Journal of Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회논문집)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
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Application of Wave Resonator to the Field for Controlling Secondary Undulation

부진동의 제어를 위한 공진장치의 현장적용

  • 이광호 (나고야대학교 공학연구과 사회기반공학전공) ;
  • 범성심 (한국해양대학교 토목공학과) ;
  • 김도삼 (한국해양대학교 토목공학과) ;
  • 최낙훈 (한국해양대학교 토목공학과) ;
  • 박종배 ((주) 포스코건설 토목환경사업본부 토목기술그룹) ;
  • 안성욱 ((주) 포스코건설 토목환경사업본부 토목기술그룹)
  • Received : 2012.02.06
  • Accepted : 2012.02.15
  • Published : 2012.02.29
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Abstract

In this study, to reduce the motion of the vessels resulting from resonance and secondary undulation by long-period waves, numerical review on the control performance of resonator was carried out by attaching the resonator to the established harbor of real waters. In the numerical analysis, CGWAVE MODULE of commercial software SMS(Surface water Modeling System), a finite element model based on 2-dimensional elliptical mild slope equation was applied, and through comparative analysis of the existing experiments and analysis results on the rectangular model ports, the validity of the friction coefficients in which validity and effectiveness of SMS on the secondary undulation analysis is applied was verified. Based on this, the control performance of resonator was confirmed through comparative review of the secondary undulation according to whether or not to attach the resonator to rectangular harbor. In addition, to reduce long-period motion of the moored vessels and the secondary undulation which may occur in Pohang new port, the method to move the resonant period which causes abnormal motion of the vessels to long-term one was discussed through application of the resonators with various sizes, thereby identifying the availability.

본 연구에서는 장주기파에 의한 부진동 및 공진에 의한 선박의 이상동요를 저감시키기 위하여 공진장치를 실해역의 기설 항에 부착하여 그의 제어능을 수치적으로 검토하였다. 수치해석에 2차원타원형완경사방정식에 기초한 유한요소모델인 상용소프트웨어 SMS (Surface water Modeling System)의 CGWAVE MODULE을 적용하였고, 직사각형모델항만에 대한 기존의 실험 및 해석결과와의 비교 검토로부터 부진동해석에 대한 SMS의 타당성과 유효성 및 적용한 마찰계수값의 타당성을 검증하였다. 이로부터 직사각형항만에 공진장치의 부착유무에 따른 부진동의 비교검토로부터 그의 제어능을 확인하였다. 그리고, 포항신항에서 발생될 수 있는 부진동 및 계류선박의 장주기동요를 감쇠시키기 위하여 여러 크기의 공진장치를 적용하여 선박의 이상동요를 발생시키는 공진주기를 보다 장주기측으로 이동시키는 방안을 검토하였고, 이로부터 그의 유용성을 확인할 수 있었다.

Keywords

References

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