DOI QR코드

DOI QR Code

Analysis of Stem Wave due to Long Breakwaters at the Entrance Channel

  • 투고 : 2017.09.25
  • 심사 : 2017.10.31
  • 발행 : 2017.10.31

초록

Recently, a new port reserves deep water depth for safe navigation and mooring, following the trend of larger ship building. Larger port facilities include long and huge breakwaters, and mainly adopt vertical type considering low construction cost. A vertical breakwater creates stem waves combining inclined incident waves and reflected waves, and this causes maneuvering difficulty to the passing vessels, and erosion of shoreline with additional damages to berthing facilities. Thus, in this study, the researchers have investigated the response of stem waves at the vertical breakwater near the entrance channel and applied numerical models, which are commonly used for the analysis of wave response at the harbor design. The basic equation composing models here adopted both the linear parabolic approximation adding the nonlinear dispersion relationship and nonlinear parabolic approximation adding a linear dispersion relationship. To analyze the applicability of both models, the research compared the numerical results with the existing hydraulic model results. The gap of serial breakwaters and aligned angles caused more complicated stem wave generation and secondary stem wave was found through the breakwater gap. Those analyzed results should be applied to ship handling simulation studies at the approaching channels, along with the mooring test.

키워드

참고문헌

  1. Berkhoff, J. C. W.(1972), "Computation of Combined Refraction - Diffraction", Proc. 13th International Coastal Engineering Conference, pp. 741-790.
  2. Dally, W. R., Dean, R. G., and Dalrymple, R. A.(1985), "Wave Height Variation across Beaches of Arbitrary Profile", J. Geophys. Research, Vol. 90, pp. 11917-11927. https://doi.org/10.1029/JC090iC06p11917
  3. Dalrymple, R. A., Kirby, J. T., and Hwang, P. A.(1984), "Wave Diffraction due to areas of high energy dissipation", J. Waterway, Port, Coastal and Ocean Eng., Vol. 110, pp. 67-79. https://doi.org/10.1061/(ASCE)0733-950X(1984)110:1(67)
  4. Demirbilek, Z.(1994), Comparison between REFDIFS and CERC Shoal Laboratory Study, Unpublished Report, Waterways Exp. Station, Vicksburg, MS, p. 53.
  5. KMA home page, http://www.kma.go.kr/weather/observation/marine_buoy.jsp
  6. Lee, J. I. and Yoon, S. B.(2006), "Hydraulic and Numerical Experiments of Stem Waves along a Vertical Wall", J. The Korean Society of Civil Engineers, Vol. 26, Issue 4B, pp. 405-412.
  7. Lee, J. I., Kim, Y. T., and Yoon, S. B.(2007), "Stem Wave Analysis of Regular Waves using a Boussinesq Equation", J. Korean Society of Coastal and Ocean Engineers, Vol. 19, Issue 6, pp. 446-456.
  8. Li, B.(1994). A Generalized Conjugate Gradient Model for the Mild Slope Equation, Coastal Engineering, Vol. 23, pp. 215-225. https://doi.org/10.1016/0378-3839(94)90002-7
  9. Mase, H., Memita, T., Yuhi, M., and Kitano, T.(2002), "Stem waves along vertical wall due to random wave incidence", Coastal Engineering, Vol 44, Issue 4, pp. 339-350. https://doi.org/10.1016/S0378-3839(01)00038-2
  10. Mei, C. C.(1983), The Applied Dynamics of Ocean Surface Waves, John Wiley & Sons.
  11. Nwogu, O. G.(1993), "Alternative form of Boussinesq equations for nearshore wave propagation, J. Waterway, Port, Coastal and Ocean Engineering", ASCE, Vol. 119, Issue 6, pp. 618-638. https://doi.org/10.1061/(ASCE)0733-950X(1993)119:6(618)
  12. Nwogu, O. G.(1996), "Numerical prediction of breaking wave and currents with a Boussinesq model", the 25th International conference on Coastal Engineering, ICCE'96, Orlando, FL.
  13. Nwogu, O. G. and Demirbilek, Z. (2001), "BOUSS-2D: A Boussinesq wave model for Coastal Regions and Harbors", ERDC/CHL TR-01-25, USACE, WA.
  14. Panchang, V. G., Ge, W., Cushman-Roisin, B., and Pearce, B. R.(1991), "Solution to the Mild-Slope Wave Problem by Iteration, Applied Ocean Research", Vol. 13, Issue 4, pp. 187-199. https://doi.org/10.1016/S0141-1187(05)80074-4
  15. Park, H. B., Yoon, H. S., and Ryu, C. R.(2003), "A Study on the Characteristics of the Stem Wave in front of the Coastal Structure", J. Korean Society of Ocean Engineers, Vol. 17, Issue 5, pp. 25-31.
  16. Perroud, P. H.(1957), "The solitary wave reflection along a straight vertical wall at oblique incidence", Univ. of Calif. Berkeley, IER Rept. No. 99-3, p. 93.
  17. Yoo, H. S., Kim K. H., and Jung E. J.(2010), "Hydraulic Experiments of Stem Waves due to Multi-Directional Random Waves along a Vertical Caisson", J. Korean Society of Coastal and Ocean Engineers, Vol. 22, Issue 6, pp. 429-436.