DOI QR코드

DOI QR Code

Seismic Response Prediction of a Structure Using Experimental Modal Parameters from Impact Tests

충격시험에 의한 실험모드특성을 이용한 구조물의 지진응답 예측

  • Published : 2010.04.30

Abstract

An in-cabinet response spectrum should be generated to perform the seismic qualification of devices and instruments mounted inside safety-related electrical equipment installed in nuclear power plants. The response spectrum is available by obtaining accurate seismic responses at the device mounting location of the cabinet. The dynamic behavior of most of electrical equipment may not be easily analyzed due to their complex mass and stiffness distributions. Considering these facts, this study proposes a procedure to estimate the seismic responses of a structure by a combination of a test and subsequent analysis. This technique firstly constructs the modal equations of the structure by using the experiment modal parameters obtained from the impact test. Then the seismic responses of the structure may be calculated by a mode superposition method. A simple steel frame structure was fabricated as a specimen for the validation of the proposed method. The seismic responses of the specimen were estimated by using the proposed technique and compared with the measurements obtained from the shaking table tests. The study results show that it is possible to accurately estimate the seismic response of the structure by using the experimental modal parameters obtained from the impact test.

Keywords

Seismic qualification;In-cabinet response spectrum;Impact test;Experimental modal parameter;Mode superposition

References

  1. ANSI/IEEE, IEEE Recommended Practices for Seismic Qualification of Class 1E Equipment for Nuclear Power Generating Stations, Std.-344, The Institute of Electrical and Electronics Engineers, 2004.
  2. Djordjevic, W., O'Sullivan, J.J., Guidelines for Development of In-Cabinet Amplified Response Spectra for Electrical Benchboards and Panels, EPRI NP-7146s-M, Prepared by Stevenson & Associates, Inc., 1990.
  3. Bandyopadhyay, K.K. and Hofmayer, C.H., Seismic Fragility of Nuclear Power Plant Components (Phase I), NUREG/CR-4659, US Nuclear Regulatory commission, 1986.
  4. T.Y. Chang, Seismic qualification of equipment in operating nuclear power plants, USNRC, NUREG-1030, 1985.
  5. Gupta, A., Yang, S.K. and Gupta, A.K., “Ritz Vector Approach for Evaluating Incabinet Response Spectra,” Nuclear Engineering and Design, Vol. 190, 255-272, 1999. https://doi.org/10.1016/S0029-5493(99)00076-X
  6. Gupta, A., and Yang, J., “Modified Ritz Vector Approach for Dynamic Properties of Electrical Cabinets and Control Panels,” Nuclear Engineering and Design, Vol. 217, 49-62, 2002. https://doi.org/10.1016/S0029-5493(02)00133-4
  7. Yang, J., and Gupta, A., “INCABS: A Computer Program for Evaluating Incabinet Spectra,” Paper #2072, Transactions, SMiRT 16, Washinton DC, August 2001.
  8. Rustogi, S., and Gupta, A., “Modeling the Dynamic Behavior of Electrical Cabinets and Control Panels: Experimental and Analytical Results,” J. Structural Engineering, Vol. 130, No. 3, 511-519, 2004. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:3(511)
  9. 구기영, 취진타오, 조성국, 김두기, “진동시험을 이용한 원자력발전소 캐비닛구조의 지진응답예측 기법,” 한국지진공학회, 제12권, 제5호, 57-63, 2008.
  10. 김두기, 구조동역학, 제 2판, 구미서관, 2009.
  11. MATLAB, The Language of Technical Computing, Version 7.0, Mathworks, 2004.
  12. Richardson, M. and Schwarz, B., “Modal Parameter Estimation form Operating Data,” Sound and Vibration, January 2003.
  13. Richardson, M., “Modal Mass, Stiffness and Damping,” Vibrant Technology, Inc., Jamestown, CA, January, 2000.
  14. STAR User's Guide, Spectral Dynamics, Inc., 1996.
  15. 조성국, 조양희, 소기환, “실험모드분석에 의한 3층 프레임 시편의 지진응답 예측,” 한국지진공학회 2010 춘계학술발표회 논문집, 강원대학교, 2010. 3. 19.
  16. 3-series/NVGate Reference Manual, OROS, 2006.