. Eng., KSNVE, 28, 71-77.
  22. Preciado, A., Ramirez-Gaytan, A., Salido-Ruiz, R.A., Caro-Becerra, J.L. and Lujan-Godinez, R. (2015), "Earthquake risk assessment methods of unreinforced masonry structures: Hazard and vulnerability", Earthq. Struct., 9(4), 719-733. http://doi.org/10.12989/eas.2015.9.4.719.
  23. Ridder, G.C. and Djordjevic, W. (1995), "Results of the USI A-46 seismic walkdown program at the Kewaunee Nuclear Power Plant (No. CONF-950740-)", American Society of Mechanical Engineers, New York, NY, USA
  24. RRA (2015), Seismic Test Method for Telecommunication Facilities, National Radio Research Agency, Seoul, South Korea.
  25. Salahudin, F. and Setiyono, B. (2019), "Design of Remote Terminal Unit (RTU) panel supply monitoring based on IOT case study at PLN", 2019 6th International Conference on Information Technology, Computer and Electrical Engineering (ICITACEE), September.
  26. Yang, J., Rustogi, S.K. and Gupta, A. (2003), "Rocking stiffness of mounting arrangements in electrical cabinets and control panels", Nucl. Eng. Des., 219(2), 127-141. https://doi.org/10.1016/S0029-5493(02)00279-0.
  27. Yun, D.W., Chang, S.J., Jeon, B.G., Eem, S.H. and Choi, I.K. (2019), "An experimental study on characteristics of vibration caused by rocking modes of electric cabinet under seismic loading", Proceedings of the 25th Conference on Structural Mechanics in Reactor Technology, Charlotte, NC, August.
  28. Yurdakul, M., Yilmaz, F., Artar, M., Can, O., Oner, E. and Daloglu, A.T. (2021), "Investigation of time-history response of a historical masonry minaret under seismic loads", Struct., 30, 265-276. https://doi.org/10.1016/j.istruc.2021.01.008.