Transactions of the Korean Society of Mechanical Engineers A (대한기계학회논문집A)

The Korean Society of Mechanical Engineers (대한기계학회)
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Seismic and Structure Analysis of a Temporary Rack Construction in a Nuclear Power Plant

원자력 발전소 공사용 임시받침대의 내진 및 구조해석

  • Kim, Heung-Tae (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.) ;
  • Lee, Young-Shin (Dept. of Mechanical Design Engineering, Chungnam Nat'l Univ.)
  • 김흥태 (충남대학교 기계설계공학과) ;
  • 이영신 (충남대학교 기계설계공학과)
  • Received : 2011.04.13
  • Accepted : 2011.08.01
  • Published : 2011.10.01
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Abstract

In this study, the safety of a rack structure was evaluated through seismic analysis considering fluid-structure interactions using a finite-element model. The rack structure was immersed under water, so it was influenced by the water. The fluid-structure interaction can be specified in terms of the hydrodynamic effect, which is defined as the added mass per unit length. Modal analysis and seismic analysis using the Floor Response Spectrum (FRS) were carried out under Operating Basis Earthquake (OBE) and Safe Shutdown Earthquake (SSE) conditions. The analytical maximum displacements of the rack structure were 0.29 and 0.36 mm under OBE and SSE conditions, respectively. The maximum stresses were 17.9 MPa under OBE conditions and 19.6 MPa under SSE conditions; these results corresponded to 23 % and 14% of the yield strength of the applied material, respectively.

본 논문에서는 유한요소 모델을 사용한 유체-구조 해석을 통하여 원자력 발전소 임시 받침대의 내진에 대한 안전성을 평가하였다. 임시받침대는 수중에 존재하기 때문에 유체-구조 연성을 통하여 유체의 영향을 고려하였다. 유체의 영향은 구조물의 단위길이당 추가질량으로 정의하여 적용하였다. 각각의 운전기준지진(OBE)과 안전정지지진(SSE)의 설계조건을 층응답스펙트럼(Floor Response Spectrum: FRS)으로 적용하여 진동해석과 내진해석을 수행하였다. 해석된 임시받침대의 최대변위는 운전기준지진에서 0.29mm 이고, 운전정지지진에서 최대변위는 0.36 mm 이다. 최대응력은 운전 기준지진에서 17.9 MPa, 안전정지지진에서 19.6 MPa 이며, 이 값은 재료의 항복강도의 23 %, 14 % 수준이다.

Keywords

References

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