碩士 / 國立臺灣大學 / 土木工程學系 / 86 / Numerical modeling of nonlinear waves in
regional coastal waters
Shao-Chin Chien
Abstract
This research is to study the wave deformation under nonlinear effects,
and to develop a numerical model of nonlinear waves to describe the wave
propagation from deep seas to shallow waters. Based on the results of Wu
(1996), a two-dimensional numerical model of nonlinear waves is developed
by using finite element method. It can compute the wave field in an irregular
region with varying depths. Due to the fact of using perturbation methods,
present model provides both linear and nonlinear solutions. To extend
applicability of this model, a general sparse method to minimize the computer
storage requirement is integrated. It is found that with same
computer resource,
this model can use more meshes to calculate more precise solutions.
Comparisons of present numerical results with experimental
data are performed
( Beji & Battjes, 1994; Kittitanasuan, Goda & Shiobara, 1993 ). In weakly
nonlinear effects, this model can describe the spatial wave profile and time
series wave profile accurately. Computing the wave field around
a circular island
with paraboloid-varied depths, nonlinear motions of waves with reflection,
diffraction and refraction are studied.
| Identifer | oai:union.ndltd.org:TW/086NTU00015022 |
| Date | January 1998 |
| Creators | Chien, Shao-Chin, 簡紹欽 |
| Contributors | Tsay Ting-Kuei, 蔡丁貴, --- |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 6 |
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