유공벽이 설치된 부유체 동요 평가를 위한 주파수 영역 해석
Frequency-Domain Analysis for Motion of Floating Structures with Perforated Wall
0
조회
0
다운로드
3
인용
0
참고문헌
키워드
초록
해상 산업시설을 중심의 부유식 구조물 수요가 생활 밀접형 시설로 점차 확대됨에 따라, 부유 구조물의동요를 저감하기 위한 기술 필요성이 대두되고 있다. 본 연구는 부유체 외부에 유공벽이 설치된 부유식 구조물을제시하고, 규칙파 및 불규칙파 조건에서의 주파수 영역 해석을 통해 해당 구조물의 응답을 조사하였다. 제안된 구조물은 내부 부유체와 유공벽이 포함된 외부 부유체가 결합된 형태로, 유공률별(0~30%) 해석 모델을 생성해 부유체 중심점과 가장자리에서의 상하 및 회전 동요가 비교되었다. 해석 결과는 유공벽의 유공률 증가를 통해 부유체의상하 및 회전 동요를 저감할 수 있음을 보여주었다. 또한 제안된 부유체를 사용함으로써 무유공 부유체 대비 규칙파와 불규칙파 조건에서 각각 10%, 2% 내외의 응답 감소 효과가 나타남을 확인할 수 있었다.
Abstract
As increasing demands for a floating structure expanded from offshore industry facilities to living facilities, it has emerged that necessity of techniques to reduce motions of a floating structure. This study pres ent a floating structure with porosity on the outer surface of the floater. Under each regular and irregular wave, responses of the floater was investigated in frequency domain. The proposed structure is composed of inner and outer floaters, which are connected to each other and the outer wall is perforated, and the heave and the pitch of floaters with different perforation rates (0~30%) were compared with at both the center and the edge. The results showed that pitch responses can be decreased by increasing of perforation rate of the floater. Comparing with responses of the non-perforated floater, those of the proposed floating structure were reduced to above 10% and 2%, respectively for regular and irregular wave conditions
참고문헌 (17)
- Chen, M., "Effects of gap resonance on the hydrodynamics and dynamics of a multi-module floating system with narrow gaps", Journal of Marine Science and Engineering, 9, pp.1256~ (2021)
- Cho, H. Y., "Parameter estimation and fitting error analysis of the representative spectrums using the wave spectrum off the Namhangjin, East Sea", Journal of Korean Society of Coastal and Ocean Engineers, 32(5), pp.363~371 (2020)
- Han, M., "Modelling wide perforated breakwater with horizontal slits using Hybrid-BEM method", Ocean Engineering, 222, pp.108630~ (2021)
- Han, M., "Efficiency and wave run-up of porous breakwater with sloping deck", Journal of Marine Science and Engineering, 10, pp.1896~ (2022)
- Hur, D. -S., "Reflection and hydraulic characteristics inside two-chamber vertical slit caisson in 3-D oblique wave field", Journal of Ocean Engineering and Technology, 28(3), pp.227~235 (2014)
- IPCC, "Climate Change 2007: The Physical Science Basis. Contribution of Working Group Ⅰ to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change", pp.3~18 (2007), Cambridge Univ. Press
- Kee, S. T., "Resonance and response of the submerged dual buoy", porous-membrane breakwaters in oblique seas, 2001, pp.15(2), 22~32
- Kim, J., "Study on proper position of wave gauges by analyzing wave field around a wave energy converter", Journal of the Korean Society for Marine Environment and Energy, 24(1), pp.9~19 (2021)
- KIMST, "KIMST Insight", 14~17 (2023)
- Kim, Y. T., "Hydraulic experiments on reflection coefficients for perforated wall caisson with rock fill", Journal of Korean Society of Coastal and Ocean Engineers, 31(6), pp.403~408 (2019)
- Kim, Y. T., "Estimation of optimal slit length of perforated wall below still water level : Single chamber condition", Journal of Korea Water Resources Association, 46(4), pp.327~334 (2014)
- Ko, K., "Wave pressure characteristics of pile-Supported breakwater with the horizontal slit walls", KSCE Journal of Civil and Environmental Engineering Research, 35(1), pp.119~128 (2015)
- Lee, D., "Efficiency Review of Floating Breakwater Through Hydraulic Model Experiment", Master, pp.2023
- Lee, J. -I., "Experiments for side wall effects of a perforated structure under oblique incident waves", KSCE Journal of Civil and Environmental Engineering Research, 33(6), pp.2343~2350 (2013)
- Park, M. S., "Hydrodynamic response analysis of hybrid floating structure according to length of damping plate", Journal of Korean Society of Coastal and Ocean Engineers, 34(6), pp.275~289 (2022)
- Yoon, J. -S., "Experimental study on functional improvement of porous floating breakwaters", Proc. Korea Water Resources Assoc. Conf, pp.44~48 (2011)
- Yoon, J. -S., "Hydraulic experiment on floating breakwater mounted wavepower generation", Proc. Korea Water Resources Assoc. Conf., pp.214~ (2021)