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mods:
  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    title: Nonlinear response of an articulated offshore loading platform
  name:
    name part: Choi, Han Suk
    name part: 1952-
    role:
      role term: creator
  name:
    name part: Alexander, Richard M.
    role:
      role term: degree committee member.
  name:
    name part: Herbich, John B.
    role:
      role term: degree committee member.
  name:
    name part: Kim, Cheung H.
    role:
      role term: degree committee member.
  name:
    name part: Lou, Jack Y. K.
    role:
      role term: degree supervisor.
  name:
    name part: Texas A & M University
    role:
      role term: degree granting institution.
  type of resource: text
  genre: bibliography
  genre: Academic theses.
  origin info:
    place:
      place term: xx
    date issued: 1989
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xv, 128 leaves : illustrations ; 29 cm
  abstract: Analytical models were developed for the dynamic analysis of an articulated loading platform (ALP) and a moored tanker system under regular wave excitations. Three different mathematical models were developed: two single-degree-of-freedom (SDOF) systems, one with a continuous and the other with a piecewise-nonlinear restoring function, and a two-degree-of-freedom (2-DOF) system with a piecewise-nonlinear restoring function. The dynamic response and stability of the SDOF systems were investigated by using the harmonic valance method and direct numerical integrations. A simple and efficient algorithm was developed to analyze the piecewise-nonlinear system by the harmonic balance method and fast Fourier transformation technique. The highly nonlinear characteristics, including subharmonics, instabilities, period-doubling bifurcations, Lyapunov exponents, and domains of attraction were examined. Possible occurrence of chaotic motion was investigated by means of direct numerical integration and the application of the classical stability theory with the aid of Hill's type equation. It was discovered that chaotic motion developed either through period-doubling bifurcations or occurred suddenly at extremely high excitations in an unsymmetric system with continuous restoring function. Such motions will only take place under the action of a train of extremely large waves. However, the behavior of a nonlinear system is very sensitive to any changes in system parameters. The threshold of onset of chaos will change as the system parameter varies. Chaotic motions in a piecewise-nonlinear system are more likely to occur in a less severe ocean environment as compared to the continuous system. Time domain numerical simulations were used to study the 2-DOF system. Only low order subharmonic motions were observed to co-exist with harmonic motions. Due to the nonlinearities involved in the system, subharmonic oscillations with slowly varying amplitudes have occurred at certain range of …
  note: "Major subject: Ocean Engineering."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. Texas A & M University 1989
  note: Includes bibliographical references.
  subject:
    topic: Nonlinear theories
  subject:
    topic: Offshore structures
    topic: Hydrodynamics
  subject:
    topic: Petroleum shipping terminals
  subject:
    topic: Tankers
    topic: Hydrodynamics
  subject:
    topic: Major ocean engineering
  identifier: http://gateway.proquest.com/openurl
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-1015079
  identifier: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: http://gateway.proquest.com/openurl
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-1015079
  related item:
    location:
      url: http://proxy.library.tamu.edu/login
  record info:
    record content source: TXA
    record creation date: 900601
    record change date: 20220103134815.0
    record identifier: in00000902748
    language of cataloging:
      language term: eng