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  schema location: http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
  title info:
    non sort: The
    title: effect of wave-current interactions on the hydrodynamic loading of large offshore structures
  name:
    name part: Watanabe, Ronald Ken
    role:
      role term: creator
  name:
    name part: Haisler, W. E.
    role:
      role term: degree committee member.
  name:
    name part: Herbich, John B.
    role:
      role term: degree supervisor.
  name:
    name part: Lou, I. K.
    role:
      role term: degree committee member.
  name:
    name part: Venezian, G.
    role:
      role term: degree committee member.
  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: 1982
    issuance: monographic
  language:
    language term: eng
  physical description:
    form: print
    extent: xvii, 143 leaves : illustrations ; 29 cm
  abstract: The influence of wave-current interactions on the fluid loading of large offshore structures has been investigated by extending the conventional diffraction theory approach to include the changes in the incident and scattered wave fields caused by the presence of a steady current. Modifications in the wave height are based upon the principle of conservation of wave action. The waves are assumed to be linear so that the effect of the current on the short-term force spectrum can be determined from the transfer function and modified Pierson-Moskowitz spectrum. A three-dimensional hybrid finite element method for computing wave forces on structures of arbitrary geometry in still water has been extended to consider the case of waves on a current. Validation of this numerical model has been performed by applying the method to a vertical circular cylinder in water of constant depth. An analytical solution for wave and current forces on a cylinder has been developed and compared with the numerical solution. In both cases, the velocity profile of the current is assumed to be uniform with depth and the flow field is uniform at infinity with a dipole at the origin. The results indicate that the dispersion relation for waves on the flow field around the structure is a function of the position coordinates, but reduces to the dispersion relation for waves on still water at the stagnation points of the flow. The maximum changes in incident wave height occur at the cylinder surface where the flow velocity is maximum. The properties of the incident wave field vary with the wave period, current velocity, current direction and position coordinates in the flow field. In the analytical solution, the coefficients of the series solution for the scattered waves become functions of the angular coordinate. For all currents, the free surface elevation at the stagnation points remains equal to its value for waves in still water. However, the total velocity potential at the stagnation points va…
  note: "Major subject: Ocean Engineering."
  note: Typescript (photocopy).
  note: Vita.
  note: Ph. D. in Philosophy Texas A & M University 1982
  note: Includes bibliographical references (leaves 113-116).
  subject:
    topic: Ocean currents
  subject:
    topic: Ocean waves
    topic: Mathematical models
  subject:
    topic: Offshore structures
    topic: Hydrodynamics
  subject:
    topic: Ocean Engineering
  identifier: http://proxy.library.tamu.edu/login
  identifier: https://hdl.handle.net/1969.1/DISSERTATIONS-369565
  identifier: http://gateway.proquest.com/openurl
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    location:
      url: http://proxy.library.tamu.edu/login
  related item:
    location:
      url: https://hdl.handle.net/1969.1/DISSERTATIONS-369565
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    location:
      url: http://gateway.proquest.com/openurl
  record info:
    record content source: TXA
    record creation date: 830922
    record change date: 20220104090219.0
    record identifier: in00000355227
    language of cataloging:
      language term: eng