Waves passing submerged porous structures with multiple regions

J. F. Lee, Y. M. Cheng

Research output: Contribution to conferencePaperpeer-review

Abstract

An analytic solution for the problem of waves propagating over a submerged porous structure, which composed of multiple regions with different materials, in front of a vertical wall is presented in this paper. In order to obtain the solution using the method of separation of variables, the problem is divided into multiple rectangular regions, which are multiple columns in horizontal and multiple layers in vertical directions. Each region contains simply homogeneous material. The solution scheme starts with solving for each column with multiple layers, and then combining all columns using matching boundary conditions. The variables in vertical direction for each layer are obtained by utilizing boundary conditions on bottom and free surface boundaries, and both kinematic and dynamic conditions on the interface between two adjacent layers. The analytic solution is then completed for the problem domain by utilizing the kinematic and dynamic conditions on the interface between two adjacent columns. The wave n umber in one column for different layers is assumed to be common, and is solved from a combined dispersion equation. To validate the present solution scheme a typical problem of waves passing a homogeneous rectangular structure is calculated. The structure is divided into arbitrary multiple regions. The comparisons with previous studies show very good agreements. To demonstrate the present analytic solution the experimental results and analytic solution using different approached by Lee (1987) are compared. The comparisons show good agreements and reasonable physical phenomena. The present analytic solution can be applied to calculate problems of waves interacting with porous structures composed of multiple regions.

Original languageEnglish
Pages631-637
Number of pages7
Publication statusPublished - 2001 Jan 1
Event11th (2001) International Offshore and Polar Engineering Conference - Stavanger, Norway
Duration: 2001 Jun 172001 Jun 22

Other

Other11th (2001) International Offshore and Polar Engineering Conference
CountryNorway
CityStavanger
Period01-06-1701-06-22

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Ocean Engineering
  • Mechanical Engineering

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