本文研究主要針對波浪通過連續兩座彈性透水潛堤之問題，提出一理論解析解。求解方法為直接延伸藍、李(1999)所提出單一座彈性透水潛堤理論。求解方法上為將問題之區域劃分成七個部份，藉由交界面邊界條件的連續性，即潛堤流體交界面處之動力邊界條件壓力連續與速度連續，配合正交特性將波浪與連續彈性透水潛堤互制作用問題聯立求解，據此波浪與連續彈性透水潛堤之解析解即可求出。在模式驗證上，本文與歐等(2004)之雙列剛性不透水潛堤，丁等(2002)之雙列剛性透水潛堤之試驗結果比較，均得到合理的結果。文中探討潛堤之滲透性係數變化、尺寸變化、彈性效應變化對波場的影響。根據計算結果中指出，軟性材質潛堤結構波浪反射率會大於剛性材質潛堤結構，波浪透過率小於剛性材質潛堤結構，至於波能消散，軟性材質潛堤結構較剛性材質潛堤結構大。

In this study, the problem of waves passing two consecutive submerged poro-elastic structures is solved analytically. The solution methodology is a direct extension from Lan and Lee (1999) solving for a single submerged poro-elastic structure. Following the solution procedures, the problem domain is divided into seven regions, for which the solution forms can be presented. By using the matching boundary conditions, namely, kinematic and dynamic conditions, together with orthogonal characteristics, a set of simultaneous equations can be set up and solved consequently. The present analytic solutions are compared with Ou et al.(2004) for two consecutive impermeable rigid submerged structures, and with Ting et al.(2002) for two rigid and porous submerged structures. The comparisons are in favorably good agreements. Using the present analytic solution, effects of permeability, dimension, and elasticity of the submerged structures on wave properties are discussed. It can be concluded that for softer structures, the reflection coefficients are bigger than the rigid ones, and consequently the transmissions are smaller. And the softer structures have bigger energy damping than the rigid ones.

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