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Filtering by: Alternative title ssim Technical note no. F-6 Remove constraint Alternative title ssim: Technical note no. F-6 Degree Name Master of Ocean Engineering (M.Oc.E.) Remove constraint Degree Name: Master of Ocean Engineering (M.Oc.E.)

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  • Simulation of random, nonlinear wave forces on a circular cylindrical pile

    Creator:
    Tuah, Hang
    Abstract:
    Two types of linear random wave simulation methods are investigated; viz., (1) Deterministic Spectral Amplitude (DSA) and (2) Nondeterministic Spectral Amplitude (NSA). These linear simulations are extended to second-order in a perturbation expansion in the frequency domain by utilizing a Fast Fourier Transform (FFT). The nonlinear interaction matrix for waves...
    Resource Type:
    Masters Thesis
    Full Text:
    -valued amplitudes, F(n), defined by Eq. (2.5.2) are no longer orthogonal, and the series expansion

  • Organizational factors in the reliability assessment of offshore systems

    Creator:
    Biondi, Esteban L.
    Abstract:
    The reliability of ocean systems is dependent on organizational factors. It has been shown that low probability / high consequence system failures are overwhelmingly induced by organizational factors. However, no methodology is yet widely accepted for the evaluation of this phenomenon or its accurate quantification. A qualitative complementary approach is...
    Resource Type:
    Masters Thesis
    Full Text:
    , no methodology is yet widely accepted for the evaluation of this phenomenon or its accurate

  • Design and implementation of a physical model for Keystone Harbor, WA

    Creator:
    Richmond, J. Brady
    Abstract:
    Strong tidal currents experienced at Keystone Harbor, WA, have caused navigational hazards and disrupted ferry service in the area. This thesis presents details of the design, construction and implementation of a large scale physical model of Keystone Harbor used to evaluate the effectiveness of proposed jetty design alternatives to improve...
    Resource Type:
    Masters Thesis
    Full Text:
    safety. No adverse impacts were observed on the adjacent beaches. Redacted for privacy © Copyright

  • Sand waves in a pristine estuary

    Creator:
    Baliga, B. R. (B. Ravindranath)
    Abstract:
    The stochastic and the Fourier theories for sand waves developed by Lee(11) and Hino(6), respectively, for unidirectional flows are extended in order to estimate the rate of sediment turnover (RST) under oscillatory flows in the South Slough estuary, Coos Bay, Oregon. Data were collected by a mechanical and a sonic...
    Resource Type:
    Masters Thesis
    Full Text:
    spectrum for Record No. 6 34 12. Sand wave amplitude spectrum for Record No. 7 35 1. Summary of Data from

  • Hydrodynamic forces on a horizontal cylinder under waves and current

    Creator:
    Teng, Chung-chu
    Abstract:
    By assuming the linear superposition principle to be valid, the hydrodynamic forces on a horizontal cylinder under waves and current are examined. In this study, towing a cylinder in waves is used to simulate a cylinder under waves and current. The experimental technique is proved valid through theoretical considerations and...
    Resource Type:
    Masters Thesis
    Full Text:
    heights are examined. The results show there is no evident difference in force prediction if the related

  • Pollution and tidal flushing predictions for Oregon's estuaries

    Creator:
    Choi, Byungho
    Abstract:
    The overriding goal of this study was to provide first order estimates of dilution and tidal flushing of waste discharges released hypothetically into various Oregon estuaries during critical low flows and tides. Causal relationships between discharged wastes and subsequent estuarine response were studied. Various approaches to determine the assimilative capacity...
    Resource Type:
    Masters Thesis
    Full Text:
    salinity distribution in Yaquina River. 45 6 Cross section of an overmixed estuary showing net circulation

  • Offshore controls on nearshore circulation

    Creator:
    Long, Joseph W.
    Abstract:
    The rip current field resulting from the transformation of surface gravity waves over offshore submarine canyons is studied. Employing a wave transformation model and a wave-induced circulation model over observed bathymetry we find that rip current circulation cells exist with alongshore spacing of O(1OOm) even though the nearshore bathymetry displayed...
    Resource Type:
    Masters Thesis
    Full Text:
    bathymetry displayed no variations at these length scales. Further, these simulations display skill in

  • The static and cyclic pullout behavior of plate anchors in fine saturated sand

    Creator:
    Petereit, Ralph A.
    Abstract:
    Anchors resistant to tensile loads are commonly used in civil engineering practice. Anchors in the marine environment are most frequently used for the mooring of vessels. Only recently, with the expansion of the offshore industry, has the need to develop more reliable anchor systems become necessary. Embedded plate anchors are...
    Resource Type:
    Masters Thesis
    Full Text:
    Circular Plate (f = 0.5 Hz) 133 6-9 Change in Magnitude of the Peak-to-Peak Pore Pressure Response Below

  • Three applications of wave measurements in coastal engineering

    Creator:
    McGehee, David D.
    Resource Type:
    Masters Thesis
    Full Text:
    .......................... 6 2. Aerial view of southwestern coast of Guam ............................ 7 3. Agat Harbor

  • The analysis of directional wave spectra from current and pressure measurements

    Creator:
    Lin, Li-hwa
    Abstract:
    Directional wave spectra have been estimated in this study based upon simultaneous subsurface measurements of current and pressure. Two previously developed methods, the stochastic and deterministic approaches, have been reviewed and restudied. It is demonstrated by means of the Correlation Theorem that the stochastic and deterministic approaches are, under certain...
    Resource Type:
    Masters Thesis
    Full Text:
    (Brighan, 1974) of the 6 function is F(a)6(a'-a)da= F(a') (2.21) where F(a) is an analytic function. The