Straight wall constant humidity long slide type round bilge speedboat type

A wet long slide type and round bilge technology, which is applied to ships, hydrodynamic characteristics/hydrostatic characteristics, hulls, etc., can solve the limitation of the range of use conditions of traditional double-hull round bilge speedboats, and the reduction in the stability of the speedboat's longitudinal motion , Wetting length reduction and other issues, to achieve the effect of expanding the range of service conditions, good longitudinal motion stability, and increasing speed

CN103612707BInactive Publication Date: 2016-01-06JIANGSU UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2016-01-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a straight wall constant wetted length slideway type round bilge speed boat shape which is characterized in that a boat body comprises two straight wall constant wetted length round bilge lateral bodies in left-right symmetry, slideway tops and slideways, the straight wall constant wetted length round bilge lateral bodies are formed by straight wall contour lines, slideway contour lines, stern cross section lines, stern bottom oblique ascensions, midship cross section lines and midship bottom oblique ascensions. The straight wall constant wetted length slideway type round bilge speed boat shape has the advantages that the wetted length is constant, during sailing, waves and flying foams on the outer side of the boat body are reduced greatly, the waves, flying foams and air flows on the inner side of the boat body flow through the slideways and flow out towards the rear of the boat at high speed, parts of the energy of the waves and flying foams on the inner side of the boat body are recycled by the slideways (equals to wave and foam elimination) and converted into the dynamic lifting force of the boat body along with the air flows, the operability, navigability and seakeeping performance of the boat shape are increased greatly, and the boat shape is applicable to sea conditions 1-2 levels higher than those which traditional speed boats are applicable to. In addition, due to the fact that the wetted length of the boat shape is constant, the performance of the boat shape can be favorably and theoretically analyzed and researched by using length Froude number.
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Description

technical field

[0001] The invention relates to a speedboat type, in particular to a military and civilian double-hull speedboat suitable for a Froude number greater than 0.5 to 1.3 in length and capable of normal navigation under relatively high sea conditions, and belongs to the technical field of ship type. Background technique

[0002] The round bilge speedboat has greater wave-making resistance and smaller droplet resistance when navigating in the transition state, and the sum of these two resistances accounts for more than 50% of the total resistance. The proportion of foam resistance increases, and the proportion of the sum of these two resistances to the total resistance continues to increase, even exceeding 70% of the total resistance. Waves and droplets are inherent physical phenomena when speedboats sail, and they are unavoidable. The current catamaran speedboat hardly improves the resistance, but only keeps the hull in a relatively stable sailing state supported ...

Examples

Embodiment Construction

[0021] The present invention and design method will be further described below in conjunction with accompanying drawings and specific embodiments.

[0022] figure 1 Among them, taking point o as the origin, draw a horizontal line segment ox whose length is equal to the design waterline length L of the hull toward the bow direction, and the line segment ox is the design waterline 12 of the hull.

[0023] figure 1 Among them, taking point o as the center of the circle, the length L of the design waterline 12 of the hull is the radius R, and an arc K10K11 is drawn to obtain the bow column line 131, the lower end point of the arc K10 is below the design waterline 12 of the hull, and the distance from the hull The distance a=L / (9~11) from the design waterline 12, the upper end point K11 of the arc is above the design waterline 12 of the hull, and the distance b=(0.2~0.5)a from the design waterline of the hull; K10 draws a horizontal straight line towards the stern of the boat, an...