초록 ▼

A ship having main hull 2 and at least one side hull provided to correspond to the inequality [Figure] in which n is the number of hulls, Si the surface area of the cross section of the side hull at the floatation, di the side distance between the longitudinal axis of the hull No. i and the longitud

A ship having main hull 2 and at least one side hull provided to correspond to the inequality [Figure] in which n is the number of hulls, Si the surface area of the cross section of the side hull at the floatation, di the side distance between the longitudinal axis of the hull No. i and the longitudinal axis of the main hull 2, D4 the module of stability and BG the distance between the center of the displacement B and center of gravity G of the ship.

대표청구항 ▼

In a displacement and multi-hull ship having a navigation water line (F), comprising a central float having a longitudinal axis (X) connected to at least two side floats, each side float having a longitudinal axis (x), the improvement wherein: said central float has a large length/width ratio and a

In a displacement and multi-hull ship having a navigation water line (F), comprising a central float having a longitudinal axis (X) connected to at least two side floats, each side float having a longitudinal axis (x), the improvement wherein: said central float has a large length/width ratio and a low roll stability, and said side floats have a horizontal section substantially constant over a major portion of their height; and wherein for any horizontal section in the area extending over a height of at least 6% of the distance from the axes (x) of the floats to the axis (X) of the ship above and below any navigation water line (F) of the ship, the shapes of the horizontal sections of the side floats are such that the sum, for all of the side floats, of the products, for each float, of the surface expressed in square meters of its horizontal cross section, multiplied by the square of the distance expressed in meters, from its axis (x) to the axis (X) of the ship, does not exceed the product of 80% of the ship weight expressed in metric tons by the sum of the number 4 and of the distance expressed in meters between the center of displacement (B) and the center of gravity (G) of the ship; wherein at least one side float on each side of the central float is partially immersed at zero speed; and wherein the central float has, for any navigation water line, a width/draught ratio of at least equal to 1 and a length/width ratio at least equal to 8.