Wave Analysis by Grid Projection Method

Abstract

A new photographic technique of wave analysis is developed The deformation of grid system projected on the water surface covered by aluminum powder film is photograhed by a 35mm camera. Two-dimensional wave profiles are analysed by use of a digitizer and a micro-computer. The details of the technique is described and it is applied to various wave problems, both steady and unsteady, such as wave making of an advancing ship, unsteady 2-D wave, diffraction of regular steep waves on a blunt-ended bow, and deformation of waves above a submerged mountainous obstacle.