A two-way ice-breaking transport ship with performance in open water

Abstract

The application discloses a bidirectional ice-breaking transport ship with open water performance, wherein the lower bow part of the bow of the ship is a small ball bow, the lower ice belt waterline is located on the upper half of the small ball bow, the outer surfaces of the upper bow part, the middle bow part and the lower bow part are streamlined, an ice discharge groove is arranged below the stern plate of the stern of the ship, the ice discharge groove is divided into two symmetrical halves by the centerline of the ship, the intersection line of the ice discharge groove and the ice-breaking stern is the stern post, the included angle between the stern post and the centerline of the ship is not greater than 30 DEG, a pod platform is arranged at the position close to the keel of the stern post, a triangular transition plate is arranged at the position close to the stern of the ship, the transition plate connects the end of the ice discharge groove and the ice-breaking stern with the stern plate, the distance between the two stern posts on the two sides of the ice discharge groove gradually increases from the stern of the ship to the keel direction, and the end of the stern post close to the transition plate is higher than the other end. The structure of the bidirectional ice-breaking transport ship has the open water performance under ballast water and the bow ice-breaking performance under the lower ice belt waterline, the bow of the ship has the ability of breaking thin ice, the stern of the ship has the ability of breaking medium heavy ice, and the bidirectional ice-breaking transport ship has important significance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of polar ship construction and design, and particularly relates to a bidirectional ice-breaking transport ship with performance in open water. BACKGROUND

[0002] The Arctic is one of the richest regions of natural resources on earth, known as a huge treasure house of natural resources on earth, including oil, natural gas, coal and iron ore resources. The proven reserves of oil, natural gas and liquefied natural gas in the Arctic Circle are as high as 90 billion barrels, 1669 trillion cubic feet and 440 billion barrels, respectively, of which oil accounts for 13% of the world's proven reserves, natural gas accounts for 30%, and liquefied natural gas accounts for 20%. Compared with the usual Panama Canal route, the trade route in the Arctic shortens the voyage by more than 6000 kilometers, greatly saving the cost of commercial transportation. Therefore, the ice-breaking transport ship has a huge market demand.

[0003] Through the investigation of the shipping statistical data of the North Sea route, it is found that the ice-breaking transport ship has 50% of the annual navigation time in the ice area and in the open water, and the ballast water line navigation accounts for a considerable proportion in the open water. For the ice-breaking transport ship with a large bulb bow, the ballast water line is located in the lower half of the bulb bow. The main purpose of the bulb bow is to reduce the wave-making resistance at the design draft (the ice area ship's upper ice water line) and improve the speed in the open water. When the ice is broken, the ice-breaking resistance at the upper ice water line is large, which leads to poor ice-breaking capacity of the bow. SUMMARY

[0004] To solve the above problems, the present application provides a bidirectional ice-breaking transport ship with performance in open water, which aims to achieve the purpose that the bow has the ability to break thin ice and the stern has the ability to break medium heavy ice. The technical scheme adopted by the present application is as follows:

[0005] A bidirectional ice-breaking transport ship with performance in open water, the bow upper part of the bow part of the ship is a straight bow, the angle between the straight bow and the horizontal plane is 90°, the bow middle part of the bow part is an inclined bow column, the angle between the inclined bow column and the horizontal plane is not greater than 60°, the bow lower part of the bow part is a small bulb bow, the lower ice water line is located in the upper half of the small bulb bow, and the outer surfaces of the bow upper part, the bow middle part and the bow lower part are streamlined.

[0006] An ice discharge groove is arranged below the stern plate of the stern part of the ship, the ice discharge groove is divided into two symmetrical halves by the centerline, the side of the ice discharge groove away from the centerline is connected with a half spoon type ice-breaking stern, the intersection line of the ice discharge groove and the ice-breaking stern is a stern column, the angle between the stern column and the centerline is not greater than 30°, a pod platform is arranged at the position close to the ship's stern of the stern column, and a triangular transition plate is arranged at the position close to the ship's stern of the stern column, the transition plate connects the end of the ice discharge groove and the ice-breaking stern with the stern plate.

[0007] The distance between the stern posts on both sides of the ice discharge groove gradually increases from the stern to the bow, and the end of the stern post close to the transition plate is higher than the other end. The intersection line formed by the intersection of the ice discharge groove and the icebreaking stern is defined as the stern line in the application. The stern line in the application forms an angle with the horizontal plane and the longitudinal plane, that is, in the three-dimensional coordinate system, the stern line forms an angle with the x-axis, y-axis and z-axis. The stern line is a line in a three-dimensional space, not a line in a two-dimensional coordinate system. The stern line in the application is different from the stern line in the prior art. The prior art only considers the direction and angle of the stern line in the two-dimensional coordinate system (that is, the stern lines on both sides of the ice discharge groove are parallel). In addition, the stern line formed by the ice discharge groove and the half spoon type icebreaking stern is not a straight line, and the whole is streamline-shaped, gradually downward from one end close to the transition plate to the other end. The application adopts this three-dimensional space stern line. Preferably, the angle formed by the stern line and the horizontal plane and the longitudinal plane is 5-10°, which can better utilize the tail shape line, change the failure mode of the flat ice from extrusion failure to bending failure, and thus reduce the icebreaking resistance.

[0008] The above-mentioned two-way icebreaking transport ship with open water performance, further, the ship is located in open water, and the ballast waterline is located in the upper half of the bulb bow.

[0009] The above-mentioned two-way icebreaking transport ship with open water performance, further, the ice belt waterline intersects with the middle part of the bow.

[0010] The above-mentioned two-way icebreaking transport ship with open water performance, further, the highest point of the upper half of the bulb bow is not less than 8m, the lowest point of the upper half of the bulb bow is not more than 5m, and the longitudinal distance between the highest point and the lowest point of the upper half of the bulb bow is 3m-4m.

[0011] The above-mentioned two-way icebreaking transport ship with open water performance, further, the maximum transverse half-width distance of the bulb bow is 1.5m.

[0012] The above-mentioned two-way icebreaking transport ship with open water performance, further, the ice belt waterline intersects with the bulb bow, forming an angle of not less than 120°.

[0013] The above-mentioned two-way icebreaking transport ship with open water performance, further, the stern posts below the stern of the ship are two, and the sponsons are also two. The centerline distance between the two sponsons along the ship length direction is not less than 1 / 2 ship width.

[0014] The above-mentioned two-way icebreaking transport ship with open water performance, further, the propeller tip clearance (the minimum distance between the propeller blade tip and the ship body) is the maximum value of one quarter of the propeller diameter and one design ice thickness.

[0015] The two-way ice-breaking transport ship with open water performance further has the transition plate forming a 45° angle with the horizontal plane.

[0016] The two-way ice-breaking transport ship with open water performance further has the ship's middle part adopting outwardly inclined sides or vertical sides.

[0017] The two-way ice-breaking transport ship structure has the advantages of open water performance under ballast waterline and bow ice-breaking performance under ice belt waterline, and has the advantages of thin ice-breaking at the bow and medium heavy ice-breaking at the stern.

[0018] The two-way ice-breaking transport ship has the advantages of open water performance under ballast waterline and bow ice-breaking performance under ice belt waterline, and has the advantages of thin ice-breaking at the bow and medium heavy ice-breaking at the stern. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of the bow structure of the present application;

[0020] Figure 2 is a schematic diagram of the stern structure of the present application;

[0021] Figure 3 is a schematic diagram of the middle structure of the present application;

[0022] Figure 4 is a schematic diagram of the small ball bow front structure of the present application;

[0023] Wherein: the bow 1 of the icebreaker, the upper part of the bow 11, the middle part of the bow 12, the lower part of the bow 13, the middle part of the icebreaker 2, the stern of the icebreaker 3, the pod platform 31, the ice discharge groove 32, the ice-breaking stern 33, the transition plate 34, the stern plate 35, the stern column 36, the ice belt waterline 41, the ballast waterline 42, the ice belt waterline 43, A-the highest point of the upper half of the small ball bow, B-the lowest point of the upper half of the small ball bow, C-the maximum half-width point of the small ball bow. DETAILED DESCRIPTION

[0024] The present application is further described in conjunction with the accompanying drawings.

[0025] A bidirectional ice-breaking transport ship with open water performance, as shown in the drawings Figure 1 The bow upper part of the ship is a straight bow, the angle between the straight bow and the horizontal plane is 90°, the bow middle part of the ship is an inclined bow column, the angle between the inclined bow column and the horizontal plane is not greater than 60°, the bow lower part of the ship is a small ball bow, the lower ice belt waterline is located on the upper half of the small ball bow, and the outer surfaces of the bow upper part, the bow middle part and the bow lower part are streamlined. The ice layer can be effectively broken, the ice-breaking requirement of the Russian Register of Shipping standard ARC4 and above can be met, the bow middle part of the ship intersects with the upper ice belt waterline, and the intersection angle between the two is 57°.

[0026] The bow lower part 13 of the ship is a small ball bow, the lower ice belt waterline is located on the upper half of the small ball bow, the ice-breaking mode is upward arching ice, the intersection angle between the two is 144°, not less than 120°, which can meet the ice-breaking requirement of the Russian Register of Shipping standard ARC4 and above, and the line type at this position is a spoon-shaped ice-breaking type line.

[0027] The ballast waterline in the open water area is located on the upper half of the small ball bow, the wave making of the ball bow and the bow wave of the main hull form a beneficial interference, so that the wave making resistance is reduced, thereby improving the speed performance of the ballast waterline 42 in the open water area, and ensuring the bow ice-breaking performance of the upper ice belt waterline.

[0028] As shown in the drawings Figure 4 The highest point A of the upper half of the small ball bow is 8.4m, and the lowest point B is 4.8m; the longitudinal distance between the highest point A and the lowest point B of the upper half of the small ball bow is 3.5m, and the maximum transverse half-width distance of the small ball bow (i.e. the horizontal distance between AC) is 1.5m.

[0029] The ship's middle part of the ice-breaking transport ship adopts an outwardly inclined side or a vertical side, as shown in FIG. 3, the inclined side scheme of the ship's middle part can be used on ship types with little difference between the structural draft and the ballast draft, or without ballast working conditions, such as polar box ships. For ice-breaking oil tankers or bulk carriers, when the ballast working condition approaches the shore, the side part above the ballast waterline is easy to collide with the shore, so the ice-breaking oil tanker or bulk carrier is still designed as a vertical side.

[0030] As shown in the drawings Figure 2As shown, an ice discharge groove is arranged below the stern transom plate of the ship, the ice discharge groove is divided into two symmetrical halves by the centerline, the side of the ice discharge groove away from the centerline is connected with the icebreaking stern, the icebreaking stern is a half-spoon type icebreaking stern, the connecting line of the ice discharge groove and the icebreaking stern is the stern post, the angle between the stern post and the horizontal line is not greater than 30°, a pod platform is arranged at the position close to the ship's waist of the stern post, a triangular transition plate is arranged at the position close to the ship stern of the stern post, and the transition plate connects the end of the ice discharge groove and the icebreaking stern with the stern transom plate. The stern transom plate is perpendicular to the stern of the icebreaking transport ship, the upper edge of the stern transom plate is connected with the upper edge of the stern post through the transition plate with an angle of 45° with the horizontal plane, and the lower edge of the stern transom plate is completely located above the ice belt reinforcement area. The setting of the transition plate with an angle of 45° can reduce the ship length and reduce the structural weight of the ship.

[0031] The intersection line of the ice discharge groove and the half-spoon type icebreaking stern is the stern post, the upper edge of the stern post is above the upper ice belt waterline, and the angle with the horizontal line is 22°, which is not greater than 30°, which can effectively break the ice layer and meet the icebreaking requirements of the Russian Register of Shipping ARC7 and above ice class. In combination with Figure 2 and Figure 3 It can be seen that the stern line in the application forms an angle with the horizontal plane and the longitudinal plane, that is, in the three-dimensional coordinate system, the stern line forms an angle with the x-axis, y-axis and z-axis, and the stern line is a line in a three-dimensional space, not a line in a two-dimensional coordinate system. Moreover, the stern line formed by the ice discharge groove and the half-spoon type icebreaking stern is not a straight line, and the whole is in a streamline shape, gradually downward from one end close to the transition plate to the other end. The three-dimensional stern line adopted in the application can better utilize the tail shape, change the failure mode of the flat ice from extrusion failure to bending failure, and thus reduce the icebreaking resistance.

[0032] The two pod platforms are arranged transversely along the ship width, and the centerline spacing of the pod platforms along the ship length direction is not less than 1 / 2 of the ship width.

[0033] The angle between the intersection line of the ice discharge groove and the half-spoon type icebreaking stern, that is, the stern post, and the longitudinal plane is 14°, which is inwardly inclined to the centerline of the ship body, which is beneficial to discharge the broken ice to the side to reduce the impact of the broken ice sliding to the bottom on the propeller and the stern fin. The propeller tip clearance of the icebreaking transport ship is one quarter of the propeller diameter or one designed ice thickness, and the larger value is taken between the two.

Claims

1. A two-way ice-breaking transport ship with open water performance, characterized in that: The bow upper part of the bow of the ship is a straight bow, the angle between the straight bow and the horizontal plane is 90°, the bow middle part of the bow of the ship is an inclined bow stem, the angle between the inclined bow stem and the horizontal plane is not more than 60°, the bow lower part of the bow of the ship is a small ball bow, the lower ice belt waterline is located on the upper half of the small ball bow, the outer surfaces of the bow upper part, the bow middle part and the bow lower part are streamlined; An ice discharge groove is arranged below the stern plate of the stern of the ship, the ice discharge groove is divided into two symmetrical halves by the centerline, the side of the ice discharge groove away from the centerline is connected with a half-spoon type icebreaking stern, the intersection line of the ice discharge groove and the icebreaking stern is a stern stem, the angle between the stern stem and the centerline is not more than 30°, a pod platform is arranged at the stern stem close to the ship's stern, and a triangular transition plate is arranged at the stern stem close to the ship's stern, the transition plate connects the end of the ice discharge groove and the icebreaking stern with the stern plate; The distance between the two stern stems on the two sides of the ice discharge groove gradually increases from the ship's stern to the ship's center, and the end of the stern stem close to the transition plate is higher than the other end; The intersection angle between the lower ice belt waterline and the small ball bow is 144°, and the line type at this position is a spoon type icebreaking line.

2. A dual-purpose ice-class transport ship according to claim 1, characterized in that: The ship is located in an open water area, and the ballast waterline is located on the upper half of the small ball bow.

3. A dual-purpose ice-class transport ship according to claim 1, characterized in that: The upper ice belt waterline intersects with the bow middle part.

4. A dual-purpose ice-class transport ship according to claim 1, characterized in that: The highest point of the upper half of the small ball bow is not less than 8m, the lowest point of the upper half of the small ball bow is not more than 5m, and the longitudinal distance between the highest point and the lowest point of the upper half of the small ball bow is 3m-4m.

5. A dual-purpose ice-class transport ship according to claim 1, characterized in that: The maximum transverse half-width distance of the small ball bow is 1.5m.

6. A dual-purpose ice-class transport ship according to claim 1, characterized in that: The lower ice belt waterline intersects with the small ball bow, forming an angle of not less than 120°.

7. A dual-purpose ice-class transport ship according to claim 1, characterized in that: The stern stems below the stern of the ship are two, and the pod platforms are also two, and the centerline distance between the two pod platforms along the ship length direction is not less than 1 / 2 ship width.

8. A dual-purpose ice-class transport ship according to claim 1, characterized in that: The propeller tip clearance of the ship is the maximum value in the one fourth propeller diameter and one design ice thickness.

9. A dual-purpose ice-class transport ship with performance in open water according to claim 1, characterized in that: The transition plate forms an angle of 45° with the horizontal plane.

10. A dual-purpose ice-class transport ship according to claim 1, characterized in that: The ship's center part adopts outward bulwark or vertical bulwark.

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