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  • Deterministic and stochastic control of nonlinear oscillations in ocean structural systems

    Creator:
    King, Paul E.
    Abstract:
    Complex oscillations including chaotic motions have been identified in off-shore and submerged mooring systems characterized by nonlinear fluid-structure interactions and restoring forces. In this paper, a means of controlling these nonlinear oscillations is addressed. When applied, the controller is able to drive the system to periodic oscillations of arbitrary periodicity....
    Resource Type:
    Dissertation
    Full Text:
    advisor, Professor Solomon C. S. Yim, for his obvious dedication to the quest for scientific knowledge

  • Stochastic analysis of a nonlinear ocean structural system

    Creator:
    Lin, Huan
    Abstract:
    Stochastic analysis procedures have been recently applied to analyze nonlinear dynamical systems. In this study, nonlinear responses, stochastic and/or chaotic, are examined and interpreted from a probabilistic perspective. A multi-point-moored ocean structural system under regular and irregular wave excitations is analytically examined via a generalized stochastic Melnikov function and Markov...
    Resource Type:
    Dissertation
    Full Text:
    . Abstract approved: Solomon C.S. Yim Stochastic analysis procedures have been recently applied to

  • Experimental analysis of a nonlinear moored structure

    Creator:
    Narayanan, Suchithra
    Resource Type:
    Dissertation
    Full Text:
    of a Nonlinear Moored Structure. Abstract approved: Solomon C.S. Yim, Ph.D. Complex nonlinear and

  • Stability analysis of nonlinear coupled barge motions

    Creator:
    Nakhata, Tongchate
    Abstract:
    The present research investigates nonlinear barge motions through analyses of coupled multi-degree-of-freedom (MDOF) deterministic and stochastic models. Roll-Heave-Sway and other lower-ordered models are developed to predict the nonlinear motions and analyze the stability of a class of ship-to-shore cargo barges. The governing equations of motion contain coupled rigid body Roll-Heave-Sway...
    Resource Type:
    Dissertation
    Full Text:
    Analysis of Nonlinear Coupled Barge Motions Abstract approved Solomon C.S. Yim The present research

  • Stochastic analysis of the nonlinear response transition behavior of an ocean system

    Creator:
    Yuk, Dongjun
    Abstract:
    The nonlinear response of an ocean system subjected to random excitations can exhibit very complex dynamic behaviors including jump phenomena and coexistence of attractors. In this study, the stochastic system response behavior of a simple (Duffing) oscillator under narrow-band random excitations is first examined in the subharmonic resonance region. A...
    Resource Type:
    Masters Thesis
    Full Text:
    I would like to express my sincere gratitude to my major advisor, Prof. Solomon C.S. Yim, for his

  • Chaotic response and stability of offshore equipment

    Creator:
    Lin, Huan
    Abstract:
    This investigation deals with the chaotic rocking response and overturning stability of offshore equipment subjected to base excitations due to wave-induced motions of the supporting compliant offshore structural system. The equipment compliant structural system is modelled as a free-standing rigid object subjected to horizontal and vertical base accelerations. Three of...
    Resource Type:
    Masters Thesis
    Full Text:
    : Redacted for privacy Dr. Solomon C. S. Yim This investigation deals with the chaotic rocking response and

  • Stochastic analysis of complex nonlinear system response under narrowband excitations

    Creator:
    Shih, I-Ming
    Abstract:
    Response behavior of a nonlinear structural system subject to environmental loadings is investigated in this study. The system contains a nonlinear restoring force due to large geometric displacement. The external excitation is modeled as a narrowband stochastic process possessing dynamic characteristics of typical environmental loadings. A semi-analytical method is developed...
    Resource Type:
    Dissertation
    Full Text:
    Response under Narrowb_and Excitations. Abstract approved: Solomon C. S. Yim Response behavior of a

  • Modelling, validation and simulation of multi-degree-of-freedom nonlinear stochastic barge motions

    Creator:
    Bartel, Warren A.
    Abstract:
    Recent developments in estimation of the survivability of a U.S. Navy transport barge in random seas are extended to improve accuracy. The single Degree-of-Freedom (DOF) model of a extreme roll response of a barge used in previous research is replaced by a 3-DOF roll-heave-sway model to include linear and nonlinear...
    Resource Type:
    Masters Thesis
    Full Text:
    : Solomon C. . Yim Recent developments in estimation of the survivability of a U.S. Navy transport barge

  • Deterministic and stochastic behaviors of a piecewise-linear system

    Creator:
    Mha, Ho-Seong
    Abstract:
    The (nonlinear) response behavior of a piecewise-linear system is investigated under both deterministic and stochastic excitations in this study. A semi-analytical procedure is developed to predict the system behavior by evaluating the joint probability density functions of the Fokker-Planck equations of the stochastic piecewise-linear system under random excitations via a...
    Resource Type:
    Dissertation
    Full Text:
    System. Abstract Approved: Solomon C.S. Yim The (nonlinear) response behavior of a piecewise-linear

  • Nonlinear oscillations, bifurcations and chaos in ocean mooring systems

    Creator:
    Gottlieb, Oded
    Abstract:
    Complex nonlinear and chaotic responses have been recently observed in various compliant ocean systems. These systems are characterized by a nonlinear mooring restoring force and a coupled fluid-structure interaction exciting force. A general class of ocean mooring system models is formulated by incorporating a variable mooring configuration and the exact...
    Resource Type:
    Dissertation
    Full Text:
    in Ocean Mooring Systems Abstract approved: Redacted for Privacy Solomon C.S. Yim Complex nonlinear