RU2043941C1 - High-speed multi-hulled vessel - Google Patents

Abstract

FIELD: shipbuilding. SUBSTANCE: shape of multi-hulled high-speed vessel is of M-form; ship has outer hulls and center hull whose keel line is located in ship's CL at height equal to 4 to 6 percent of ship's length between perpendiculars. Vertical clearance between BL and point of conjugation of outer and center hulls is equal to 8 to 12 percent of ship's length between perpendiculars; distance between outer hulls over keel lines is equal to 15 to 25 percent of ship's length between perpendiculars; center hull has at least one planing step. EFFECT: enhanced reliability. 2 cl, 2 dwg

Description

 The invention relates to shipbuilding, in particular to the field of hydrodynamics and seaworthiness of multihull high-speed vessels.

 A multi-hull vessel is known comprising wing profiles installed between the outer hulls in the area of the keel line and the middle hull formed between the outer hulls of the M-shaped contours, the keel line of which is located in the ship’s diametrical plane.

 The disadvantages of this multihull vessel are large shock overloads when waves from shock waves in the middle hull due to the small pitching angles and, as a consequence, a decrease in speed on waves and a decrease in the efficiency of the vessel's operational characteristics.

 The purpose of the invention is to increase operational efficiency and improve seaworthiness and driving performance.

 For this, in a multihull high-speed vessel, the keel line of the middle hull is located at an altitude of 4-6% of the length of the vessel between the perpendiculars, the vertical clearance between the main plane and the interface between the middle and the outer hull is 8-12% of the length of the vessel between the perpendiculars hulls along keel lines is 15-25% of the length of the vessel between perpendiculars.

 In addition, the middle body has at least one longitudinal redan.

 In FIG. 1 shows a longitudinal section of the vessel along the interface plane of the right outer hull with the middle hull; in FIG. 2 the same, front view and rear view.

 The vessel consists of two displacement outer hulls 1, interconnected by a middle hull 2, having an M-shape.

The inner sides 3 of the outer buildings 1 are made with an inclination of up to 20 ^about from the vertical. At the junction of the inner side 3 of the outer casing 1 and the middle 2, a smooth transition is made. Thus, the entire inner contour between the outer casings is M-shaped. To create additional lifting force between the outer casings, several profiles are installed 4. The middle housing 2 may have longitudinal redans 5 to reduce its washing.

The peculiarity of the contours is that the vertical clearance in the diametrical plane (DP) from the main plane (OP) to the keel of the middle body will be 4-6% of the body length between perpendiculars (L ₁₁ ), and the vertical clearance in the interface plane of the middle and outer bodies will be 9-11% L ₁₁ .

It is advisable to use the proposed contours with a width between the outer casings of 15-25% L ₁₁ .

The volume of the outer hulls is selected from the conditions for ensuring the propulsion and landing of the vessel so that with a full displacement the draft of the vessel afloat will be 6-8% L ₁₁ . Thus, the middle body will be half immersed in water, which will allow for additional lifting force from the displacement.

1,5 1-5, где V скорость судна, м/с;
Δ объемное водоизмещение, м³;
g 9,81 м/с² ускорение свободного падения, узкие длинные корпуса будут иметь сопротивление ниже чем однокорпусные глиссирующие суда, что обеспечит им отсутствие горба сопротивления и устойчивое движение на всех скоростях вплоть до максимальных.When the vessel is moving at low speeds, with Froude numbers for displacement
F _rΔ

1.5 1-5, where V is the speed of the vessel, m / s;
Δ volumetric displacement, m ³ ;
g 9.81 m / s ² acceleration of gravity, narrow long hulls will have lower resistance than single hull planing vessels, which will provide them with no hump of resistance and stable movement at all speeds up to maximum speeds.

At speeds F _rΔ greater than 1.5, lifting force begins to act on profiles 4, and at F _rΔ 3-3.5 it will amount to 80-95% of the mass of the vessel. In this case, the middle body 2 will completely come out of the water and will not create additional resistance.

 When the sea is rough, the V-shaped contours of the middle body 2 will provide a smooth entrance to the crest of the wave and the ascent of the body above the wave. To reduce the "dip" of the hull into the wave allows longitudinal edany 5, which will dampen the vertical roll and reduce the washing of the middle hull 2, which will improve the driving performance of the vessel.

 Thus, the proposed design will allow you to have high speeds on the waves and will ensure the effective operation of profiles 4 to moderate pitching.

 The proposed form of the hull will provide less draft afloat compared to the prototype, as well as greater speed on waves, which will increase the economic efficiency of using the vessel.

Claims (2)

 1. MULTI-HOUSING FAST-BOAT SHIP, comprising wing profiles installed between the outer hulls in the area of the keel line and the middle hull formed between the outer hulls of the M-shaped contours, the keel line of which is located in the diametrical plane of the vessel, characterized in that the keel line of the middle hull is located at a height 4 6% of the length of the vessel between perpendiculars, the vertical clearance between the main plane and the interface between the middle and outer hulls is 8 -12% of the length of the vessel between perpendiculars ramie, and the distance between the outer enclosures of keel lines is 15 to 25% of the ship's length between perpendiculars.  2. The vessel according to claim 1, characterized in that the middle hull is equipped with at least one redan.

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