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

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
권호 표지
DOI QR코드

DOI QR Code

Time Response Analysis of Caissons by Installing New Caisson on Existing Caisson Breakwater in Irregular Wave Condition

기존 케이슨방파제에 신규 케이슨 추가설치에 따른 불규칙파 조건에서 케이슨들의 시간응답 평가

  • Min Su, Park (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Young Taek, Kim (Department of Hydro Science and Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Sangki, Park (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology) ;
  • Jiyoung, Min (Department of Structural Engineering Research, Korea Institute of Civil Engineering and Building Technology)
  • 박민수 (한국건설기술연구원 구조연구본부) ;
  • 김영택 (한국건설기술연구원 수자원하천연구본부) ;
  • 박상기 (한국건설기술연구원 구조연구본부) ;
  • 민지영 (한국건설기술연구원 구조연구본부)
  • Received : 2022.11.15
  • Accepted : 2022.12.05
  • Published : 2022.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

The design and the construction were carried out by installing new caissons on the back or the front of existing caissons to increase the structural stability of caisson breakwaters. In this study, we used the ANSYS AQWA program to analyze the wave forces acting on individual caissons according to the effects of wave-structure interaction when new caissons were additionally installed on existing caisson breakwaters. The wave force characteristics acting on the individual caisson were analyzed according to the distance among caissons in frequency domain analysis. In addition, the dynamic wave force characteristics were closely examined on the basis of the frequency at which the unusual distribution of wave forces occurs in irregular wave conditions using time domain analysis.

기존 케이슨방파제의 전면 또는 후면에 추가로 케이슨을 설치하여 구조물의 안정성을 향상시키기 위한 설계 및 시공사례가 보고되고 있다. 본 연구에서는 상용프로그램인 ANSYS AQWA를 이용하여 신규 케이슨이 추가로 설치되는 경우 입사하는 파랑과 케이슨들간의 상호작용 영향에 의해 개별 케이슨에 작용하는 파력 특성을 분석하였다. 앞뒤 케이슨간의 간격변화에 따른 개별 케이슨에 작용하는 파력 특성을 주파수영역에서 수치해석을 수행하였다. 그리고 특이한 파력분포 특성이 발생되는 주파수에 대해서는 불규칙파 조건에서의 시간영역 수치해석을 통해 개별 케이슨에 작용하는 동적파력 특성을 면밀하게 검토하였다.

Keywords

Acknowledgement

본 연구는 해양수산과학기술진흥원의 안전한 항만 구축 및 관리기술 개발사업인 "재해 안전항만 구축 기술개발(20180323)" 과제 및 ICT 기반 항만 인프라 스마트 재해 대응 기술개발 사업인 "항만 인프라 재해 및 노후화 대응 스마트 유지보수 기술개발(20210659)" 과제를 통해 수행된 연구결과 중 일부임을 밝히며, 연구비 지원에 감사드립니다.

References

  1. Bunnik, T., Pauw, W. and Voogt, A. (2009). Hydrodynamic analysis for side by side offloading, In 19th International Offshore and Polar Engineering Conference, Osaka, Japan.
  2. Chen, X.B. (2005). Hydrodynamic analysis for offshore LNG terminals, Proceeding of the 2nd International Workshop on Applied Offshore Hydrodynamics, Rio De Janeiro, Brazil.
  3. Chen, M., Guo, H., Wang, R., Tao, R. and Cheng, N. (2021). Effect of gap resonance on the hydrodynamics and dynamics of a multi-module floating system with narrow gaps. Journal of Marine Science and Engineering, 9(11), 1-29. https://doi.org/10.3126/jsce.v9i9.46289
  4. Fournier, J.R., Naciri, M. and Chen, X.B. (2006). Hydrodynamics of two side by side vessels experiments and numerical simulations, In 16th International Offshore and Polar Engineering Conference, San Francisco, California, USA.
  5. Ganesan, T.S. and Sen, D. (2016). Time domain simulation of side by side floating bodies using a 3D numerical wave tank approach. Applied Ocean Research, 58, 189-217. https://doi.org/10.1016/j.apor.2016.03.014
  6. Pauw, W.H., Huijsmans, R.H.M. and Voogt, A. (2007). Advances in the hydrodynamics of side by side moored vessels, In 26th International Conference on Offshore Mechanics and Arctic Engineering, San Diego, California, USA, 597-603.
  7. Park, M.S. (2019). Characteristics of wave forces by installation of new circular caisson on the back of old circular caisson. Journal of Korean Society of Coastal and Ocean Engineers, 31(6), 395-402 (in Korean). https://doi.org/10.9765/KSCOE.2019.31.6.395
  8. Park, M.S. (2020). Wave structure interaction by installation of new circular caissons on old circular caisson breakwater. Journal of Korean Society of Coastal and Ocean Engineers, 32(5), 307-321 (in Korean). https://doi.org/10.9765/KSCOE.2020.32.5.307
  9. Park, M.S. (2021). Interaction effect between caissons by installation of new caisson on existing caisson breakwater in second order stokes wave condition. Journal of Korean Society of Coastal and Ocean Engineers, 33(6), 345-356 (in Korean). https://doi.org/10.9765/KSCOE.2021.33.6.345
  10. Park, M.S., Kim, Y.T., Park, S. and Min, J. (2022). Interaction analysis between waves and caissons by damping zone effect for installing new caisson on old caisson breakwater. Journal of Korean Society of Coastal and Ocean Engineers, 34(5), 156-168 (in Korean). https://doi.org/10.9765/KSCOE.2022.34.5.156
  11. Watai, R., Dinoi, P., Ruggeri, F., Souto-Iglesias. and Simos, A. (2015). Rankine time domain method with application to side by side gap flow modeling. Applied Ocean Research, 50, 69-90. https://doi.org/10.1016/j.apor.2014.12.002