OPTIMIZATION OF SEGMENTED WAVE-MAKER CONTROL TO GENERATE SPATIALLY UNIFORM REGULAR WAVES IN A WAVE BASIN BY PARALLEL SIMULATED ANNEALING ALGORITHM

To ensure the accuracy of the seakeeping test of a model ship, the spatial distribution of regular wave heights generated in a wave basin should be uniform. However, the cylindrical propagation property of the waves generated by the segmented wave maker causes non-uniformity. This study aims to suppress such non- uniformity by optimizing the control amplitudes of the wave makers using "Temperature Parallel Simulated Annealing". The proposed method was numerically validated for wave generation under three different wave direction conditions in the Actual Sea Model Basin at the National Maritime Research Institute. This basin has a rounded-rectangular shape and is equipped with flap- type wave makers all around the perimeter. The proposed method demonstrates a 57% improvement in the mean absolute error of wave amplitudes at a test zone located in the basin for a wave direction of 90 degrees (generated using flaps arranged at the long side of the basin), 26% improvement for a wave direction of 120 degrees (oblique wave), and 25% improvement for a wave direction of 180 degrees (using the short side flap array) compared to wave generation by the conventional "snake motion" principle.