A method for rapid assembly of a complex structure of a ship without excess

Abstract

The application discloses a kind of ship complex structure no margin fast assembly method, belong to ship and ocean engineering construction technical field, the theoretical assembly position of complex structure and parent structure is sampled respectively in three-dimensional data, and is simulated assembly analysis in computer precision software, the construction deviation of parent structure itself is considered, and according to simulated assembly scheme, pre-cut is implemented, realizes large group stage no margin assembly;Assembly steps are as follows in turn: the formulation of three-dimensional point scheme;The sampling of parent structure assembly area three-dimensional coordinate data;The sampling of complex structure group three-dimensional coordinate data;Three-dimensional data simulation assembly is carried out to complex structure and parent structure;Pre-cut of complex structure;The assembly installation of complex structure.The method is through the process of "three-dimensional data acquisition→simulation assembly analysis→pre-cut→no margin assembly", replaces traditional "experience margin+high-altitude research cut" mode, to realize accurate positioning, reduce margin, reduce the goal of high-altitude operation.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding and marine engineering construction technology, specifically to a method for rapid assembly of complex ship structures without margin. Background Technology

[0002] In shipbuilding, some complex intermediate products (such as anchor towers) and the assembly hull structure (such as outer plating) both face significant risks of linear deformation. Traditional construction methods rely on "experience-based allowances": production design leaves substantial assembly allowances at the interface between the two, which are then corrected by trimmers during high-altitude assembly. This method generally suffers from the following problems:

[0003] Significant steel waste: Traditional positioning methods cannot predict the matching after structural deformation. To ensure accuracy, a large amount of allowance is required for each segment, increasing steel costs.

[0004] Low construction efficiency: The complex structure has an irregular shape and requires multiple rotations to adjust its posture. It relies on measurement data for repeated corrections, which is time-consuming and labor-intensive.

[0005] High safety risks: Trimming workers need to work at heights for long periods of time, and the cranes are occupied for extended periods, resulting in long assembly cycles and high operational risks. Summary of the Invention

[0006] The technical problem to be solved by this invention is to provide a method for rapid assembly of complex ship structures with no margin. The method replaces the traditional "experience-based margin + high-altitude cutting" mode with a process of "three-dimensional data acquisition → simulation assembly analysis → pre-cutting → no margin assembly". This method aims to achieve precise positioning, reduce margin, and reduce high-altitude operations, thereby solving problems such as unreasonable margin settings, excessive high-altitude operations, and low construction efficiency in traditional assembly.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A method for rapid assembly of complex ship structures without margin is proposed. Its core improvement lies in the following: the theoretical assembly positions of the complex structure (anchor platform) and the parent structure (outer plate) are sampled in three dimensions, and the assembly is simulated and analyzed in computer precision software. The construction deviation of the parent structure itself is taken into account, and pre-cutting is carried out according to the simulated assembly plan to achieve assembly without margin in the large group stage.

[0009] The specific assembly steps are as follows:

[0010] Step 1: Development of a 3D point construction plan;

[0011] The 3D point construction scheme includes a complex structure point construction design scheme and a parent structure point construction design scheme, with the management points of the two schemes corresponding one-to-one.

[0012] The management points for both schemes are evenly selected from the theoretical assembly positions of the complex structure and the parent structure. In the parent structure construction point design scheme, the management points are selected from the theoretical positions of each point on each contour section. In the complex structure construction point design scheme, the construction reference tread system is selected to transform the complex structure model and management points into construction postures.

[0013] Step 2: Sampling of three-dimensional coordinate data of the assembly area of ​​the parent structure;

[0014] After the assembly area structure is constructed and positioned, starting from the initial datum of the parent structure, the sampling point positions are determined and marked according to the distance markings in the parent structure point construction design scheme in the three-dimensional point construction scheme. Using a total station, a system is established based on the completed datum of the parent structure construction to complete the three-dimensional data sampling.

[0015] Step 3: Sampling of three-dimensional coordinate data for assembling complex structures;

[0016] After the construction of the complex structure is completed, the complex structure data is sampled using a total station according to the complex structure point design scheme in the three-dimensional point construction scheme.

[0017] Step 4: Perform three-dimensional data simulation and assembly of the complex structure and the parent structure;

[0018] In 3D precision software, the sampling data of complex structures is converted from the construction posture to the ship's normal state. The sampling data of the parent structure is then imported to implement simulated assembly, and the deviation of the measured data at the corresponding management points is analyzed.

[0019] Step 5: Pre-cutting of complex structures;

[0020] Based on the data deviation of the measured points at the corresponding installation positions of the complex structure and the parent structure in step four, analyze the fitting state between the complex structure and the parent structure, determine the pre-cutting amount, make the cutting points, connect them into a smooth curve, and perform pre-cutting of the complex structure on the line.

[0021] Step Six: Assembly and Installation of Complex Structures;

[0022] After pre-cutting, complex structures are assembled and positioned without margin.

[0023] The order of steps two and three above can be interchanged.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. Save steel costs: By summarizing deformation patterns through three-dimensional data, allowances are added to "conform to actual construction" to avoid excessive material retention in the traditional way;

[0026] 2. Reduce construction difficulty: Pre-cutting is moved from the "high-altitude assembly stage" to the "under-the-frame stage", eliminating the risks of high-altitude operations and reducing the occupation of cranes;

[0027] 3. Improve assembly efficiency: Virtual simulation enables precise assembly, avoiding multiple positioning and measurement in the later stages and shortening the construction cycle;

[0028] 4. Improve assembly accuracy: Millimeter-level pre-trimming + data simulation ensures accurate fitting of complex structures with the parent body, eliminating gap deviation problems. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 It is a contour section layout of the anchor abutment skirt;

[0031] Figure 2 It is a layout diagram of the anchorage management points (construction posture);

[0032] Figure 3 This is a layout diagram of the management points for the skirting board (construction posture);

[0033] Figure 4 It is the layout of management points on the outer plate of the anchor installation area. Figure 1 ;

[0034] Figure 5 It is the layout of management points on the outer plate of the anchor installation area. Figure 2 ;

[0035] Figure 6 It is the layout of management points on the outer plate of the anchor installation area. Figure 3 ;

[0036] Figure 7 It is the layout of management points on the outer plate of the anchor installation area. Figure 4 ;

[0037] Figure 8 This is a 3D sampling diagram of the outer plate anchorage installation area.

[0038] Figure 9 This is a three-dimensional sampling diagram of the anchor platform skirt panel;

[0039] Figure 10 This is a schematic diagram of the simulated assembly of the anchor platform and the outer plate. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Example 1, as Figures 1 to 10 As shown, a method for rapid assembly of complex ship structures without margin is proposed. Taking the complex structure as the anchor platform and the parent structure as the outer plate as an example, the theoretical assembly positions of the anchor platform and the outer plate are sampled in three dimensions, and the assembly is simulated and analyzed in computer precision software. The construction deviation of the outer plate itself is taken into account, and pre-cutting is carried out according to the simulated assembly plan to achieve assembly without margin in the large group stage.

[0042] The detailed assembly steps are as follows:

[0043] Step 1: Development of a 3D anchor point construction plan;

[0044] The three-dimensional anchor point establishment scheme includes the anchor skirt plate establishment design scheme and the anchor installation area outer plate establishment design scheme. The anchor skirt plate management points need to be evenly selected from the theoretical assembly positions of the anchor skirt plate and the outer plate, and the outer plate management points need to correspond to the anchor skirt plate management points.

[0045] Step 1 (1) Formulate the design scheme for anchor abutment skirt construction;

[0046] Step 1 (1-1): Establish horizontal sections (A-1 to A-10) every 700mm upwards and downwards from the theoretical hole center on the non-structural surface of the anchor plate, and mark the anchor plate skirt data management points by intersecting with the theoretical assembly position line; Note: Management points need to be set on the horizontal section (A-3) at the theoretical hole center position on the non-structural surface of the anchor chain cylinder, and the spacing between the upper and lower sections should be marked according to the actual distance.

[0047] Step 1 (1-2): Establish a vertical section (A-0) based on the projection line of the anchor centerline onto the non-structural surface of the outer plate. Mark the anchor platform skirt data management points by intersecting the theoretical assembly position line. Figure 1 As shown;

[0048] Step 1 (1-3): Using the center of the anchor panel's structural face as the origin, the major axis of the K-line of the structural face as the X-axis, and the minor axis of the M-line of the structural face as the Y-axis, with the panel's horizontal orientation as the reference, establish a system to convert the model and management points into actual construction postures, forming the anchor panel skirt point design scheme, such as... Figures 2 to 3 As shown.

[0049] Step 1 (2): Formulate the anchor installation point construction plan for the outer plate of the anchor platform installation area;

[0050] Step 1 (2-1): Establish management points corresponding to the anchor abutment skirt on the non-structural surface of the outer plate of the anchor installation area;

[0051] Step 1 (2-2): Using the intersection of the projection line of the anchor centerline on the non-structural surface of the outer plate and the horizontal section as a reference, mark the extended distance of the theoretical positions of each management point on both sides to form a design point construction scheme for the outer plate of the anchor installation area, such as... Figures 4 to 7 As shown; where the intersection of the projection line Y of the anchor center line on the non-structural surface of the outer plate and the horizontal plane A-8 is point O, the intersection of the projection line Y of the anchor center line on the non-structural surface of the outer plate and the horizontal plane A-9 is point P, and the intersection of the projection line Y of the anchor center line on the non-structural surface of the outer plate and the horizontal plane A-10 is point Q.

[0052] Step 2: Data sampling of the outer plate of the anchor assembly area, such as... Figure 8 As shown;

[0053] Step 2 (1) Confirmation of the reference hole center;

[0054] Step 2 (1-1): After the anchor system assembly area is fitted onto the outer plate and meets the positioning accuracy requirements, use a total station S to vertically project the anchor system centerline onto the non-structural surface of the outer plate, which is the A-0 section.

[0055] Step 2 (1-2): Based on the assembly drawing data, use a total station S to lay out the corresponding height value on the anchor system centerline projection line R, and determine the theoretical hole center position of the anchor chain cylinder on the non-structural surface of the outer plate.

[0056] Step 2 (2): Confirm the location of the sampling point;

[0057] Step 2 (2-1): Using the center of the hole as a reference, according to the three-dimensional anchor point construction scheme, use the total station S to lay out the horizontal profile lines of each section;

[0058] Step 2 (2-2): Using the intersection of the horizontal profile line and the projection line of the anchor center line as a reference, measure the corresponding measurement points on both sides to find the location of the outer plate management point in the anchor assembly area and mark it.

[0059] Step 2 (3), 3D data sampling;

[0060] The system was established based on segmented three-dimensional references ①, ②, and ③, and three-dimensional data of each management point was sampled using a total station.

[0061] Figure 4 The letters in the text are represented as follows:

[0062] Point A: The theoretical center of the anchor chain cylinder on the non-structural surface of the outer plate;

[0063] Point B: The theoretical center of the non-structural surface of the anchor plate;

[0064] H: Horizontal section spacing (vertical distance);

[0065] A-0: The projection line of the anchor centerline onto the non-structural surface of the outer plate;

[0066] L1, L2: The extended distance of the anchor centerline projection line from the management point;

[0067] ②, ③: Segmented three-dimensional analysis benchmarks.

[0068] Step 3: Anchor erection data sampling, such as... Figure 9 As shown;

[0069] Step 3 (1) Pre-shifting of the reference axis;

[0070] To prevent the long and short axes of the anchor plate from being obscured by the stiffening plate during the assembly completion stage, after the anchor plate is leveled, the theoretical lines of the long and short axes are pre-shifted to one side by 100mm and marked.

[0071] Step 3 (2) Three-dimensional data sampling;

[0072] Step 3 (2-1): Set up a total station on the anchor assembly panel, with the long axis of the K line of the panel structure surface as the X-axis, the short axis of the M line of the panel structure surface as the Y-axis, and the panel level as the reference to establish a system.

[0073] Step 3 (2-2): Based on the anchor abutment skirt data, establish the point design scheme, use a total station to lay out and mark the points;

[0074] Step 3 (2-3): Measure and record the distance from the sampling point to the free end of the anchor skirt.

[0075] Step 4: Anchor platform assembly and three-dimensional simulation assembly of the outer plate, such as... Figure 10 As shown;

[0076] Step 4 (1) Analyze the angle status of the anchor skirt and the accuracy status of the outer plate line based on the deviation of the measured data at each point;

[0077] Step 4 (2): In the DACS precision software OFFICE module, use the three-point movement operation to change the anchor assembly model and management point from the construction posture to the ship's normal posture.

[0078] Step 4 (3): Import the anchor assembly sampling data and the anchor installation area outer plate sampling data into the SIM module of the DACS precision software respectively. The model and the measured points are distinguished by different colors. Measure the measured deviation of each sampling point and analyze the fitting state.

[0079] Step 5: Anchor platform assembly and pre-cutting;

[0080] Step 5 (1) Based on the fitting state of the actual measured data of the anchor assembly and the corresponding sampling points of the outer plate, fine-tune the sampling points on the anchor skirt, make the actual pre-repair cutting points and return to the non-structural surface of the anchor skirt;

[0081] Step 5 (2): Mark each trimming point on the non-structural surface of the skirt and mark it with a 100MK line along the skirt to facilitate subsequent trimming data collection;

[0082] Step 5 (3): Connect the pre-cutting points into a smooth curve, and according to the bevel form in the drawing, perform pre-cutting by assembling anchors.

[0083] Step 6: Anchor platform assembly and installation;

[0084] Step 6 (1) After the anchor lip is installed on the anchor platform, the upper group of jigs is positioned so that the anchor platform panel is correctly attached to the lower end section of the lower anchor chain cylinder and the skirt plate is correctly attached to the outer plate.

[0085] Step 6 (2): Use a total station to measure the coordinates of the intersection point (uncut) of the outer ring of the non-structural surface of the anchor plate with the long axis K and the intersection point (uncut) of the outer ring of the non-structural surface of the plate with the short axis M. Compare the obtained coordinates with the theoretical values. The error is ≤6mm.

[0086] Step 7: Collection of actual trimming data;

[0087] After the anchor platform is assembled and positioned to meet the accuracy deviation requirements, the actual trimming amount at each sampling point is collected, and data for each ship type is accumulated.

[0088] Example 2: The only difference between this example and Example 1 is that the order of steps 2 and 3 in Example 1 is reversed.

[0089] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for rapid assembly of complex ship structures without margin, characterized in that: The theoretical assembly positions of the complex structure and the parent structure are sampled in three dimensions, and the assembly is simulated and analyzed in computer precision software. The construction deviation of the parent structure itself is taken into account, and pre-cutting is carried out according to the simulated assembly plan to achieve zero-margin assembly in the large group stage. The assembly steps are as follows: Step 1: Development of a 3D point construction plan; The 3D point construction scheme includes a complex structure point construction design scheme and a parent structure point construction design scheme, with the management points of the two schemes corresponding one-to-one. Step 2: Sampling of three-dimensional coordinate data of the assembly area of ​​the parent structure; After the assembly area structure is built and positioned, starting from the initial datum of the parent body, the sampling point positions are determined and marked according to the distance markings in the parent structure point design scheme in the three-dimensional point building scheme. Using a total station, a system is established based on the completed datum of the parent structure construction to complete the three-dimensional data sampling. Step 3: Sampling of three-dimensional coordinate data for assembling complex structures; After the construction of the complex structure is completed, the complex structure data is sampled using a total station according to the complex structure point design scheme in the three-dimensional point construction scheme. Step 4: Perform three-dimensional data simulation and assembly of the complex structure and the parent structure; In 3D precision software, the sampling data of complex structures is converted from the construction posture to the ship's normal state, the sampling data of the parent structure is imported to implement simulated assembly, and the deviation of the measured data of the corresponding management points is analyzed. Step 5: Pre-cutting of complex structures; Based on the data deviation of the measured points at the corresponding installation positions of the complex structure and the parent structure in step four, analyze the fitting state between the complex structure and the parent structure, determine the pre-cutting amount, make the cutting points, connect them into a smooth curve, and perform pre-cutting of the complex structure on the line. Step Six: Assembly and Installation of Complex Structures; After pre-cutting, complex structures are assembled and positioned without margin. The order of steps two and three above can be interchanged.

2. The method for rapid assembly of complex ship structures without margins according to claim 1, characterized in that: The management points of the two schemes are evenly selected from the theoretical assembly positions of the complex structure and the parent structure. In the parent structure construction point design scheme, the management points are selected from the theoretical positions of each point on each contour section.

3. The method for rapid assembly of complex ship structures without margins according to claim 1, characterized in that: The complex structure construction point design scheme selects the construction reference tread system to transform the complex structure model and management points into construction postures.

4. The method for rapid assembly of complex ship structures without margins according to claim 1, characterized in that: The complex structure is the anchor platform, and the parent structure is the outer plate.

Images