풍력에너지저널 (Journal of Wind Energy)

  • 제14권3호
  • /
  • Pages.91-99
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  • 2023
  • /
  • 2093-5099(pISSN)
  • /
  • 2733-9467(eISSN)
한국풍력에너지학회 (Korea Wind Energy Association)
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상시계측을 통한 해상기상탑의 동적특성 평가

Estimation of Dynamic Characteristics of an Offshore Meteorological Tower using Ambient Measurements

  • 이계희 (목포해양대학교, 해양건설공학과) ;
  • 레 꾸억 끄영 (목포해양대학교, 해양시스템공학과) ;
  • 곽대진 (KST(주))
  • Gyehee Lee ;
  • Le Quoc Cuong ;
  • Daejin Kwag
  • 투고 : 2023.06.20
  • 심사 : 2023.08.17
  • 발행 : 2023.09.30
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초록

In research conducted on a southwestern Korean offshore meteorological tower, acceleration datasets were gathered over half a year with time-history sensors. To enhance data credibility, a parallel measurement system was used for verification. A model of the tower was configured using beam elements, and with modifications accounting for added stiffness from auxiliary structures. Ground interactions were considered as calibrated springs based on soil layer properties. The tower's dynamic attributes and mass sensitivity were discerned using eigenvalue analysis. The structural natural frequency was consistent, with variations primarily due to new equipment adding approximately 1400 kgs. With free vibration damping assumptions, a damping ratio of roughly 1 % was derived.

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과제정보

본 과제(결과물)는 2023년도 교육부의 재원으로 한국연구재단의 지원을 받아 수행된 지자체-대학 협력기반 지역혁신 사업의 결과입니다. (2021RIS-002)

참고문헌

  1. Jung, H. S., Lee, M. J., Yoo, M. T., and Lee, I. W. 2020, "Response 
Dominant Frequency Analysis for Scour Safety Evaluation of Railroad Piers", Journal of the Korean Geotechnical Society, Vol.36, No. 11, pp.88-95.(in Korean)
  2. Yi, J. H., Park, J. S., Han, S. H. and Lee, K. S., 2012,Long Term Monitoring of Dynamic Characteristics of a Jacket-Type Offshore Structure Using Dynamic Tilt Responses and Tidal Effects on Modal Properties, Journal of KSCE A, Vol. 32, No. 2A, pp. 97-108. (in Korean)
  3. Yi, J. H., Min, I. K. and Shim, J. S., 2020, Analysis of Structural Dynamic Characteristics of Ieodo Ocean Research Station Using Vibration Measurement Data , Journal of Coastal Disaster Prevention, Vol. 7, No. 2, pp. 105-115. (in Korean)
  4. Hillis A.J. and Courtney C.R.P 2010, Structural health monitoring of fixed offshore structures using the bicoherence function of ambient vibration measurements. Journal of sound and vibration, Vol.330, pp. 1141-1152
  5. Moon, C. J., Chang, Y. H.,Park, T. S., Moon, S. J., Joo, H. J., Kwon, O. S., Kwag, D. J. and Jeong, G. S., 2014, A Study on Design of Of fshore Meteorological Tower , Journal of the Korean Solar Energy Society, Vol. 34, No. 2, pp. 60-65. (in Korean)
  6. KST Inc., 2021, Structural Design Report for Shinan Punam Project.(in Korean)
  7. Simulia, 2014, ABAQUS User's Manual
  8. Zhu, B., Byrne, B. W. and Houlsby, G. T., 2013, Long-Term Lateral Cyclic Response of Suction Caisson Foundations in Sand, Journal of Geotechnical and Geoenvironmental Engineering, Vol.139, Issue 1.