CN111924066B - Shipbuilding method capable of being carried quickly and one-time ship moving positioning method for ship - Google Patents
Shipbuilding method capable of being carried quickly and one-time ship moving positioning method for ship Download PDFInfo
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- CN111924066B CN111924066B CN202010661890.6A CN202010661890A CN111924066B CN 111924066 B CN111924066 B CN 111924066B CN 202010661890 A CN202010661890 A CN 202010661890A CN 111924066 B CN111924066 B CN 111924066B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
- B63B71/10—Designing vessels; Predicting their performance using computer simulation, e.g. finite element method [FEM] or computational fluid dynamics [CFD]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B73/00—Building or assembling vessels or marine structures, e.g. hulls or offshore platforms
Abstract
The invention relates to the technical field of ship construction, and provides a shipbuilding method capable of being carried quickly, which specifically comprises the following steps: establishing an actually carried dock three-dimensional coordinate system; the ship theoretical three-dimensional coordinate system is associated with the carried dock three-dimensional coordinate system; carrying out segmented construction without surplus; comparing and analyzing the segmented three-dimensional design model and the actually measured segmented three-dimensional data, and rectifying and modifying problem data; the segmented theoretical three-dimensional coordinate system is associated with the segmented actual measurement three-dimensional coordinate system; importing the rectified data into DACS software for simulation carrying analysis, and processing the allowance of a closure opening and the structural involution dislocation in advance; and carrying out actual carrying according to the three-dimensional carrying positioning data. The invention achieves the purposes of rapid carrying and lean shipbuilding by using a dock three-dimensional coordinate system. The invention also provides a one-time ship moving positioning method for the ship, which collects related data by using a dock three-dimensional coordinate system and guides the completion of one-time ship moving positioning pier, and has the advantages of simple operation and short period.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to a shipbuilding method capable of being carried quickly and a one-time ship-moving positioning method for a ship.
Background
Ocean engineering equipment and high-technology ships are one of ten major development fields, shipbuilding is a representative of national strategic equipment manufacturing industry, and the ship industry in China already forms a basic advantage with strong international competitiveness. In 2016, the ship industry enters the winter, the competition of the shipbuilding market is increasingly violent, a plurality of civil and national shipbuilding enterprises close, and the ship industry prospect is great. The shipping market is tragic, and shipowners keep looking at the shipping market and ship construction, and carry out strategies such as default, ship abandonment and delayed delivery on the constructed ships so as to counteract the influence of economic crisis on the shipping industry.
In the face of crisis, adopting more advanced technology to break through is one of the choices of enterprises. The digital shipbuilding is a technology which is based on knowledge fusion in the shipbuilding process, applies a modular construction technology, a collaborative manufacturing technology, a simulation construction technology and an assembly technology according to the specialized production principle of intermediate product organization, realizes integrated manufacturing of ship shells, outfitting and coating, and achieves quick manufacturing and lean building of ship products.
The digital shipbuilding technology covers a wide range, and the dock three-dimensional embarkation technology is a category of digital shipbuilding. The three-dimensional carrying of the dock is a novel shipbuilding technology which is innovated by measuring simulation analysis, total simulation and carrying analysis in the whole process of design planning and sectional construction on the basis of fusing a digital shipbuilding technology, combining the actual carrying of the ship dock, and utilizing the three-dimensional intelligentization technology and the like.
At present, a dock carrying coordinate system is generally two-dimensional, height is measured by manually enlarging a ruler, a plumb bob is used for checking port levelness, and laser theodolite is used for auxiliary measurement of half-width data, so that the process is complicated, more procedures are easy to make mistakes, and the measurement precision is not high.
After the actual carrying of the ship is completed, the ship needs to be moved to complete the subsequent process section. The conventional secondary ship moving positioning method has the disadvantages of complex operation process, high energy consumption, high manpower and material resource investment, higher production cost, long ship moving period and low efficiency.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, thereby providing a shipbuilding method capable of carrying quickly and further providing a one-time ship moving and positioning method for a ship.
In order to achieve the technical effects, the invention adopts the following technical scheme:
a shipbuilding method capable of being carried quickly comprises the following steps:
establishing an actually carried dock three-dimensional coordinate system;
according to a ship theoretical three-dimensional coordinate system formed after a ship is molded in a design stage, theoretical three-dimensional coordinates of the ship X, Y, Z correspond to actual three-dimensional coordinates X, Y, Z of a dock one by one, so that the ship theoretical three-dimensional coordinate system is associated with the actually carried dock three-dimensional coordinate system;
collecting process data of each procedure stage of the segmented construction process, carrying out comparative analysis on the process data, and determining the segmentation allowance adding and discharging amount according to an analysis result;
measuring actual measurement segmented three-dimensional data through a total station, carrying out contrastive analysis on an existing segmentation theory three-dimensional design model and the actual measurement segmented three-dimensional data to obtain a deviation value and a linear deviation value of the actual measurement segmented three-dimensional data, judging the state of the segments according to the shipbuilding quality standard, rectifying and reforming the segments which do not meet the shipbuilding quality standard to obtain first segmented state data;
according to a segmentation theory three-dimensional coordinate system formed by a segmentation theory three-dimensional design model, a segmentation theory X, Y, Z three-dimensional coordinate corresponds to a segmentation actual three-dimensional X, Y, Z coordinate one by one, so that the segmentation theory three-dimensional coordinate system is associated with a segmentation actual measurement three-dimensional coordinate system;
importing the first segmentation state data into a segmentation theoretical three-dimensional coordinate system, carrying out simulation carrying analysis to obtain a deviation value of a closure opening, carrying out allowance cutting and/or structure dislocation rectification on a defective closure opening according to the deviation value, and obtaining second segmentation state data after processing;
and sorting out the three-dimensional carrying positioning data of the key points according to the second section state data, and carrying out actual carrying according to the three-dimensional carrying positioning data.
Preferably, the specific steps of establishing the actually carried dock three-dimensional coordinate system are as follows:
step 1.1: measuring the central position of the width of a dock by using a total station, measuring a plurality of central mark points on a bow, a midship and a stern of the dock bottom, and connecting the central mark points to draw a center line of a ground sample;
step 1.2: selecting an optional point which is positioned on one side of a ground sample central line and is positioned outside a ship bottom and reaches a dock wall as a first dock bottom mark point, drawing a plurality of dock bottom mark points on the same side according to the vertical distance from the first dock bottom mark point to the ground sample central line, and connecting the dock bottom mark points to draw a half-width line of the dock bottom; the other half-width line of the dock bottom is arranged on the other side of the center line of the ground sample, and the two half-width lines of the dock bottom are symmetrically arranged relative to the center line of the ground sample;
step 1.3: selecting an optional point on the docking edge on one side of the ground sample central line as a first docking edge marking point, drawing a plurality of docking edge marking points on the same side according to the vertical distance from the first docking edge marking point to the ground sample central line, and connecting the docking edge marking points to draw a docking edge half-width line; the other half width line of the dock edge is arranged on the other side of the center line of the ground sample, and the two half width lines of the dock edge are symmetrically arranged relative to the center line of the ground sample;
step 1.4: measuring a first FR0 rib position at the position of the ground sample center line by using a total station according to the length data of the ship, measuring a plurality of FR0 rib positions perpendicular to the ground sample center line at the left side and the right side of the first FR0 rib position, and drawing an FR0 rib position line perpendicular to the ground sample center line by connecting FR0 rib positions; measuring size data of a joint of a ship section and a main section from a first FR0 rib site on a ground sample central line by using a total station, reflecting the size data to a dock bottom half-width line and a dock side half-width line by using the total station, and drawing a joint port line;
step 1.5: according to the ship height data, measuring deflection data of a ship by using a total station, determining a ship height baseline, respectively reflecting the height baseline to a height reference of a dock bottom and a height reference of a dock edge by using the total station, and determining an auxiliary baseline of the dock bottom and an auxiliary height baseline of the dock edge from the height reference.
Preferably, the specific steps of performing comparative analysis on the process data and determining the segmentation allowance adding and discharging amount according to the analysis result are as follows:
step 2.1: measuring data before and after the welding process section, and comparing to obtain welding shrinkage data;
step 2.2: measuring data before and after the fire-tuning process section, and comparing to obtain fire-tuning shrinkage data;
step 2.3: measuring data before and after the lifting and consignment process section, and comparing to obtain lifting and consignment change data;
step 2.4: and determining the adding and releasing amount of the segmentation allowance according to the welding shrinkage data, the fire-tuning shrinkage data and the lifting and consignment change data.
Preferably, the step of comparing and analyzing the three-dimensional design model according to the existing segmentation theory with the actually measured segmentation three-dimensional data comprises the following specific steps:
step 3.1: deriving a corresponding segmentation theory three-dimensional design model from an existing shipbuilding database;
step 3.2: importing the segmented theoretical three-dimensional design model into precision analysis software DACS and setting segmented three-dimensional data theoretical points;
step 3.3: and importing the actually measured segmented three-dimensional data into a segmented theoretical three-dimensional design model of precision analysis software DACS, and performing precision adjustment analysis to obtain a deviation value and a linear deviation value of the actually measured segmented three-dimensional data.
Preferably, the method further comprises the steps of: the shipbuilding database system is built according to the data of the shipbuilding process, and the shipbuilding database system is used for carrying out feedback adjustment on the shipbuilding process, and the method specifically comprises the following steps:
step 4.1: collecting data of a ship building process;
step 4.2: arranging data of the ship building process;
step 4.3: analyzing data of the ship building process;
step 4.4: and feeding back the analysis result to each process section of the ship construction.
Preferably, the specific steps of step 4.3 are:
analyzing the collected residual data, the collected inverse deformation data, the collected compensation data and the collected flatness data by using an Excel tool to obtain a first result;
utilizing a Tribon to model and analyze the collected modeling stress data to obtain a second result;
carrying out simulation analysis on the segmented data and the total segment data measured by the total station by using DACS software to obtain a third result;
analyzing the collected precision data and the collected process data by utilizing CAD (computer aided design) modeling to obtain a fourth result;
and automatically analyzing the collected precision report data by using a data management and control platform to obtain a fifth result.
Preferably, the method further comprises the steps of: and (3) carrying out ship main scale measurement and water gauge marking by adopting a dock three-dimensional coordinate system and a total station.
Preferably, the dock bottom half-width line and the dock side half-width line are both provided with a marking component.
The invention also provides a one-time ship moving positioning method for the ship, which comprises the following steps:
collecting bottom flatness data of a plurality of ships at each stage during the construction of the dock according to an actually carried dock three-dimensional coordinate system in the process of constructing the ships;
obtaining flatness change rules of the plurality of ships at each stage when the dock is built according to the collected bottom flatness data of the plurality of ships at each stage when the dock is built;
analyzing the secondary ship moving and pier sitting process according to the flatness change rule of each stage when a plurality of ships are built in the dock to obtain a primary ship moving and pier sitting process;
determining inverse deformation data carried in a section area of a dock according to flatness change rules of a plurality of ships in each section when the dock is built;
determining the height inverse deformation data of the docking blocks in the dock two-stage area according to the flatness change rule of each stage when a plurality of ships are built in the dock;
controlling the flatness of the bottom of the ship in the segmented construction process according to the carried inverse deformation data of the first-stage region of the dock and the height inverse deformation data of the docking blocks of the second-stage region of the dock;
and performing primary ship moving positioning pier sitting through the difference analysis condition of the area of the first stage before the ship moving and the area of the second stage after the ship moving.
Preferably, the concrete steps of positioning the sitting pier for one-time ship transfer are as follows:
step 5.1: collecting length, width and height three-dimensional data in the building process of the ship B according to an actually carried dock three-dimensional coordinate system;
step 5.2: floating the ship A and the ship B in situ according to an actually carried dock three-dimensional coordinate system;
step 5.3: undocking the ship A according to an actually carried dock three-dimensional coordinate system, and keeping the ship B in place;
step 5.4: controlling a ship B by using an actually carried dock three-dimensional coordinate system according to the length, width and height three-dimensional data, directly moving the ship B to a two-stage area, pumping water to the dock, and sitting on the pier after positioning;
step 5.5: and (4) draining the water of the dock, and finishing the carrying of the ship C in the first-stage area by using the actually carried three-dimensional coordinate system of the dock.
The invention has the beneficial effects that:
the corresponding segmented three-dimensional model is derived through the shipbuilding database, segmented data are collected after segmented construction to form actually measured segmented three-dimensional data, the actually measured segmented three-dimensional data are compared with the theoretical segmented three-dimensional model for analysis, comprehensive precision management and control can be carried out on the segmented state, and data of which the segmented state exceeds the error range are processed in advance; in the subsequent simulation carrying process, the rectified and rectified actual measurement segmented three-dimensional data can be imported into a theoretical three-dimensional model in precision analysis software DACS for simulation analysis, allowance cutting is guided to the closure opening containing allowance before carrying, the closure opening structure is rectified and staggered in advance when the closure opening structure is relatively large in dislocation, and the closure opening allowance and the structure closure dislocation are processed in advance; in addition, segmented state data after matching is simulated in the precision analysis software DACS, three-dimensional carrying positioning data of key points are arranged for determining the state in the actual carrying of the dock for use, a specially-assigned person carries out tracking guidance in the carrying process of the dock, the actual carrying state is ensured to be consistent with the simulated state in the precision analysis software DACS, the purposes of rapid carrying and lean shipbuilding are achieved, the one-time in-place hoisting can be realized, and the phenomena of allowance trimming and cutting and structure dislocation overproof basically do not exist.
When the ship is moved and positioned, the secondary ship moving is adjusted to be the primary ship moving, so that the primary dock water pumping and draining processes are reduced, the primary pier re-arranging process is reduced, the primary in-situ pier sitting and positioning process is reduced, the operation flow is simplified, and the ship moving period is shortened. In addition, the actually carried dock three-dimensional coordinate system is used for carrying out one-time ship moving, ship moving data can be accurately controlled, so that the ship is accurately positioned, a large amount of manpower and material resources are saved, and energy consumption is saved.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
FIG. 1 is a flow chart of the ship embarkation steps of the present invention;
FIG. 2 is a schematic representation of a three dimensional coordinate plane of a dock of the present invention;
FIG. 3 is a three dimensional coordinate cross section of the dock of the present invention;
FIG. 4 is a flow chart of the shipbuilding database system of the present invention
FIG. 5 is a flow chart of a single ship-moving step of the present invention;
fig. 6 is a schematic view of a primary ship moving process according to the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The present invention will be described in further detail below with reference to specific embodiments and with reference to the accompanying drawings.
The invention provides a shipbuilding method capable of carrying quickly, the flow chart of the method is shown in figure 1, figure 2 is a schematic diagram of a three-dimensional coordinate plane constructed by a dock, figure 3 is a cross-sectional view of the three-dimensional coordinate constructed by the dock, and the method specifically comprises the following steps:
and establishing an actually carried dock three-dimensional coordinate system.
The method for establishing the actually carried dock three-dimensional coordinate system comprises the following steps:
step 1.1: and measuring the central position of the width of the dock by using a total station, measuring a plurality of central mark points on the midship and the stern of the bottom of the dock, and connecting the central mark points to draw a center line of the ground sample. The center line of the ground sample is the x axis of the dock three-dimensional coordinate system.
The main size data of the dock and the ship are known in advance, and the main size data of the ship is as follows: length × width × height data is 179m × 30m × 15 m; dock master size data: length × width × height data is 400m × 40m × 10 m.
Step 1.2: selecting an optional point which is positioned on one side of a ground sample central line and is positioned outside a ship bottom and reaches a dock wall as a first dock bottom mark point, drawing a plurality of dock bottom mark points on the same side according to the vertical distance from the first dock bottom mark point to the ground sample central line, and connecting the dock bottom mark points to draw a half-width line of the dock bottom; the other half-width line of the dock bottom is arranged on the other side of the center line of the ground sample, and the two half-width lines of the dock bottom are symmetrically arranged relative to the center line of the ground sample.
Preferably, the vertical distance between the first dock bottom mark point and the ground sample central line is 15400 mm.
Preferably, the distance to the dock wall outside the bottom of the vessel comprises the dock wall itself.
Step 1.3: selecting an optional point on the docking edge on one side of the ground sample central line as a first docking edge marking point, drawing a plurality of docking edge marking points on the same side according to the vertical distance from the first docking edge marking point to the ground sample central line, and connecting the docking edge marking points to draw a docking edge half-width line; the other half width line of the dock margin is arranged on the other side of the center line of the ground sample, and the two half width lines of the dock margin are symmetrically arranged relative to the center line of the ground sample.
Preferably, the first docket edge marking point is a perpendicular distance of 23000mm from the ground sample centerline.
Preferably, the dock bottom half-width line and the dock side half-width line are both provided with a marking component. Preferably, the marking member may be a metal block or a metal strip. Preferably, the marking means may also be a coordinate system marker post. The marking component is convenient to be used as a foreign flushing point and a paint mark, is not easy to fade when being washed by rain, and can be used for a long time.
Step 1.4: measuring a first FR0 rib position at the position of the ground sample center line by using a total station according to the length data of the ship, measuring a plurality of FR0 rib positions perpendicular to the ground sample center line at the left side and the right side of the first FR0 rib position, and drawing an FR0 rib position line perpendicular to the ground sample center line by connecting FR0 rib positions; measuring size data of a joint of a ship section and a main section from a first FR0 rib site on a ground sample central line by using a total station, reflecting the size data to a dock bottom half-width line and a dock side half-width line by using the total station, and drawing a joint port line. The rib position line of the FR0 is the y axis of the three-dimensional coordinate system of the dock.
Step 1.5: according to the ship height data, measuring deflection data of a ship by using a total station, determining a ship height baseline, respectively reflecting the height baseline to a height reference of a dock bottom and a height reference of a dock edge by using the total station, and determining an auxiliary baseline of the dock bottom and an auxiliary height baseline of the dock edge from the height reference.
Preferably, the height of the dock bottom is-450 mm, and the height of the dock edge is +11300 mm.
At this time, a three-dimensional coordinate system constructed by the dock and the side of the dock is established, as shown in fig. 2 and 3. The establishment of a three-dimensional coordinate system is convenient for technicians to monitor all dimensional data of ship construction in real time at the dock bottom and the dock edge, scientific support is provided for fast carrying and lean shipbuilding, and a foundation is provided for one ship moving operation after the ship is actually carried.
According to a ship theoretical three-dimensional coordinate system formed after the ship is molded in the design stage, theoretical three-dimensional coordinates of the ship X, Y, Z correspond to actual three-dimensional coordinates X, Y, Z of the dock one by one, and the ship theoretical three-dimensional coordinate system is related to the actually carried dock three-dimensional coordinate system.
The precision analysis software DACS mainly comprises the following functions: comprehensively analyzing data of each port of the subsection and the total section, linear deviation data of the curved surface, flatness data and the like; simulating total assembly and simulated carrying analysis by the segmentation/total segment, and predicting involution and residual data of the closure opening in advance, which is a problem obstacle of no residual carrying and quick carrying and clearing of the closure opening; and (4) data statistics and analysis, namely sorting and analyzing the occurrence frequency and severity of the out-of-tolerance data according to the problem type, month, year and other modes, and providing guidance for subsequent segmented construction.
And (3) introducing the theoretical three-dimensional model into the DACS to form the ship theoretical three-dimensional coordinate system, and introducing the actually carried dock three-dimensional coordinate system into the theoretical ship coordinate system, namely, in the segmented actual carrying process, the theoretical X, Y, Z three-dimensional coordinate and the actual X, Y, Z coordinate of the dock are in one-to-one correspondence, so that the unification of theory and practice is realized, and the site construction and the comprehensive monitoring are facilitated.
And collecting process data of each process stage of the segmented construction process, carrying out comparative analysis on the process data, and determining the segmentation allowance adding and releasing amount according to an analysis result.
The specific steps of carrying out process data comparison and analysis and determining the segmentation allowance adding and discharging amount according to the analysis result are as follows:
step 2.1: measuring data before and after the welding process section, and comparing to obtain welding shrinkage data;
step 2.2: measuring data before and after the fire-tuning process section, and comparing to obtain fire-tuning shrinkage data;
step 2.3: measuring data before and after the lifting and consignment process section, and comparing to obtain lifting and consignment change data;
step 2.4: and determining the adding and releasing amount of the segmentation allowance according to the welding shrinkage data, the fire-tuning shrinkage data and the lifting and consignment change data.
Building the segment with allowance, and increasing subsequent hoisting time and allowance cutting time; the assembly process is repaired and cut, polishing time, assembly time and hoisting time are increased, the improvement of construction efficiency is influenced, material waste is caused, and environmental pollution is aggravated. The construction without margin can save cost, reduce pollution to the environment, improve production efficiency and provide a better basis for subsequent carrying without margin. The method comprises the steps of investigating each process stage of the segmentation construction process, collecting data in the process, determining segmentation margin arrangement after optimization analysis, increasing the construction number of margin-free segments, and promoting the segmentation margin-free construction to the maximum extent. On the basis of the subsection no-allowance construction, the subsection no-allowance carrying degree is correspondingly improved, and finally the purposes of no-allowance construction and carrying are achieved.
The method comprises the steps of obtaining actually-measured segmented three-dimensional data through a total station, carrying out contrastive analysis on an existing segmentation theory three-dimensional design model and the actually-measured segmented three-dimensional data to obtain a deviation value and a linear deviation value of the actually-measured segmented three-dimensional data, judging the state of the segments according to a shipbuilding quality standard, rectifying and modifying the segments which do not accord with the shipbuilding quality standard, and obtaining first segmented state data.
The method comprises the following specific steps of carrying out contrastive analysis on the existing segmentation theory three-dimensional design model and the actually measured segmentation three-dimensional data:
step 3.1: deriving a corresponding segmentation theory three-dimensional design model from an existing shipbuilding database;
step 3.2: importing the segmented theoretical three-dimensional design model into precision analysis software DACS and setting segmented three-dimensional data theoretical points;
step 3.3: and importing the actually measured segmented three-dimensional data into a segmented theoretical three-dimensional design model of precision analysis software DACS, and performing precision adjustment analysis to obtain a deviation value and a linear deviation value of the actually measured segmented three-dimensional data.
The theoretical point of setting the segmentation theoretical three-dimensional design model is to conveniently compare and analyze segmented data actually measured by the total station, introduce the actually measured segmented three-dimensional data into a theoretical model of precision analysis software DACS, carry out maximum matching and comparison on the segmented actually measured data and the segmented theoretical data through rigorous precision adjustment and analysis to obtain a three-dimensional data deviation value and a linear deviation value, and carry out rectification and modification according to the data exceeding the error range. If the allowance exists, cutting the allowance; if the alignment exceeds the allowable error, for example, the left-right alignment exceeds the allowable error, the position of the segment exceeding the allowable error is adjusted to be close to the theoretical value. After the rectification treatment, a specially-assigned person can track and check, and the segmented state is ensured to meet the requirements.
And according to a segmentation theory three-dimensional coordinate system formed by the segmentation theory three-dimensional design model, corresponding the segmentation theory X, Y, Z three-dimensional coordinate to the segmentation actual three-dimensional X, Y, Z coordinate one by one, so that the segmentation theory three-dimensional coordinate system is associated with the segmentation actual measurement three-dimensional coordinate system.
The segmented theoretical three-dimensional coordinate system is obtained from the segmented three-dimensional design model, the segmented three-dimensional model is derived from the shipbuilding precision database, and the segmented actual measurement coordinate system is obtained from the first segmented state data.
And importing the first segmentation state data into a segmentation theoretical three-dimensional coordinate system, carrying out simulation carrying analysis to obtain a deviation value of a closure opening, carrying out allowance cutting and/or structure dislocation rectification on the defective closure opening according to the deviation value, and processing to obtain second segmentation state data.
The carrying analysis is simulated, the allowance and the structure involution condition of the segment carrying closure opening can be predicted in advance, and the data of the segment closure opening can be optimized after the allowance and the structure involution dislocation of the closure opening are processed in advance.
And sorting out the three-dimensional carrying positioning data of the key points according to the second section state data, and carrying out actual carrying according to the three-dimensional carrying positioning data.
The three-dimensional carrying and positioning data of the key points can ensure that the actual carrying state is consistent with the simulation state in the analysis software, achieve the purposes of carrying quickly and building ships in a lean way, realize the once-in-place hoisting, and basically have no phenomena of allowance trimming and structural dislocation.
As shown in fig. 4, further comprising the steps of: the shipbuilding database system is built according to the data of the shipbuilding process, and the shipbuilding database system is used for carrying out feedback adjustment on the shipbuilding process, and the method specifically comprises the following steps:
step 4.1: collecting data of a ship building process;
step 4.2: arranging data of the ship building process;
step 4.3: analyzing data of the ship building process;
step 4.4: and feeding back the analysis result to each process section of the ship construction.
Preferably, the specific steps of step 4.3 are:
analyzing the collected residual data, the collected inverse deformation data, the collected compensation data and the collected flatness data by using an Excel tool to obtain a first result;
utilizing a Tribon to model and analyze the collected modeling stress data to obtain a second result;
carrying out simulation analysis on the segmented data and the total segment data measured by the total station by using DACS software to obtain a third result;
analyzing the collected precision data and the collected process data by utilizing CAD (computer aided design) modeling to obtain a fourth result;
and automatically analyzing the collected precision report data by using a data management and control platform to obtain a fifth result.
The shipbuilding database system comprises:
the data collection module is used for collecting data of the ship building process;
the data arrangement module is used for arranging data of the ship building process;
a data analysis module, the data analysis module comprising:
the Excel tool analysis module is used for analyzing the collected residual data, the collected inverse deformation data, the collected compensation data and the collected flatness data;
the Tribon modeling stress analysis module is used for analyzing the collected modeling stress data;
the DACS software simulation analysis module is used for analyzing the subsection data and the total subsection data measured by the total station;
the CAD modeling analysis module is used for analyzing the collected precision data and the collected process data;
and the data management and control platform module is used for analyzing the collected precision report and check data.
The shipbuilding database system also comprises a data application module which is used for feeding back the analysis result to each process section of shipbuilding.
Along with the accumulation of basic data quantity in a database, the fusion and connection among systems, the perfection of the process and the improvement of the technology, the shipbuilding database system solves the process defects and the technical problems existing in the construction process. Namely, data collection, analysis and measure optimization are carried out on the precision conditions of each procedure process of shipbuilding, the subsequent construction mode and method are improved, and the construction quality and the construction efficiency are improved.
Further comprising the steps of: and (3) carrying out ship main scale measurement and water gauge marking by adopting a dock three-dimensional coordinate system and a total station.
Through the research on the aspect of intelligentization of digital shipbuilding, the main scale measurement and the water gauge marking of the ship are optimized. A dock three-dimensional coordinate system and a three-dimensional total station are adopted to carry out accurate and rapid measurement on a group of 2 persons, the problems of measurement of the main dimension of a ship and marking of a water gauge by multiple persons, multiple machines and multiple processes in the past are solved, manpower and material resources are saved, and the safety of construction and inspection is improved.
The invention also provides a ship once-moving positioning method comprising the shipbuilding method capable of being carried quickly, the flow chart of the steps is shown in figure 5, the flow chart is shown in figure 6, and the method comprises the following steps:
collecting bottom flatness data of a plurality of ships at each stage during the construction of the dock according to an actually carried dock three-dimensional coordinate system in the process of constructing the ships;
obtaining flatness change rules of the plurality of ships at each stage when the dock is built according to the collected bottom flatness data of the plurality of ships at each stage when the dock is built;
analyzing the secondary ship moving and pier sitting process according to the flatness change rule of each stage when a plurality of ships are built in the dock to obtain a primary ship moving and pier sitting process;
determining inverse deformation data carried in a section area of a dock according to flatness change rules of a plurality of ships in each section when the dock is built;
determining the height inverse deformation data of the docking blocks in the dock two-stage area according to the flatness change rule of each stage when a plurality of ships are built in the dock;
controlling the flatness of the bottom of the ship in the segmented construction process according to the carried inverse deformation data of the first-stage region of the dock and the height inverse deformation data of the docking blocks of the second-stage region of the dock;
and performing primary ship moving positioning pier sitting through the difference analysis condition of the area of the first stage before the ship moving and the area of the second stage after the ship moving.
The concrete steps of carrying out one-time ship moving and positioning pier sitting are as follows:
step 5.1: collecting length, width and height three-dimensional data in the building process of the ship B according to an actually carried dock three-dimensional coordinate system;
step 5.2: floating the ship A and the ship B in situ according to an actually carried dock three-dimensional coordinate system;
step 5.3: undocking the ship A according to an actually carried dock three-dimensional coordinate system, and keeping the ship B in place;
step 5.4: controlling a ship B by using an actually carried dock three-dimensional coordinate system according to the length, width and height three-dimensional data, directly moving the ship B to a two-stage area, pumping water to the dock, and sitting on the pier after positioning;
step 5.5: and (4) draining the water of the dock, and finishing the carrying of the ship C in the first-stage area by using the actually carried three-dimensional coordinate system of the dock.
The ship needs to be moved from a first-stage area to a second-stage area after the ship is built, the moving data of the ship needs to be accurately controlled in the process, the deviation cannot be too large, the moving process of the ship needs to be monitored in real time by using an actually carried dock three-dimensional coordinate system, the three-dimensional data in the moving process of the ship is controlled, the ship is accurately guided to move, and the ship is ensured to fall on a pier when sitting down on the pier, so that the stress is ensured to be uniform, and a bottom plate of the ship cannot be damaged. In addition, the ship can be positioned while pumping water, the dock three-dimensional coordinate system is favorable for determining the water discharge amount of the dock, and the pier is seated when the water pumping amount is large, so that the dock is not required to be filled with water every time, and the time and the resources are saved. In addition, the secondary ship moving process is simplified into a primary ship moving process, so that primary dock water pumping and water drainage are reduced; the pier is not distributed again once, the pier is not positioned in situ once, the efficiency is improved, the cost is saved, the measurement operation is simple, and the engineering period is short.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. A shipbuilding method capable of being carried quickly is characterized by comprising the following steps:
establishing an actually carried dock three-dimensional coordinate system;
according to a ship theoretical three-dimensional coordinate system formed after a ship is molded in a design stage, theoretical three-dimensional coordinates of the ship X, Y, Z correspond to actual three-dimensional coordinates X, Y, Z of a dock one by one, so that the ship theoretical three-dimensional coordinate system is associated with the actually carried dock three-dimensional coordinate system;
collecting process data of each procedure stage of the segmented construction process, carrying out comparative analysis on the process data, and determining the segmentation allowance adding and discharging amount according to an analysis result;
measuring actual measurement segmented three-dimensional data through a total station, carrying out contrastive analysis on an existing segmentation theory three-dimensional design model and the actual measurement segmented three-dimensional data to obtain a deviation value and a linear deviation value of the actual measurement segmented three-dimensional data, judging the state of the segments according to the shipbuilding quality standard, rectifying and reforming the segments which do not meet the shipbuilding quality standard to obtain first segmented state data;
according to a segmentation theory three-dimensional coordinate system formed by a segmentation theory three-dimensional design model, a segmentation theory X, Y, Z three-dimensional coordinate corresponds to a segmentation actual three-dimensional X, Y, Z coordinate one by one, so that the segmentation theory three-dimensional coordinate system is associated with a segmentation actual measurement three-dimensional coordinate system;
importing the first segmentation state data into a segmentation theoretical three-dimensional coordinate system, carrying out simulation carrying analysis to obtain a deviation value of a closure opening, carrying out allowance cutting and/or structure dislocation rectification on a defective closure opening according to the deviation value, and obtaining second segmentation state data after processing;
and sorting out the three-dimensional carrying positioning data of the key points according to the second section state data, and carrying out actual carrying according to the three-dimensional carrying positioning data.
2. The shipbuilding method capable of being carried quickly according to claim 1, wherein the concrete steps of establishing the actually carried dock three-dimensional coordinate system are as follows:
step 1.1: measuring the central position of the width of a dock by using a total station, measuring a plurality of central mark points on a bow, a midship and a stern of the dock bottom, and connecting the central mark points to draw a center line of a ground sample;
step 1.2: selecting an optional point which is positioned on one side of a ground sample central line and is positioned outside a ship bottom and reaches a dock wall as a first dock bottom mark point, drawing a plurality of dock bottom mark points on the same side according to the vertical distance from the first dock bottom mark point to the ground sample central line, and connecting the dock bottom mark points to draw a half-width line of the dock bottom; the other half-width line of the dock bottom is arranged on the other side of the center line of the ground sample, and the two half-width lines of the dock bottom are symmetrically arranged relative to the center line of the ground sample;
step 1.3: selecting an optional point on the docking edge on one side of the ground sample central line as a first docking edge marking point, drawing a plurality of docking edge marking points on the same side according to the vertical distance from the first docking edge marking point to the ground sample central line, and connecting the docking edge marking points to draw a docking edge half-width line; the other half width line of the dock edge is arranged on the other side of the center line of the ground sample, and the two half width lines of the dock edge are symmetrically arranged relative to the center line of the ground sample;
step 1.4: measuring a first FR0 rib position at the position of the ground sample center line by using a total station according to the length data of the ship, measuring a plurality of FR0 rib positions perpendicular to the ground sample center line at the left side and the right side of the first FR0 rib position, and drawing an FR0 rib position line perpendicular to the ground sample center line by connecting FR0 rib positions; measuring size data of a joint of a ship section and a main section from a first FR0 rib site on a ground sample central line by using a total station, reflecting the size data to a dock bottom half-width line and a dock side half-width line by using the total station, and drawing a joint port line;
step 1.5: according to the ship height data, measuring deflection data of a ship by using a total station, determining a ship height baseline, respectively reflecting the height baseline to a height reference of a dock bottom and a height reference of a dock edge by using the total station, and determining an auxiliary baseline of the dock bottom and an auxiliary height baseline of the dock edge from the height reference.
3. The shipbuilding method capable of being quickly carried according to claim 1, characterized in that the specific steps of performing comparative analysis of process data and determining the segment allowance adding and discharging amount according to the analysis result are as follows:
step 2.1: measuring data before and after the welding process section, and comparing to obtain welding shrinkage data;
step 2.2: measuring data before and after the fire-tuning process section, and comparing to obtain fire-tuning shrinkage data;
step 2.3: measuring data before and after the lifting and consignment process section, and comparing to obtain lifting and consignment change data;
step 2.4: and determining the adding and releasing amount of the segmentation allowance according to the welding shrinkage data, the fire-tuning shrinkage data and the lifting and consignment change data.
4. The shipbuilding method capable of being carried rapidly according to claim 1, characterized in that the specific steps obtained by performing comparative analysis on the existing segmented theoretical three-dimensional design model and the actually measured segmented three-dimensional data are as follows:
step 3.1: deriving a corresponding segmentation theory three-dimensional design model from an existing shipbuilding database;
step 3.2: importing the segmented theoretical three-dimensional design model into precision analysis software DACS and setting segmented three-dimensional data theoretical points;
step 3.3: and importing the actually measured segmented three-dimensional data into a segmented theoretical three-dimensional design model of precision analysis software DACS, and performing precision adjustment analysis to obtain a deviation value and a linear deviation value of the actually measured segmented three-dimensional data.
5. The shipbuilding method capable of being quickly embarked according to claim 1, further comprising the steps of: the shipbuilding database system is built according to the data of the shipbuilding process, and the shipbuilding database system is used for carrying out feedback adjustment on the shipbuilding process, and the method specifically comprises the following steps:
step 4.1: collecting data of a ship building process;
step 4.2: arranging data of the ship building process;
step 4.3: analyzing data of the ship building process;
step 4.4: and feeding back the analysis result to each process section of the ship construction.
6. The shipbuilding method capable of being carried rapidly according to claim 5, characterized in that the specific steps of the step 4.3 are as follows:
analyzing the collected residual data, the collected inverse deformation data, the collected compensation data and the collected flatness data by using an Excel tool to obtain a first result;
utilizing a Tribon to model and analyze the collected modeling stress data to obtain a second result;
carrying out simulation analysis on the segmented data and the total segment data measured by the total station by using DACS software to obtain a third result;
analyzing the collected precision data and the collected process data by utilizing CAD (computer aided design) modeling to obtain a fourth result;
and automatically analyzing the collected precision report data by using a data management and control platform to obtain a fifth result.
7. The shipbuilding method capable of being quickly embarked according to claim 1, further comprising the steps of: and (3) carrying out ship main scale measurement and water gauge marking by adopting a dock three-dimensional coordinate system and a total station.
8. The shipbuilding method capable of being carried quickly according to claim 2, wherein the dock bottom half-width line and the dock side half-width line are provided with a marking member.
9. A ship one-time ship-moving positioning method comprising the shipbuilding method capable of being carried rapidly according to any one of claims 1 to 8, characterized by comprising the following steps:
collecting bottom flatness data of a plurality of ships at each stage during the construction of the dock according to an actually carried dock three-dimensional coordinate system in the process of constructing the ships;
obtaining flatness change rules of the plurality of ships at each stage when the dock is built according to the collected bottom flatness data of the plurality of ships at each stage when the dock is built;
analyzing the secondary ship moving and pier sitting process according to the flatness change rule of each stage when a plurality of ships are built in the dock to obtain a primary ship moving and pier sitting process;
determining inverse deformation data carried in a section area of a dock according to flatness change rules of a plurality of ships in each section when the dock is built;
determining the height inverse deformation data of the docking blocks in the dock two-stage area according to the flatness change rule of each stage when a plurality of ships are built in the dock;
controlling the flatness of the bottom of the ship in the segmented construction process according to the carried inverse deformation data of the first-stage region of the dock and the height inverse deformation data of the docking blocks of the second-stage region of the dock;
and performing primary ship moving positioning pier sitting through the difference analysis condition of the area of the first stage before the ship moving and the area of the second stage after the ship moving.
10. The method for positioning the ship by one ship shift according to claim 9, wherein the concrete steps of positioning the pier by one ship shift are as follows:
step 5.1: collecting length, width and height three-dimensional data in the building process of the ship B according to an actually carried dock three-dimensional coordinate system;
step 5.2: floating the ship A and the ship B in situ according to an actually carried dock three-dimensional coordinate system;
step 5.3: undocking the ship A according to an actually carried dock three-dimensional coordinate system, and keeping the ship B in place;
step 5.4: controlling a ship B by using an actually carried dock three-dimensional coordinate system according to the length, width and height three-dimensional data, directly moving the ship B to a two-stage area, pumping water to the dock, and sitting on the pier after positioning;
step 5.5: and (4) draining the water of the dock, and finishing the carrying of the ship C in the first-stage area by using the actually carried three-dimensional coordinate system of the dock.
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| CN112339930B (en) * | 2020-11-16 | 2022-02-11 | 江南造船(集团)有限责任公司 | Three-dimensional modeling and precision control method for ship stem steel casting |
| CN112697051B (en) * | 2020-12-17 | 2023-03-24 | 中国船舶集团青岛北海造船有限公司 | Floating dock positioning measurement system and measurement method |
| CN112815898B (en) * | 2020-12-31 | 2024-03-15 | 上海外高桥造船海洋工程有限公司 | Method for converting ship three-dimensional data measurement into two-dimensional data measurement based on coordinate system |
| CN112960067B (en) * | 2021-01-29 | 2022-04-12 | 广船国际有限公司 | Ship section stowage method |
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| CN113844611B (en) * | 2021-10-18 | 2022-12-06 | 广州黄船海洋工程有限公司 | Shipbuilding method based on continuous simulation and rapid embarkation of digital dock |
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| CN114379727A (en) * | 2021-12-06 | 2022-04-22 | 沪东中华造船(集团)有限公司 | Semi-ship floating displacement rapid positioning method using total station |
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