斜向波對多孔式港池消波牆影響之研究 (1/2)
Date Issued
2005
Date
2005
Author(s)
DOI
932611E002014
Abstract
The analysis of wave field in the harbor has
been studied by many investigations. But in all
earlier researches, the boundary condition
applied on surfaces of porous structures is the
strict slipping condition, inducing the
paradoxical inference that the wave always
permeates through the porous wall in normal
direction. By this inference, when the incoming
wave is parallel to the porous wall, the
unreasonable phenomenon that the wave
permeates through the wall completely is
inevitable.
To remedy the above paradoxical
phenomenon, a new partial-slipping boundary
condition on surfaces of the thin porous wall is
proposed in the principal investigator’s earlier
researches. Moreover, in order to apply this
boundary condition in analysis of wave field in
the harbor, an analytical solution of oblique
impact waves upon a thin porous wall with a
vertical bank behind is obtained in the present
study.
A simplified reflection coefficient and the
boundary condition usable for porous
breakwaters surrounding inside the harbor are
obtained. And the boundary element method
(BEM) is adopted to simulate the wave field
along with initial development and test.
The following step of this study is to
continuously develop the BEM model for
investigating more reasonable physical
mechanism of harbor wave fields.
Subjects
harbor wave fields
thin porous wall
partial-slipping boundary condition
Publisher
臺北市：國立臺灣大學土木工程學系暨研究所
Type
report
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