| Summary: | 碩士 === 國立海洋大學 === 河海工程學系 === 85 === Based on linear wave theory,
the reflection of incident wave on surface-piercing obstacles
are studied with constant depth. By calculating the reflection
and transmission coefficients, the wave blocking effect can be
discussed. In the constant water depth with a circular body,
based on the Composite Boundary Element Method(CBEM), the
changes in wave height for the circular body were calculated
with different wave incident angles.As shown in the numerical
results, for all the ocean structure, the wave blocking effect
would increase as the d/h increases. This shows that the wave
blocking effect is effective for deep water wave(or short crest
wave). In the vertical plates, for static water level exists in
between plates and similar to the d/h, the exist a Zero
Reflection and Complete Transmission phenomena. Comparing the
rectangular blocks with vertical plates, in deep water wave
area, single vertical plate would provide effective wave
blocking effect. As for shallow water, eight vertical plates
would provide the most effective wave blocking effect.
Calculation results for different plates show that, for plates
with singularity relations would similar wave blocking effect.
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