A numerical investigation into the linear seakeeping ability of the T-craft
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2011 American Society of Naval Engineers. A computational analysis of the seakeeping of a Surface Effect Ship (SES) known as the T-Craft is presented. The model is simulated using the commercial software WAMIT, using low-order, linear potential theory. The model of the TCraft consists of catamaran hulls, rigid end skirts, and the interface between the air cushion and the water surface. Beyond the six rigid body modes of the T-Craft, additional modes are added for the motion of the interface panels. These additional modes are similar to standing wave or sloshing modes; i.e., sinusoidal modes are added until the wave motion in the cushion is modelled accurately. To verify the method used, the model is benchmarked using computational data for a small-scale barge model and experimental data for a T-Craft model. A comparison is performed for the T-Craft with and without its cushion. From the numerical model, the motions are solved in both the frequency and time domain. The results are compared to the experimental data with respect to the response amplitude operators of the rigid body modes. The addition of a cushion improves the heave and pitch response of the craft while amplifying the sway, roll, and yaw.
