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COMPUTER MODELING FOR WAVE OSCILLATION PROBLEMS IN HARBORS AND COASTAL REGIONS
by
Xiuying Xing
A Dissertation Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(CIVIL ENGINEERING)
May 2009
Copyright 2009 Xiuying Xing
Object Description
| Title | Computer modeling for wave oscillation problems in harbors and coastal regions |
| Author | Xing, Xiuying |
| Author email | xiuyingx@usc.edu; xingxiuying@gmail.com |
| Degree | Doctor of Philosophy |
| Document type | Dissertation |
| Degree program | Civil Engineering (Water Resources) |
| School | Viterbi School of Engineering |
| Date defended/completed | 2008-08-21 |
| Date submitted | 2009 |
| Restricted until | Unrestricted |
| Date published | 2009-05-04 |
| Advisor (committee chair) | Lee, Jiin-Jen |
| Advisor (committee member) |
Wellford, L. Carter Lee, Vincent W. Masri, Sami F. Domaradzki, Julian A. |
| Abstract | Harbors are built to provide a sheltered environment for the mooring of ships and vessels. For some wave periods the semi-enclosed harbor basin acts as a resonator to amplify the wave motions in the harbor due to the combined effects of wave diffractions, refractions and multiple reflections from the boundaries. This undesirable wave motion could induce significant ship motions, damage ships and dock facilities, and delay loading and unloading activities if the resonant wave periods are close to that of the ship mooring system. Harbor planners and engineers need to study the wave induced oscillations as new harbor layouts are contemplated.; This dissertation study presents a finite element model which could be used for predicting the response characteristics of harbors and bays of arbitrary shape and variable depth. The model incorporates the effects of wave reflection, refraction, diffraction and dissipation losses due to boundary absorption, bottom friction and energy losses due to the flow separation at the entrances. The model has been applied to three harbors (Crescent City Harbor in northern California, Pohang Harbor in Korea, and Hualien Harbor in Taiwan) and two bays (San Pedro Bay in southern California and Bay of Fundy in the east coast of Canada and US). The results from the finite element model have been shown to agree surprisingly well with the field data obtained from events such as earthquake generated tsunamis and hurricane induced wave oscillations, as well as normal day observations. The results reveal the fact that the wave oscillation condition inside a harbor or bay is determined by the local layout and bathymetry. The harbor or bay responds to the incident wave in a predictable manner irrespective to the sources of driving forces such as typhoon, tsunami, winter storms, etc. The study also explains the tremendous tide phenomena at Bay of Fundy.; Modification strategy studies for reducing the seiche problems in Pohang Harbor and Hualien Harbor have also been presented. The model is shown to be an effective engineering tool for harbor planning and design to derive ways of eliminating or altering the harbor response so that the harbor may indeed provide a sheltered environment for moored ships and vessels. |
| Keyword | wave oscillation; computer modeling; harbors and coastal regions |
| Geographic subject | harbors: Crescent City Harbor; harbors: Pohang Harbor; harbors: Hualien Harbor; bays: San Pedro Bay; bays: Bay of Fundy |
| Language | English |
| Part of collection | University of Southern California dissertations and theses |
| Publisher (of the original version) | University of Southern California |
| Place of publication (of the original version) | Los Angeles, California |
| Publisher (of the digital version) | University of Southern California. Libraries |
| Provenance | Electronically uploaded by the author |
| Type | texts |
| Legacy record ID | usctheses-m2165 |
| Contributing entity | University of Southern California |
| Rights | Xing, Xiuying |
| Repository name | Libraries, University of Southern California |
| Repository address | Los Angeles, California |
| Repository email | cisadmin@lib.usc.edu |
| Filename | etd-Xing-2834 |
| Archival file | uscthesesreloadpub_Volume44/etd-Xing-2834.pdf |
Description
| Title | Page 1 |
| Contributing entity | University of Southern California |
| Repository email | cisadmin@lib.usc.edu |
| Full text | COMPUTER MODELING FOR WAVE OSCILLATION PROBLEMS IN HARBORS AND COASTAL REGIONS by Xiuying Xing A Dissertation Presented to the FACULTY OF THE GRADUATE SCHOOL UNIVERSITY OF SOUTHERN CALIFORNIA In Partial Fulfillment of the Requirements for the Degree DOCTOR OF PHILOSOPHY (CIVIL ENGINEERING) May 2009 Copyright 2009 Xiuying Xing |
