A method of building a large windscreen section for a ship

Abstract

The application discloses a kind of ship large wind shield sectioned construction method, the method is by first dividing wind shield into multiple wind shield sections, and is respectively built on computer jig, and is carried out on total assembly platform Total assembly, and the total section of wind shield after closing is carried out finite element modeling and lifting deformation calculation, then the lifting of wind shield total section is carried out.The method of the application reduces the workload of wind shield section loading, closing and welding and ship erection by segmenting the total section of wind shield, while avoiding the risk of high-altitude work, improving the integrity of the wind shield structure, reducing the wind shield lifting deformation, and improving the installation accuracy.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of shipbuilding, and particularly relates to a ship large wind shield section construction method. BACKGROUND

[0002] As a new type of steel structure section of a ship, the large wind shield is generally applied to large container ships and mainly used to reduce the wind resistance of the ship body when the ship is running and reduce fuel consumption. The large wind shield section mainly includes an outer shell plate, a top plate, an eave plate and a rib member and other steel structures, and has a whole double-curved surface shape. The large wind shield section is arranged in the bow deck area of the ship, extends from the bow end to the No. 1 cargo compartment area, and is in line with the deck plate line. The single side length of the large wind shield section is about 15 meters, the highest part is more than 20 meters, the overall weight is more than 300 tons, and the large wind shield section is welded to the panel of the bulwark section. Therefore, the whole construction cannot be carried out in the section stage, and the large wind shield section needs to be divided into several small sections and then constructed by combining the small sections. SUMMARY

[0003] The present application aims to overcome the deficiencies in the prior art and provide a ship large wind shield section construction method. The method of the present application reduces the workload of the wind shield section loading and combining and welding and the workload of the ship on the footwork by dividing the wind shield section into several sections, avoids the risk of high-altitude work, improves the integrity of the wind shield structure, reduces the deformation of the wind shield during hoisting, and improves the installation accuracy.

[0004] In order to achieve the above-mentioned application purpose, the technical scheme provided by the present application patent is as follows:

[0005] A ship large wind shield section construction method, which specifically includes the following steps:

[0006] Firstly, the wind shield section is divided into a middle section, a left side bow section, a right side bow section, a left side stern section and a right side stern section.

[0007] Secondly, after the section division, each section is constructed on the electric tire frame.

[0008] Thirdly, after the construction of each wind shield section is completed, each wind shield section is transported to the total assembly platform and combined into a wind shield section.

[0009] Fourthly, after the wind shield section is combined, the welds of the wind shield section are repaired, polished and painted, and the wind shield section construction is completed.

[0010] Fifthly, after the wind shield section construction is completed, finite element modeling and hoisting deformation calculation are performed on the wind shield section, and according to the modeling and calculation results, reinforcing members and hoisting rings are installed on the wind shield section.

[0011] In the sixth step, after the installation of the reinforcing members and the lifting rings of the wind shield section, the wind shield section is hoisted onto the ship and welded to the bow deck to be fixed; and the hoisting of the wind shield section is completed.

[0012] The distribution of the wind shield sections in the first step is as follows: the wind shield section is divided into a middle section, a left side bow section, a right side bow section, a left side stern section and a right side stern section from the bow to the stern of the ship.

[0013] The wind shield section is divided according to the weight and the longitudinal unfolding size of the wind shield section, and the weight of each wind shield section is not more than 100 tons, and the longitudinal unfolding size of each wind shield section is not more than 18 meters. The middle section spans the left side and the right side of the ship, and the length of the middle section is not more than 8 meters.

[0014] In the second step, each wind shield section is built on an electric calculation jig, and the building method of each wind shield section is the same. The specific steps of building the wind shield section on the electric calculation jig are as follows: first, the outer plate of the wind shield section is laid on the electric calculation jig and a marking operation is performed; then, the outer plate ribs are pre-assembled on the outer plate according to the marking position; then, the horizontal longitudinal girders on the outer plate are positioned and installed on the outer plate; then, the pre-assembled ribs and rib plates on the outer plate are installed and fixed in turn; then, the small structural parts such as the knee plates on the outer plate are installed on the outer plate; finally, the top plate and the eave plate are installed on the outer plate, and the building of the wind shield section is completed.

[0015] The specific steps of the total section closing of the wind shield section on the total assembly platform are as follows: the wind shield section further includes a bulwark section, the built bulwark section is placed on the total assembly platform with the face plate facing upwards, the middle section is hoisted on the middle part of the bulwark section and positioned horizontally and centrally, the middle section is welded to the face plate of the bulwark section, the left side bow section and the right side bow section are hoisted on both sides of the middle section, the lower parts of the left side bow section and the right side bow section are connected to the bulwark section, and finally, the left side stern section and the right side stern section are hoisted onto the bulwark section, the bulwark section is at the bottom of the wind shield, and the bulwark section is welded to the bottom of the middle section, the left side bow section, the right side bow section, the left side stern section and the right side stern section, and the total section closing of the wind shield section is completed.

[0016] When the left side by the bow segment and the right side by the bow segment are hoisted and closed, the vertical welds between the left side by the bow segment and the right side by the bow segment and the middle segment are welded and fixed first, and then the left side by the bow segment and the right side by the bow segment and the bulwark segment are welded and fixed; after the vertical welds between the left side by the stern segment and the left side by the bow segment are welded and fixed, the left side by the stern segment and the bulwark segment are welded and fixed, after the vertical welds between the right side by the stern segment and the right side by the bow segment are welded and fixed, the right side by the stern segment and the bulwark segment are welded and fixed, and the welding and fixing of the total assembly of all the windbreak cover segments are completed.

[0017] The specific steps of the finite element modeling and hoisting deformation calculation of the windbreak cover total segment in the fifth step are as follows: a three-dimensional finite element structure model of the windbreak cover and the bulwark segment is established by using finite element software, boundary constraint conditions of the hoisting point position are set on the established three-dimensional finite element structure model according to the overall structure hoisting scheme of the windbreak cover total segment, the hoisting deformation amount of the windbreak cover total segment is obtained by analyzing and calculating through the finite element software, and the structure at the deformed position is locally reinforced by a reinforcing member according to the deformation size and position of the windbreak cover total segment.

[0018] The reinforcing member of the windbreak cover total segment in the fifth step is a 20# channel steel and a 22a type I-beam, the reinforcing member is installed on the bulwark segment, and the vertical distance between the reinforcing member and the bottom of the outer plate of the lower opening windbreak cover total segment is 300mm.

[0019] Based on the above technical solution, the ship large-scale windbreak cover segment construction method has the following technical advantages after practical application:

[0020] 1. The ship large-scale windbreak cover segment construction method reduces the workload of windbreak cover segment assembly and closure welding and ship footwork erection by segmenting the windbreak cover total segment, avoids the risk of high-altitude operation, improves the integrity of the windbreak cover structure, reduces the hoisting deformation amount of the windbreak cover, and improves the installation precision.

[0021] 2. The ship large-scale windbreak cover segment construction method uses the normal resting installation and closure method for the windbreak cover segment and the bulwark segment, which not only facilitates horizontal positioning by using the panel components of the bulwark segment, but also can be butt jointed according to the outer plate line type of the bulwark segment, improves the overall construction precision of the large-scale windbreak cover, and simultaneously performs total assembly and closure in the normal state, so that the windbreak cover segment does not need to be turned over for operation, and the hoisting and turning deformation is reduced.

[0022] 3. The ship large-scale windbreak cover segment construction method avoids direct hoisting deformation of the windbreak cover segment by first closing and installing the windbreak cover segment and the bulwark segment and then hoisting, thereby improving the overall installation precision. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a wind cover section division structure diagram in a ship large wind cover section construction method of the present application.

[0024] Figure 2 is a wind cover section construction diagram in a ship large wind cover section construction method of the present application.

[0025] Figure 3 is a wind cover section construction diagram in a ship large wind cover section construction method of the present application. DETAILED DESCRIPTION

[0026] In order to make the objects, technical solutions and advantages of the present application clearer and more comprehensible, the present application will be described below through specific examples shown in the drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0027] As Figure 1 -mentioned, the present application belongs to a ship large wind cover section construction method, which specifically comprises the following steps:

[0028] Firstly, wind cover section division, the wind cover section 1 is divided into the middle section 2, the left side near bow section 3, the right side near bow section 4, the left side near stern section 5, the right side near stern section 6;

[0029] Secondly, after the section division, each section is constructed on the computer jig;

[0030] Thirdly, after the construction of each wind cover section is completed, each wind cover section is transported to the general assembly platform and is assembled into the wind cover section 1;

[0031] Fourthly, after the assembly of the wind cover section 1 is completed, the welds of the wind cover section 1 are repaired, polished and painted; the construction of the wind cover section 1 is completed;

[0032] Fifthly, after the construction of the wind cover section 1 is completed, the finite element modeling and the lifting deformation calculation of the wind cover section 1 are carried out, and the reinforcement and the lifting ring of the wind cover section 1 are installed according to the modeling and calculation results;

[0033] Sixthly, after the reinforcement and the lifting ring of the wind cover section 1 are installed, the wind cover section 1 is hoisted onto the ship and is welded and fixed with the bow deck; the hoisting of the wind cover section 1 is completed.

[0034] The distribution of the wind shield segments in the first step is: from the bow to the stern, the wind shield segments are divided into the middle segment 2, the left side near the bow segment 3, the right side near the bow segment 4, the left side near the stern segment 5 and the right side near the stern segment 6 in sequence; the segmental construction of the wind shield total segment reduces the workload of the wind shield segment loading, folding and welding and the workload of the ship's footwork erection, avoids the risk of high-altitude operation, improves the integrity of the wind shield structure, reduces the deformation of the wind shield hoisting, and improves the installation precision.

[0035] The distribution of the wind shield segments is: the wind shield total segment 1 is divided into wind shield segments according to the weight and the longitudinal development size of the outer plate of the wind shield segments, the weight of each wind shield segment is not more than 100 tons, the longitudinal development size of each wind shield segment is not more than 18 meters, the middle segment 2 spans the left side and the right side of the ship, and the length of the middle segment 2 is not more than 8 meters.

[0036] In the second step, each wind shield segment is constructed on an electric calculation jig, and the construction method of each wind shield segment is the same. The specific steps of the construction of the wind shield segment on the electric calculation jig are: first, the outer plate of the wind shield segment is laid on the electric calculation jig and the marking operation is performed, then the outer plate rib 86 is pre-assembled on the outer plate according to the marking position, then the horizontal longitudinal girder 82 on the outer plate is positioned and installed on the outer plate, and then the pre-assembled rib 86 and the rib plate 83 on the outer plate are installed and fixed in sequence, after the rib 86 and the rib plate 83 are installed in sequence, the elbow plate 81 and other small parts on the outer plate are installed on the outer plate, and finally the top plate 85 and the eave plate 84 are installed on the outer plate, and the construction of the wind shield segment is completed.

[0037] The specific steps of the total segment folding of the wind shield segment on the total assembly platform are: placing the completed bulwark segment 7 on the total assembly platform, arranging the panel of the bulwark segment 7 upwards, hoisting the middle segment 2 in the middle of the bulwark segment 7 and positioning horizontally and centrally, welding and fixing the middle segment 2 and the panel of the bulwark segment 7, hoisting the left side near the bow segment 3 and the right side near the bow segment 4 on both sides of the middle segment 2 respectively, connecting the lower parts of the left side near the bow segment 3 and the right side near the bow segment 4 with the bulwark segment 7, and finally hoisting the left side near the stern segment 5 and the right side near the stern segment 6 to the bulwark segment 7, the bulwark segment is at the bottom of the wind shield, and the bulwark segment is welded and fixed with the bottom of the middle segment, the left side near the bow segment, the right side near the bow segment, the left side near the stern segment and the right side near the stern segment, and the total segment folding of the wind shield segment is completed; the normal resting installation folding method of the wind shield segment and the bulwark segment not only facilitates horizontal positioning by using the panel components of the bulwark segment, but also facilitates abutting and connecting according to the outer plate line type of the bulwark segment, improves the overall construction precision of the large wind shield, and simultaneously performs normal total assembly folding, so that the wind shield segment does not need to be turned over again, reducing the hoisting and turning deformation.

[0038] When the left side by the bow section 3 and the right side by the bow section 4 are hoisted and closed, the vertical welds between the left side by the bow section 3 and the right side by the bow section 4 and the middle section 2 are welded and fixed first, and then the left side by the bow section 3 and the right side by the bow section 4 and the bulwark section 7 are welded and fixed; the vertical welds between the left side by the stern section 5 and the left side by the bow section 3 are welded and fixed first, and then the left side by the stern section 5 and the bulwark section 7 are welded and fixed; the vertical welds between the right side by the stern section 6 and the right side by the bow section 4 are welded and fixed first, and then the right side by the stern section 6 and the bulwark section 7 are welded and fixed, thereby completing the welding and fixing of the total assembly of all the wind shield sections.

[0039] The specific steps of the finite element modeling and hoisting deformation calculation of the wind shield total section in the fifth step are as follows: the wind shield and the bulwark section are used to establish a three-dimensional finite element structure model by using finite element software, and the boundary constraint conditions of the hoisting point positions are set on the established three-dimensional finite element structure model according to the overall structure hoisting scheme of the wind shield total section; the hoisting deformation amount of the wind shield total section is obtained by analyzing and calculating through the finite element software; and the structure at the deformed position is locally reinforced by the reinforcing member according to the deformation size and position of the wind shield total section.

[0040] The reinforcing member of the wind shield total section 1 in the fifth step is a 20# channel steel and a 22a type I-beam, which is installed on the bulwark section 7, and the vertical distance between the reinforcing member and the bottom of the outer plate of the lower opening wind shield total section is 300 mm.

[0041] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application and not to limit them; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that; the specific embodiments of the application can be modified or some technical features can be replaced by equivalent ones; without departing from the spirit of the technical solutions of the present application, which should be covered in the technical solution range of the present application.

Claims

1. A method of building a ship's large wind deflector section, characterized in that, The method specifically comprises the following steps: The first step is to divide the wind shield into segments, which are divided into a middle segment, a left side bow segment, a right side bow segment, a left side stern segment and a right side stern segment; The distribution of the wind shield segments in the first step is that the wind shield is divided into the middle segment, the left side bow segment, the right side bow segment, the left side stern segment and the right side stern segment from the bow to the stern; The wind shield segment division is that the wind shield section is divided according to the weight and the longitudinal unfolding size of the outer plate of the wind shield segment, the weight of each wind shield segment is not more than 100 tons, the longitudinal unfolding size of each wind shield segment is not more than 18 meters, the middle segment spans the left side and the right side of the ship, and the length of the middle segment is not more than 8 meters; The second step is to build each segment on an electric calculation jig after the segment division; Each wind shield segment is built on an electric calculation jig in the second step, the building method of each wind shield segment is the same, and the specific steps of building the wind shield segment on the electric calculation jig are that the outer plate of the wind shield segment is laid on the electric calculation jig and is subjected to line marking, the outer plate rib is pre-assembled on the outer plate according to the line marking position, the horizontal longitudinal girder on the outer plate is positioned and installed on the outer plate, the pre-assembled rib and the rib plate on the outer plate are sequentially installed and fixed, after the rib and the rib plate are sequentially and alternately installed, the small structural parts such as the elbow plate on the outer plate are installed on the outer plate, and finally the top plate and the eave plate are installed on the outer plate, so that the building of the wind shield segment is completed; The third step is to transport each wind shield segment to a total assembly platform and total assemble the wind shield segments into a wind shield section after the building of each wind shield segment is completed; The specific steps of total assembling the wind shield segments on the total assembly platform are that the wind shield section further comprises a bulwark segment, the built bulwark segment is placed on the total assembly platform with the panel of the bulwark segment facing upward, the middle segment is hoisted and positioned horizontally and centrally in the middle of the bulwark segment and is welded and fixed with the panel of the bulwark segment, the left side bow segment and the right side bow segment are hoisted on the two sides of the middle segment, the lower parts of the left side bow segment and the right side bow segment are connected with the bulwark segment, and finally the left side stern segment and the right side stern segment are hoisted to the bulwark segment, the bulwark segment is at the bottom of the wind shield, and the bulwark segment is welded and fixed with the bottoms of the middle segment, the left side bow segment, the right side bow segment, the left side stern segment and the right side stern segment, so that the total assembly of the wind shield segments is completed; The fourth step is to repair and polish the welds of the wind shield section and paint after the total assembly of the wind shield segments is completed; The wind shield section is built; The fifth step is to perform finite element modeling and hoisting deformation calculation on the wind shield section after the building of the wind shield section is completed, and to install reinforcing members and hoisting rings on the wind shield section according to the modeling and calculation results. The specific steps of the fifth step of the wind shield total section are: the wind shield and the bulwark section are segmented to establish a three-dimensional finite element structure model by using finite element software, and the boundary constraint conditions of the lifting point position are set on the established three-dimensional finite element structure model according to the overall structure lifting scheme of the wind shield total section, the lifting deformation of the wind shield total section is obtained by analyzing and calculating through the finite element software, and the structure at the deformed position is locally reinforced by the reinforcing member according to the deformation size and position of the wind shield total section; In the sixth step, after the reinforcing member and the lifting ring of the wind shield total section are installed, the wind shield total section is hoisted onto the ship and welded and fixed with the bow area deck, and the hoisting of the wind shield total section is completed.

2. A method of building a large windscreen section for a marine vessel according to claim 1, characterised in that, When the left side and the right side are hoisted and closed, the vertical weld between the left side and the right side and the middle section is welded and fixed first, and then the left side and the right side and the bulwark section are welded and fixed; after the vertical weld between the left side and the right side and the left side is welded and fixed, the left side and the bulwark section are welded and fixed, and after the vertical weld between the right side and the right side is welded and fixed, the right side and the bulwark section are welded and fixed, and the welding and fixing of all wind shield sections are completed.

3. A method of building a large windscreen section for a marine vessel according to claim 1, wherein, The reinforcing member of the wind shield total section in the fifth step is a 20# channel steel and a 22a type I-beam, and the reinforcing member is installed on the bulwark section, and the vertical distance between the reinforcing member and the bottom of the outer plate of the lower opening wind shield total section is 300 mm.

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