Journal of the Society of Disaster Information (한국재난정보학회 논문집)

The Korean Society of Disaster Information (한국재난정보학회)
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Dynamic Parameter Estimation of a CANDU Type Containment Using Ambient Vibration Measurements

상시진동을 이용한 CANDU형 격납건물의 동적파라미터 산정

  • Choi, Sanghyun (Department of Railroad Facility Engineering, Korea National University of Transportation) ;
  • Park, Sooyong (Department of Architecture and Ocean Space, Korea Maritime University) ;
  • Hyun, Chang-Hun (Structural Systems and Site Evaluation Department, Korea Institute of Nuclear Safety) ;
  • Kim, Moon-Soo (Structural Systems and Site Evaluation Department, Korea Institute of Nuclear Safety)
  • Published : 2012.06.30
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Abstract

Dynamic parameters such as natural frequencies can provide global stiffness information of a structure, and thus be utilized in monitoring structural integrity of large structures such as a containment. To identify the dynamic parameters without interrupting normal operation, a modal analysis method based on ambient vibration measurements should be applied. In this study, dynamic parameters of the containment of Wolsong Unit 2 are identified using ambient vibration measurement data. The feasibility of the study is verified using a numerical model for the containment. From the modal analysis, dynamic parameters of the containment with acceptable correlation to analytical modes can be estimated.

고유진동수와 같은 동적파라미터는 구조물 전체의 강성에 대한 정보를 제공할 수 있어 격납건물과 같은 대형구조물의 건전성 모니터링에 유용하게 사용될 수 있다. 이러한 동적특성을 구조물의 사용성에 지장을 주지 않고 추출하기 위해서는 상시진동을 이용한 모달해석 기법의 적용이 필수적이다. 이 연구에서는 상시진동 측정자료를 이용하여 월성 2호기 격납건물의 동적파라미터를 산정하였다. 연구의 가능성은 격납건물의 수치해석모델을 이용하여 검증하였다. 월성 2호기 격납건물에서 측정된 상시진동에 대한 모달해석 결과 해석모드와 충분한 상관성을 갖는 동적파라미터를 산정할 수 있었다.

Keywords

References

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