bow of a ship

Abstract

The application discloses a ship bow, which comprises a forward inclined part and a bulbous bow part; the bulbous bow part is connected to the lower part of the forward inclined part; the forward inclined part is located above the waterline, and the bulbous bow part is located below the waterline; the intersection line of the outer surface of the ship bow formed by the forward inclined part and the bulbous bow part and the ship centerline is a straight line segment and an arc line segment, the arc line segment is connected to the straight line segment, the straight line segment is located above the arc line segment, the straight line segment is distributed obliquely downward towards the stern, and the arc line segment extends towards the stern. The application solves the problem that the traditional line type cannot simultaneously consider the resistance performance under the two working conditions of ice area navigation and ice-free open water navigation, and effectively improves the comprehensive energy consumption level of the ship on the whole operation route.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a bow section of a ship. Background Technology

[0002] In recent years, with global warming, the navigation time of the Arctic shipping route has gradually increased. Since the polar routes are significantly shorter than traditional routes, the time and economic cost advantages are obvious, leading to an increase in cargo transportation demand year by year. However, the ship design of commercial polar transport vessels is not very mature at present. These vessels need to cross ice areas and navigate ice-free open water areas during the entire operation process. Most commercial ships on the market are designed for ice-free open water areas. Therefore, there is currently no ship type that can take into account both operating conditions.

[0003] Currently, there are two main types of ships on the market: one is a typical ice-navigating vessel; the other is a typical ice-free open-water vessel.

[0004] A typical ship navigating ice-covered areas has a bow profile that slopes forward near the waterline, which helps to break through the ice and reduce resistance when navigating ice-covered areas. However, the lower part of the bow does not have a typical bulbous bow feature, which is not conducive to reducing water resistance in ice-free open water conditions.

[0005] The bow profile of a typical ice-free open-water vessel has the characteristics of a traditional bow near the waterline and a bulbous bow below the waterline. Under ice-free open-water conditions, this bow exhibits excellent resistance performance. However, when navigating in ice-covered areas, the bulbous bow feature below the waterline not only lacks forward tilting characteristics but also exhibits backward tilting characteristics, which is not conducive to crushing ice layers and will significantly increase the resistance of navigation in ice-covered areas. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the above-mentioned defects in the prior art and provide a bow section for ships.

[0007] The present invention solves the above-mentioned technical problems through the following technical solution:

[0008] A bow section of a ship includes a forward-sloping section and a bulbous bow section; the bulbous bow section is connected below the forward-sloping section; the forward-sloping section is located above the waterline, and the bulbous bow section is located below the waterline; the intersection line between the outer surface of the bow section formed by the forward-sloping section and the midship longitudinal section of the ship is a straight segment and an arc segment, with the arc segment connecting to the straight segment; the straight segment is located above the arc segment; the straight segment is distributed obliquely downwards towards the stern, and the arc segment extends towards the stern; the arc segment is located aft of the straight segment.

[0009] Furthermore, the straight line segment and the arc segment are tangent.

[0010] Furthermore, the forward-leaning section is symmetrical about the centerline of the ship.

[0011] Furthermore, on the same transverse section of the ship, the width of the forward-leaning section gradually decreases from top to bottom.

[0012] Furthermore, in a cross-section on the same horizontal plane, the width of the forward-leaning portion gradually increases from front to back.

[0013] Furthermore, the bulbous bow is symmetrical about the centerline of the ship.

[0014] Furthermore, on the same transverse section of the ship, the width of the bulbous bow gradually decreases from the middle of the bulbous bow toward the top of the bulbous bow.

[0015] Furthermore, on the same transverse section of the ship, the width of the bulbous bow gradually decreases from the middle of the bulbous bow toward the bottom of the bulbous bow.

[0016] Furthermore, at the junction of the bow and the sloping section, the width of the bow and the width of the sloping section are equal.

[0017] Furthermore, the upper and lower endpoints of the straight line segment are located on the upper and lower sides of the waterline, respectively.

[0018] The beneficial effects of this invention are as follows: In this invention, the bow profile of the ship is forward-sloping near the waterline, which is beneficial for breaking through ice layers after crushing them, thereby reducing resistance when navigating in ice-covered areas. Simultaneously, the lower part of the bow below the waterline retains the typical bulbous bow characteristics, which effectively reduces water resistance in ice-free open water conditions. The bow of this invention enables the ship to maintain low icebreaking resistance when navigating in ice-covered areas while also considering its resistance performance in ice-free open water conditions. This bow design solves the problem that traditional bow designs cannot simultaneously address resistance performance in both ice-covered and ice-free open water conditions, effectively improving the overall energy consumption level of the ship throughout its operating route. Attached Figure Description

[0019] Figure 1 This is a side view of a preferred embodiment of the present invention.

[0020] Figure 2 This is a front view of a preferred embodiment of the present invention.

[0021] Figure 3 This is a perspective view of a preferred embodiment of the present invention.

[0022] Figure 4 This is a perspective view of a preferred embodiment of the present invention from another angle.

[0023] Figure 5 This is a bottom view of a preferred embodiment of the present invention. Detailed Implementation

[0024] The present invention will be described more clearly and completely below with reference to a preferred embodiment and the accompanying drawings.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a ship's bow includes a forward-sloping section 11 and a bulbous bow section 12; the bulbous bow section 12 is connected below the forward-sloping section 11. The forward-sloping section 11 is located above the waterline 10, and the bulbous bow section 12 is located below the waterline 10.

[0026] The intersection of the outer surface of the bow section of the ship, which is composed of the forward-sloping part 11 and the bulbous bow section 12, and the longitudinal section of the ship is a straight line segment 21 and an arc segment 22, with the arc segment 22 connected to the straight line segment 21; the straight line segment 21 is located above the arc segment 22.

[0027] The straight segment 21 is distributed diagonally downwards towards the stern, and the curved segment 22 extends towards the stern; the curved segment 22 is located behind the straight segment 21. The straight segment 21 and the curved segment 22 are tangent.

[0028] The upper and lower endpoints of straight line segment 21 are located on the upper and lower sides of waterline 10, respectively.

[0029] In the field of shipbuilding technology, a ship's transverse section is a vertical section along the ship's width direction, and the ship's transverse section is perpendicular to the ship's mid-longitudinal section.

[0030] The forward-leaning section 11 is symmetrical about the centerline of the ship.

[0031] On the same transverse section of the ship, the width of the forward-leaning section 11 gradually decreases from top to bottom.

[0032] On the same horizontal plane, the width of the forward-leaning portion 11 gradually increases from front to back.

[0033] The bulbous bow section 12 is symmetrical about the centerline of the ship.

[0034] On the same transverse section of the ship, the width of the bulbous bow 12 gradually decreases from the middle towards the top of the bulbous bow 12.

[0035] On the same transverse section of the ship, the width of the bulbous bow 12 gradually decreases from the middle towards the bottom of the bulbous bow 12.

[0036] At the junction of the bow and the sloping section, the width of the bow and the width of the sloping section are equal.

[0037] In this invention, the bow profile of the ship is forward-sloping near the waterline, which is beneficial for crushing and breaking through the ice layer, thereby reducing resistance when navigating in ice-covered areas. At the same time, the lower part of the bow below the waterline still retains the typical bulbous bow features. In ice-free open water conditions, this bow can effectively reduce water resistance.

[0038] The bow section of this invention enables the ship to maintain low icebreaking resistance when navigating in ice-covered areas, while also taking into account its resistance performance in ice-free open water conditions.

[0039] The bow section of this invention solves the problem that traditional hull lines cannot simultaneously address resistance performance under both ice-covered and ice-free open water navigation conditions, effectively improving the overall energy consumption level of the vessel throughout its operating route.

[0040] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A bow section of a ship, comprising a forward-sloping section and a bulbous bow section; the bulbous bow section being connected below the forward-sloping section; characterized in that, The forward-sloping section is located above the waterline, and the bulbous bow is located below the waterline. The intersection of the outer surface of the bow section (composed of the forward-sloping section and the bulbous bow) and the midship longitudinal section consists of a straight segment and an arc segment, with the arc segment connecting to the straight segment. The straight segment is located above the arc segment. The straight segment is distributed diagonally downwards towards the stern, and the arc segment extends towards the stern. The arc segment is located aft of the straight segment. The straight segment and the arc segment are tangent. The forward-sloping section is symmetrical about the centerline. On the same transverse section of the ship, the width of the forward-sloping section is... The width of the bulbous bow gradually decreases from top to bottom; on the same horizontal plane, the width of the forward-sloping section gradually increases from front to back; at the junction of the bulbous bow and the forward-sloping section, the width of the bulbous bow is equal to the width of the forward-sloping section; the upper and lower endpoints of the straight section are located on the upper and lower sides of the waterline, respectively; on the same transverse section of the ship, the width of the bulbous bow gradually decreases from the middle of the bulbous bow towards the top of the bulbous bow; on the same transverse section of the ship, the width of the bulbous bow gradually decreases from the middle of the bulbous bow towards the bottom of the bulbous bow.

2. The bow of a ship as described in claim 1, characterized in that, The bow section is symmetrical about the centerline of the ship.

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