COMPLIANT WATER WAVE ABSORBERS.
Abstract
This report comprises a detailed theoretical and experimental study of the problem of absorbing plane water waves by means of a moving boundary at one end of a channel. The non-linear problem is formulated as a sequence of linear problems by means of perturbation techniques. This formulation is carried out first for a general moving boundary and then for the specific case where the boundary is a hinged paddle above a solid wall. In order to avoid the parameter of the channel length in the theoretical work, this work is carried out for a semiinfinite tank. Solutions for the necessary wave absorber characteristics are determined by the first order (linear) theory. Second order solutions are determined when the incident wave is a plane, periodic, progressive wave. The theoretical developments are done with the neglect of surface tension, but these effects are considered in a separate chapter and they are accounted for in the computer programs used for the design of a wave absorbing system. The problem of synthesizing a wave absorbing system whose characteristics closely approximate an ideal absorber and which can be constructed readily is solved. The solution of this problem requires a computeraided design procedure for electric filters which may be of general interest for its own sake, apart from the remainder of this work.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1965
- Accession Number
- AD0624508
Entities
People
- Jerome H. Milgram
Organizations
- Massachusetts Institute of Technology