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    Evaluation of an approximate method for incorporating floating docks in harbor wave prediction models

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    etd-tamu-2005B-OCEN-Tang.pdf (1014.Kb)
    Date
    2005-11-01
    Author
    Tang, Zhaoxiang
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    Abstract
    Computer models are nowadays routinely used in harbor engineering applications. Models based on the two-dimensional elliptic mild-slope equation can simultaneously simulate refraction, diffraction, reflection, and dissipation in completely arbitrary coastal domains. However, floating structures such as floating breakwaters and docks are often encountered in the modeling domain. This makes the problem locally 3- dimensional. Hence it is problematic to incorporate a floating structure into the 2-d model. Tsay and Liu (1983) proposed a highly simplified but approximate approach to handle this problem practically. The validity of their approach is examined in detail and it is found that the actual solutions deviate considerably from the theoretical solutions, although their approximation provides results with the correct trend. Therefore, correction factors have been developed and may be used to produce more reliable results using the framework of Tsay and Liu (1983). The resulting method is applied to Douglas harbor in Alaska. The result shows that docks in the harbor distort the wave field considerably and create a reflective pattern that can affect navigation safety in some areas. Also plots are developed for the transmission coefficients for waves propagating past rectangular and cylindrical floating objects of infinite extent for a wide range of conditions encountered in practice.
    URI
    http://hdl.handle.net/1969.1/2686
    Subject
    wave
    mild-slope
    model
    equation
    floating breakwater
    dock
    marina
    harbor
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    • Electronic Theses, Dissertations, and Records of Study (2002– )
    Citation
    Tang, Zhaoxiang (2005). Evaluation of an approximate method for incorporating floating docks in harbor wave prediction models. Master's thesis, Texas A&M University. Texas A&M University. Available electronically from http : / /hdl .handle .net /1969 .1 /2686.

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