RU172647U1 - Hull of a high-speed gliding vessel of increased seaworthiness with a discrete-variable bottom wobbling - Google Patents

Abstract

The utility model relates to shipbuilding, in particular to high-speed planing vessels, and can be used in the design and construction of multi-purpose high-speed emergency rescue vessels with discretely variable pitching of the bottom, having high seaworthiness and sea-going qualities and designed to work in extreme conditions. is achieved by the fact that the hull of a high-speed planing vessel of increased seaworthiness with a discretely variable pitching of the bottom contains sides, the shape of which, like days conductive, determined by the frames, bow with stem, transom and bottom, which includes sections with a discrete variable pitching. The sections of the frames in the lower part of the body along its entire length with the transition to the stem have a rounded shape. The rounded shape of the frames in cross section has the same radius along its entire length and the ratio of the radius of curvature r to the distance "a" equal to half the width of the first bottom segment, including the cheekbone, from the diametrical plane to the point of connection with the second section of the bottom on the transom, ranges from 0.15 to 0.30. The rounded shape of the frame sections can be applied at a pitch angle of the first segment from 35 to 90 ° N All shpangoutah.Zakruglennaya cross-sectional shape of the frames of the keel and the stem will improve germination vessel on a wave that reducing nose dive, will reduce the forces destabilizing movement of the vessel with slanting course to wave. The result is a reduction in yaw on the course and a decrease in pitching. When driving with large trim angles, the rounded keel section in the stern of the vessel will operate as a hydro-ski, providing an additional lifting force, which will increase the hydrodynamic quality, reduce shock loads. The proposed utility model is aimed at increasing the directional stability of motion on waves and increasing the running, seaworthy and operational characteristics of a high-speed planing vessel with a discretely variable pitching of the bottom.

Description

The utility model relates to shipbuilding, in particular to high-speed planing vessels, and can be used to increase their seaworthiness while maintaining the planing mode, which ensures its use in the design and construction of multi-purpose high-speed emergency rescue vessels, allowing them to increase their navigation period.

Known high-speed vessels for various purposes, the main feature of which is a large deadlift of the bottom, the so-called "deep-V", which remains constant from the midship to transom (see the Handbook on small tonnage shipbuilding, publishing house "Shipbuilding", Leningrad, 1987, AM Vaganov’s book “Designing of high-speed vessels”, “Sudostroenie” publishing house, Leningrad, 1978). The magnitude of the pitching angles of the bottom on the midships ranges from 17 to 30 °, although in some cases it can reach 40 °. As a rule, such cases have longitudinal and transverse redans on the bottom. The disadvantage of such vessels is that, providing sufficient seaworthiness of the boats when driving at high speeds, these vessels require significant power supply due to the relatively low hydrodynamic quality of such contours.

Closest to the claimed technical solution is the hull of the planing vessel, containing the sides and bottom, built on the basis of the principle of discrete-variable pitching. At the same time, the bottom includes at least two sections (segments) with a discretely variable pitching, which are interconnected by an integral connection. The first segment of the bottom, which forms the keel, has a supercritical pitching angle of at least 25 ° in the aft end and a pitching angle of up to 90 ° in the fore end. The second bottom segment adjacent to the first has a pitching angle of less than 25 ° at the aft end. In addition, each subsequent bottom segment of the bottom has a lower pitch angle than the previous one. In addition, the bottom may have longitudinal redans located at the junction of sections with a discrete variable pitching. Such a design of the bottom allows to reduce the shock loads experienced by the hull of the vessel during its movement on waves, while increasing energy efficiency and improving habitability (RF patent for utility model No. 154728, IPC B63B 1/18, 2014).

However, the disadvantage of this vessel is the manifestation of increased yaw rate on the course when driving on a wave due to the pointed shape of the frames in the area of the keel. The severity of the wedge formed by the bottom part adjacent to the diametrical plane reduces the possibility of the formation of hydrodynamic forces and moments sufficient to prevent a turn when the ship leaves the set course. This leads to increased yaw rate of the vessel along the course, especially during a course on oblique passing waves, at which significant forces leading the vessel off course can arise due to deep immersion in the water of the bow tip. At the same time, a force close to the horizontal plane begins to act on the sections of the bottom near the stem and contributes to the further deviation of the vessel from course. There is a danger of the vessel tipping over during an oblique impact of the bow tip of the wave.

The proposed utility model is aimed at increasing the directional stability of motion on waves, as well as at increasing the running, seaworthy and operational characteristics of a high-speed planing vessel with a discretely variable pitching of the bottom.

The technical result is achieved by the fact that the hull of a high-speed planing vessel of increased seaworthiness with a discrete variable pitching of the bottom contains sides, the shape of which, like the bottoms, is determined by frames, the bow with stem, transom and bottom, which includes sections with a discrete variable pitching. Cross sections of the frames in the lower part of the body along its entire length with the transition to the stem have a rounded shape.

The rounded shape of the frames in the cross section has the same radius along its entire length and the ratio of the radius of the r to the distance "a" equal to half the width of the first segment of the bottom, including the cheekbone, from the diametrical plane to the point of connection with the second section of the bottom on the transom is from 0 , 15 to 0.30.

The rounded sectional shape of the frames can be applied at a pitch angle of the first segment from 35 ° to 90 ° on all frames.

The essence of the utility model is illustrated by drawings, which depict:

in FIG. 1 is a front view of the hull of a high-speed planing vessel of increased seaworthiness with a discretely variable pitching of the bottom with a rounded keel and bow.

in FIG. 2 is a side view of the hull of a high-speed planing vessel of increased seaworthiness with a discretely variable pitching of the bottom with a rounded keel and stem.

The hull of a high-speed planing vessel with increased seaworthiness with a discrete variable pitching of the bottom has a hull containing sides 1 and bottom 2. The bottom 2 includes sections with a discrete variable pitching, which are connected together by an integral connection. The first segment 3 of the bottom 2, forming the keel 4, has a supercritical pitching angle of at least 25 ° in the aft end and a pitching angle of up to 90 ° in the fore end. A hull of a high-speed vessel with a rounded shape of the frame sections in the lower part of the hull (keel 4) along its entire length with the transition of the structure rounded in the cross section corresponding to the lower part of the frames to the mast 5 is proposed. The radius of curvature r is the same in all cross sections of the structure, the central one the angle of the arc in each section is 180 °. The ratio of the radius of curvature r to the distance "a" equal to half the width of the first segment of the bottom, including the cheekbone, from the diametrical plane (DP) to the point of connection with the second section of the bottom on the transom is from 0.15 to 0.30. Rounding can be applied at a pitch angle of the first segment from 35 to 90 ° on all frames.

The rounded cross-sectional shape of the keel and stem frames will improve the vessel's germination ability by wave, which, by reducing the bow, will reduce the forces that destabilize the movement of the vessel with oblique courses towards the wave. The result is a reduction in yaw on the course and a decrease in pitching. When driving with large running angles of trim, the rounded keel section in the stern of the vessel will operate as a hydro-ski, providing the occurrence of additional lifting force, which will increase the hydrodynamic quality and reduce impact loads.

The proposed utility model of a high-speed planing vessel, in comparison with the prototype, has greater directional stability and hydrodynamic quality in waves, which, reducing the pitching and the possibility of oblique hull impacts against the wave, provides increased seaworthiness.

Claims (3)

1. The hull of a speeding planing vessel of increased seaworthiness with a discretely variable pitching of the bottom, containing sides, the shape of which, like the bottoms, is determined by the frames, bow with stem, transom and bottom, which includes sections with a discrete variable pitching, characterized in that the sections of the frames in the lower part of the body along its entire length with the transition to the stem have a rounded shape. 2. The housing according to claim 1, characterized in that the rounded shape of the frames in the cross section has the same radius along its entire length and the ratio of the radius of curvature r to the distance "a" equal to half the width of the first bottom segment, including the cheekbone, from the diametrical plane to the connection point with the second section of the bottom of the transom is from 0.15 to 0.30. 3. The housing according to claim 1, characterized in that the rounded shape of the sections of the frames can be applied at a pitch angle of the first segment from 35 to 90 ° on all frames.

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