| 摘要 |
A high-speed marine vessel, the weight of which is supported by specified combinations of hull elements, i.e. planing surfaces, displacing volumes, air cushions and, at high-speed, also surfaces that are affected by aerostatic and aerodynamic pressure. The size and arrangement of the hull elements are designed to achieve as large an effect as possible for their respective lifting and motion damping properties, in order to give the vessel the intended advantageous characteristics in terms of speed, resistance and behaviour in waves. By having a degree of freedom to position the centre of the upward forces in relation to the centre of gravity, the natural frequency of the vessel when moving in a vertical plane can be influenced. All of the hull arrangements are intended to use water jet propulsion, which in no way prevents the choice of other propulsion systems. All known systems for active motion control can also be fitted. All of the hull designs can be arranged such that aerodynamic lift on the superstructure of the vessel and-in multihull applications-aerostatic lift in the hull tunnel (tunnels) can be used to reduce the total resistance of the vessel, the effect increasing as the speed increases. The fact that the design has hull tunnels, and thus utilises aerostatic lift, distinguishes the invention favourably from other types of air cushion vessels. In its original design, the proposed vessel provides a simple construction, freedom in the choice of propulsion device, simple motion control in waves and low "hump" resistance compared with other, similar air cushion vessels.
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