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상자형 어초의 흐름 및 구조응답 특성

Flow and Structural Response Characteristics of a Box-type Artificial Reef

  • 김동하 (부경대학교 해양공학과) ;
  • 우진호 (부경대학교 해양공학과) ;
  • 나원배 (부경대학교 해양공학과) ;
  • 윤한삼 (부경대학교 해양산업개발연구소)
  • Kim, Dongha (Department of Ocean Engineering, Pukyong National University) ;
  • Woo, Jinho (Department of Ocean Engineering, Pukyong National University) ;
  • Na, Won-Bae (Department of Ocean Engineering, Pukyong National University) ;
  • Yoon, Han-Sam (Research Center for Ocean Industry and Development, Pukyong National University)
  • 투고 : 2013.12.13
  • 심사 : 2014.05.20
  • 발행 : 2014.06.30

초록

콘크리트와 강재로 제작된 상자형 어초의 흐름응답과 구조응답 수치해석을 수행하였다. 흐름해석으로부터 대상 어초의 후류역과 항력계수를 평가하였으며 압력장을 외력으로 재하하여 구조해석을 수행하고 대상어초의 응력과 변형을 평가하였다. 후류역 평가를 위하여 후류체적 개념을 도입하였고 이로부터 유향과 유속에 따른 후류역의 변동을 정량적으로 제시하였다. 해석결과로부터 흐름응답은 유향에 지배적인 영향을 받으나 유속과는 무관하며 구조응답은 유향과 유속에 영향을 받지만 그 크기가 매우 작고, 단일어초의 최적 설치 조건(유향 $30^{\circ}$)에서 대상어초의 후류체적은 공용적의 3.52배임을 알 수 있었다.

We carried out flow and structural response analysis of a box-type artificial reef (AR), which is made of concrete and structural steel. From the flow analysis, the wake region and drag coefficient were evaluated and accordingly, the structural analysis was performed to evaluate the stress and deformation of the target reef by considering the pressure field obtained from the flow analysis. The concept of wake volume was presented to quantitatively estimate the wake region and its variation according to flow direction and velocity. From the results, it is shown that the flow responses are only sensitive to the flow direction; the structural responses are sensitive to both of the flow velocity and direction although the magnitudes are negligible; and the wake volume became 3.52 times the AR volume with an optimum installation condition ($30^{\circ}$, flow direction) of the target unit.

키워드

참고문헌

  1. ANSYS-Inc. (2009). ANSYS CFX, Release 12.1.
  2. Baine, M. (2001). Artificial Reefs: A Review of their Design, Application, Management, and Performance, Ocean & Coastal Management, 44, 241-259. https://doi.org/10.1016/S0964-5691(01)00048-5
  3. Hong, S.W. and Okamoto, M. (1998). The Behavioral Character of Fishes Near the Artificial Reefs Setted Up Submersible Artificial Sea - Floor, Bulletin of the Korean Society of Fisheries Technology, 34(4), 378-385 (in Korean).
  4. Hwang, D.J., Park, J.S. and Lee, Y.W. (2004). Estimation of Fish School Abundance by Using an Echo Sounder in an Artificial Reef Area, Journal of the Korean Fisheries Society, 37(3), 249-254 (in Korean). https://doi.org/10.5657/kfas.2004.37.3.249
  5. Jensen, A. (2002). Artificial Reefs of Europe: Perspective and Future, ICES Journal of Marine Science, 59, S3-S13. https://doi.org/10.1006/jmsc.2002.1298
  6. Jeon, Y.H., Lee, G.S., Kang, Y.K. and Ryu, C.R. (2007). An Experimental Study for the Falling Test and Upwelling Effect of the Artificial Upwelling Structures in Flow Field, Journal of Ocean Engineering and Technology, 21(4), 21-27 (in Korean).
  7. Kaiser, M.J. and Kasprzak, R.A. (2008). The Impact of the 2005 Hurricane Season on the Liousuana Artificial Reef Program, Marine Policy, 32, 956-967. https://doi.org/10.1016/j.marpol.2008.02.006
  8. Kim, C.G., Oh, T.G., Suh, S.H., Kim, D.K., Kim, B.G. and Choi, Y.S. (2009a). Review of Stability Calculation of an Artificial Reef in the Breaking Wave Zone of Coastal Waters, Journal of the Korean Society of Marine Engineering, 33(6), 965-974 (in Korean). https://doi.org/10.5916/jkosme.2009.33.6.965
  9. Kim, D.K., Lee, J.Y., Suh, S.H., Kim, C.G., Cho, J.K. and Cha, B.Y. (2009b). Scouring and Accumulation by Tidal Currents around Cubic Artificial Reefs installed at Geogeom Waterway, Journal of the Korean Society of Marine Engineering, 33(8), 1275-1280 (in Korean). https://doi.org/10.5916/jkosme.2009.33.8.1275
  10. Kim, D.K., Suh, S.H., Cho, J.K., Kim, C.G., Choi, I.H. and Kim, B.S. (2010). Settlement Characteristics of Square Reefs Installed on Soft Seafloor Ground, Journal of the Korean Society of Marine Engineering, 34(1), 163-167 (in Korean). https://doi.org/10.5916/jkosme.2010.34.1.163
  11. Kim, H.S., Kim, C.G., Na, W.B. and Kim, J.K. (2008). Chemical Degradation Characteristics of Reinforced Concrete Reefs in South Korea, Ocean Engineering, 35, 738-748. https://doi.org/10.1016/j.oceaneng.2008.02.003
  12. Kim, H.S., Kim, C.G., Seo, Y.K. and Kim, G.Y. (2005). Subsidence Characteristics of Artificial Reefs using Sediment Grain Size and Shear Strength, Bulletin of the Korean Society of Fisheries Technology, 41(1), 2005, 46-53 (in Korean). https://doi.org/10.3796/KSFT.2005.41.1.046
  13. Kim, H.S., Lee, J.W., Kim, J.R. and Yoon, H.S. (2009c). Estimation of Countermeasures and Efficient Use of Volume of Artificial Reefs Deployed in Fishing Grounds, Journal of the Korean Society for Marine Environmental Engineering, 12(3), 181-187 (in Korean).
  14. Kim, H.S., Lee, J.W., Won, S.H., Kim, J.R. and Yoon, H.S. (2009d). Estimation of Efficient Use of Volume and Facility Volume Distribition of Artificial Reefs deployed in the Busan Sea Region, Journal of the Korean Society for Marine Environmental Engineering, 12(4), 255-263 (in Korean).
  15. Kim, H.T. (2001). A Study of Artificial Reef Subsidence in Unsteady Flow Field, Journal of Ocean Engineering and Technology, 15(2), 33-38 (in Korean).
  16. Kim, S.C. and Shin, H.O. (2001). Research on the Geographic Characteristics of the Sea Bed and the Distribution of Artificial Reefs in Jaran Bay, Bulletin of the Korean Society of Fisheries Technology, 37(3), 214-222 (in Korean).
  17. Langhamer, O., Wilhelmsson, D. and Engstrm, J. (2009). Artificial Reef Effect and Fouling Impacts on Offshore Wave Power Foundations and Buoys - a Pilot Study, Estuarine, Coastal and Shelf Science, 82, 426-432. https://doi.org/10.1016/j.ecss.2009.02.009
  18. Liu, T.L. and Su, D.T. (2013). Numerical Analysis of the Influence of Reef Arrangement of Artificial Reef Flow Fields, Ocean Engineering 74, 81-89. https://doi.org/10.1016/j.oceaneng.2013.09.006
  19. Liu, Y., Zhoa, Y., Dong, G., Guan, C., Yui, Y. and Xu, T.J. (2013). A Study of the Flow Field Characteristics around Star-shaped Artificial Reefs, Journal of Fluids and Structures, 39, 27-40. https://doi.org/10.1016/j.jfluidstructs.2013.02.018
  20. Park, H.H., Shin, J.K., Kim, J.O., Park, S.Y, Kim, H.S., Lim, D.H., Park, Y.C., Cho, S.H., Hong, S.H., Lee, J.W. and Ahn, B.G. (2003). An Effect on Fisheries Resources Enhancement of Hollow Jumbo Structure and a Search for Artificial Reefs by Side Scan Sonar in the Western Sea of Korea, Bulletin of the Korean Society of Fisheries Technology, 39(3), 230-238 (in Korean). https://doi.org/10.3796/KSFT.2003.39.3.230
  21. Park, S.B., Hong, C.H., Kim, S.K. and Kim, K.H. (2007). Experimental Study on Development of Artificial Fishing Reefs Using Environmental-Friendly Sulfur Concrete, Journal of Ocean Engineering and Technology, 21(3), 58-64 (in Korean).
  22. Pickering, H. and Whitmarsh, D. (1997). Artificial Reefs and Fisheries Exploitation: a Review of the 'Attraction versus Production' Debate, the Influence of Design and Its Significance for Policy, Fisheries Research, 31, 39-59. https://doi.org/10.1016/S0165-7836(97)00019-2
  23. Ryu, C.R. and Kim, H.J. (1994). A Study on the Characteristics of Wave Forces on Artificial Reefs, Bulletin of the Korean Fisheries Society, 27(5), 605-612 (in Korean).
  24. Ryu, C.R., Kim, H.J., Lee, H.S. and Shin, D.I. (1997). Structural and Layout Design Optimization of Ecosystem Control Structures (2), Journal of the Korean Fisheries Society, 30(1), 139-147 (in Korean).
  25. Sawaragi, T. (1995). Coastal Engineering - Waves, Beaches, Wave- Structure Interactions, Elsevier.
  26. Sohn, B.K., Lee, J.W., Yi, B.H. Yoon, H.S. (2010). Hydraulic Characteristics of Two Types of Pyramid Shaped Artificial Reefs, Journal of the Korean Society of Marine Engineering, 34(5), 725-734 (in Korean). https://doi.org/10.5916/jkosme.2010.34.5.725
  27. Sohn, B.K., Yi, B.H. and Yoon, H.S. (2011). Hydraulic Characteristics of Train Carriage Artificial Reef in Wave and Current Field Conditions, Journal of the Korean Society of Marine Engineering, 35(1), 108-117 (in Korean). https://doi.org/10.5916/jkosme.2011.35.1.108
  28. Suh, S.H., Lee, Y.K., Kim, C.G., Kim, D.K. and Park, S.W. (2010). A Study on the Scour Characteristics around Artificial Reefs, Journal of the Korean Society of Marine Engineering, 34(4), 567-574 (in Korean).
  29. Suh, S.H., Lee, Y.K., Lee, I.H. and Kim, D.K. (2007). Field Investigation on the Efficiency of the Artificial Steel Reefs, Journal of Ocean Engineering and Technology, 21(5), 61-67 (in Korean).
  30. Yang, C.K. and Kim, H.J. (2000). A Study on the Characteristics of the Flow around a Sunken Vessel, Journal of Ocean Engineering and Technology, 14(4), 9-16 (in Korean).
  31. Yoon, S.J. and Kim, H.T. (2001). A Study of Artificial Reef Subsidence in Unsteady Flow-Wave Field, Journal of Ocean Engineering and Technology, 15(3), 28-34 (in Korean).

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  3. Wake Region Estimation of Artificial Reefs using Wake Volume Diagrams vol.28, pp.4, 2016, https://doi.org/10.13000/JFMSE.2016.28.4.1042
  4. Wake Volume Characteristics Considering Artificial Reef Canyon Intervals Constructed by Flatly Distributed Artificial Reef Set vol.30, pp.3, 2016, https://doi.org/10.5574/KSOE.2016.30.3.169
  5. Efficiency Index Diagram for Wake Region Evaluation of Artificial Reefs Facilitated for Marine Forest Creation vol.2, pp.4, 2016, https://doi.org/10.5574/JAROE.2016.2.4.169
  6. Placement Models of Marine Forest Artificial Reefs to Increase Wake Region Efficiency vol.30, pp.1, 2018, https://doi.org/10.13000/JFMSE.2018.02.30.1.132