Development of an Analysis Model for UPS System of LNG Receiving Terminal Facilities

Seung-Kyu Kook; Seong-Kyeong Hong; Joon-Ho Kim; Won-Mog Choi; Young-Ho Park

doi:10.7734/COSEIK.2016.29.6.539

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2016 Vol.29, Issue 6 Preview Page Next Page

Development of an Analysis Model for UPS System of LNG Receiving Terminal Facilities 천연가스 생산기지 내 UPS시스템의 해석모델 개발

2016. pp. 539-545

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Abstract

UPS system in the liquefied natural gas(LNG) receiving terminal is one of the fundamental equipment that need to sustain operation during earthquake. In this study, modal identification test of UPS system was performed based on IEEE Std. 693-2005 and natural frequencies and modal damping, mode shapes had been identified. In addition, tri-axial time history test was performed to check the behavior and stress of the equipment during earthquake. Eigenvalue analysis was performed and analysis model was modified by reflecting the results of the test. Static analysis by dead weight and response spectrum analysis were performed to compare the combined stresses with the stress results of test. Dynamic characteristics and combined stresses under seismic load condition of the improved analysis model were similar to the test results and in this regard the compatibility was proved.

천연가스 생산기지 내의 UPS시스템은 지진 시에도 기능성을 유지해야 하는 주요 설비 중 하나이다. 이 연구에서는 IEEE Std 693-2005 기준을 토대로 대형 진동대를 이용한 UPS시스템의 동특성 탐색시험을 수행하고 기기의 고유진동수와 모드감 쇠, 모드형상 등을 도출하였다. 또한, 3축 시간이력시험을 통해 지진 시 기기의 거동 및 부재의 발생응력을 확인하였다. 유한 요소모델을 생성하여 고유치해석을 수행하고 이를 동특성 탐색시험의 시험값과 비교, 분석하여 해석모델을 개선하고 자중해 석과 응답스펙트럼 해석을 수행하여 조합응력을 3축 시간이력시험의 시험값과 비교하였다. 개선된 유한요소 해석모델의 동 특성과 조합응력이 시험 결과와 유사함을 입증하여 개선된 UPS시스템 해석모델의 적합성을 제시하였다.

키워드

UPS시스템

지진

동특성 탐색시험

3축 시간이력시험

고유치해석

응답스펙트럼 해석

조합응력

References

REFERENCES

AISC, American Institute of Steel Construction, Allowable Stress Design and Plastic Design, Specification for Structural Steel Buildings (1989)

IEEE, The Institute of Electrical and Electronics Engineers, IEEE Std 693-2005, IEEE Recommended Practice for Seismic Design of Substations (2006)

JH Jeon, SG Cho, YW Jeong and SN Baek, J. Earthq. Eng. Soc. Korea, Verification of Seismic Adequacy for Outlier Cabinets in Korean Operating Power Plant; 99-106 (2008)

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midas NFX Analysis Manual, MidasIT (2010)

Information

Publisher :Computational Structural Engineering Institute of Korea
Publisher(Ko) :한국전산구조공학회
Journal Title :Journal of the Computational Structural Engineering Institute of Korea
Journal Title(Ko) :한국전산구조공학회 논문집
Volume : 29
No :6
Pages :539-545
Received Date : 2016-09-28
Revised Date : 2016-10-11
Accepted Date : 2016-10-12
DOI :https://doi.org/10.7734/COSEIK.2016.29.6.539

Journal of the Computational Structural Engineering Institute of Korea ISSN:1229-3059(Print) 2287-2302(Online) 한국전산구조공학회 논문집

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REFERENCES