Abstract
Scuba diving is becoming popular as a leisure activity. Although manufacturers make various types of diving fin, these developments are based on qualitative methods because of the difficulty in estimating the fin effeciency quantitatively. In this research, a simulation model to assess the performance of diving fin was constructed by extending the swimming human simulation model SWUM. In this model, the fin was modeled as a series of five rigid plates. These plates were connected by virtual springs and dampers, and fin's elasticity was represented by springs. The swimming motion with fins was obtained by motion capture experiment, and the fin parameters such as the shape, the rigidity, and the hydrodynamic coefficent, were determined by comparing the deformation and the drag measurement with the result of simulation. Finally, the diving swimming was simulated, and the swimming speed was found to be about 0.85 m/s. The speed was 10% higher compared with the actual diver's speed.
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