CN111310278A - Ship automatic modeling method based on simulation - Google Patents
Ship automatic modeling method based on simulation Download PDFInfo
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- CN111310278A CN111310278A CN202010054711.2A CN202010054711A CN111310278A CN 111310278 A CN111310278 A CN 111310278A CN 202010054711 A CN202010054711 A CN 202010054711A CN 111310278 A CN111310278 A CN 111310278A
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Abstract
The embodiment of the invention relates to a simulation-based ship automatic modeling method, which comprises the following steps: establishing a ship three-dimensional model file based on an automatic modeling system; importing two-dimensional data of the ship according to the ship three-dimensional model file, and establishing or modifying an intermediate model through recognition conversion; generating a corresponding surface model for the intermediate model; and detecting the curved surface quality of the curved surface model, and obtaining a three-dimensional model according to the curved surface model passing the detection. The invention establishes the three-dimensional model file, and then rapidly establishes the system of the ship three-dimensional model by importing the two-dimensional data such as the identified two-dimensional line graph, the standard format type value table and the like.
Description
Technical Field
The invention relates to the technical field of ships, in particular to a ship automatic modeling method based on simulation.
Background
The virtual simulation test platform is used as a virtual test platform special for ship performance, and the automatic modeling technology of the ship body plays an important role in designing, evaluating and optimizing the subsequent ship hydrodynamic performance, so that the method for establishing the automatic modeling technology of the ship body based on the virtual simulation test is very important.
The existing three-dimensional model software curved surface is complex to create and strong in specialty, and data loss or damage easily occurs in the data transmission process between the model software and the simulation software. In a virtual test for simulating the hydrodynamic performance of a ship by Computational Fluid Dynamics (CFD), the repeated utilization rate of a single ship model is low, modeling needs to be repeated after the engineering is replaced, and the whole design test process is tedious and slow.
Based on the above, the prior art has the problem of long and slow design of ship models.
The above drawbacks are expected to be overcome by those skilled in the art.
Disclosure of Invention
Technical problem to be solved
In order to solve the problems in the prior art, the invention provides a simulation-based ship automatic modeling method, which solves the problem that the design of a ship model in the prior art is long and slow.
(II) technical scheme
In order to achieve the purpose, the invention adopts the main technical scheme that:
the invention provides a simulation-based ship automatic modeling method, which comprises the following steps:
establishing a ship three-dimensional model file based on an automatic modeling system;
importing two-dimensional data of the ship according to the ship three-dimensional model file, and establishing or modifying an intermediate model through recognition conversion;
generating a corresponding surface model for the intermediate model;
and detecting the curved surface quality of the curved surface model, and obtaining a three-dimensional model according to the curved surface model passing the detection.
In an exemplary embodiment of the present invention, the two-dimensional data is a profile, and the importing the two-dimensional data into the ship according to the ship three-dimensional model file includes:
dividing the ship three-dimensional model file into a plurality of segments;
identifying a two-dimensional model corresponding to the segments according to the plurality of segments according to the two-dimensional graph in the drawing exchange file DXF format;
and establishing a corresponding two-dimensional segment according to the two-dimensional model.
In an exemplary embodiment of the present invention, the two-dimensional data is a type value table, and the importing the two-dimensional data into the ship according to the ship three-dimensional model file includes:
converting the ship type value table of the Excel table into an XML standard type value table file for simulation;
reordering and grouping the type value tables in the XML standard type value table file;
and establishing a ship wire frame diagram comprising a plurality of segments according to the ship three-dimensional model file.
In an exemplary embodiment of the invention, before the creating or modifying the intermediate model by the recognition transformation, the method further includes:
and preprocessing the plurality of segments or the two-dimensional segment.
In an exemplary embodiment of the present invention, the creating or modifying the intermediate model by recognizing the transformation includes:
identifying the segment attributes, and dividing the segment by numbering and naming according to the segment attributes;
selecting a segment to be identified from the divided segments, and automatically identifying or manually identifying the segment;
judging whether the identified segment needs to be modified or not, and if so, modifying;
judging whether the current segment is identified and finished, if the current segment is not identified and finished, continuing to identify until the identification is finished;
if the identification of the current drawing is finished, continuously judging whether the identification of the current drawing is finished, and if the identification of the current drawing is not finished, continuously identifying the next drawing on the current drawing;
and if the current drawing identification is finished, establishing an intermediate model.
In an exemplary embodiment of the present invention, the generating the corresponding surface model by the intermediate model includes:
obtaining a boundary line according to the intermediate model;
and generating a corresponding curved surface model by using a lofting method according to the boundary line.
In an exemplary embodiment of the invention, the detecting of the surface quality of the surface model includes:
displaying a curvature inspection comb-shaped image according to the selected curved surface on the curved surface model;
displaying curvatures of curved surfaces adjacent to the selected curved surface;
and judging the curved surface quality of the selected curved surface according to the curvature check comb-shaped image and the curvature of the curved surface adjacent to the selected curved surface.
In an exemplary embodiment of the invention, the performing ship model transformation on the detected curved surface model, and obtaining the three-dimensional model according to the detected curved surface model includes:
judging the quality of the curved surface, and if the quality of the curved surface meets the requirement of a model, generating the three-dimensional model of the ship;
and if the quality of the curved surface does not meet the requirements of the model, adjusting and smoothing the curved surface with curvature distortion in the curved surface model.
In an exemplary embodiment of the present invention, after obtaining the three-dimensional model according to the curved surface model passing the detection, the method further includes:
acquiring ship type data of a parent ship;
performing hydrostatic calculation on the model value of each station in the model value table according to the ship model data of the parent ship to obtain ship model parameters of the ship model required in the regression model;
carrying out local transformation or overall transformation on the basis of ship type parameters of a ship type required in the regression model;
carrying out affine transformation on the parent ship to obtain ship type parameters of the stretched ship type;
calculating the section change of the ship type parameter of the stretched ship type to obtain the ship type parameter of the new ship type;
and constructing a model according to the ship model parameters of the new ship model to obtain the new ship model.
In an exemplary embodiment of the invention, the affine transformation of the parent ship to obtain the ship model parameters of the stretched ship model includes:
proportionally stretching the mother ship in three directions of XYZ, and adjusting the draft to obtain a stretched ship shape; and
performing hydrostatic calculation on the stretched ship model to obtain ship model parameters of the stretched ship model;
the step of calculating the section change of the ship model parameter of the stretched ship model to obtain the ship model parameter of the new ship model comprises the following steps:
expanding or contracting the cross section of the ship model according to the ship shape parameters of the stretched ship shape;
compensating and adjusting the change of the displacement after the expansion or contraction operation through the draft to obtain a new ship shape; and
and carrying out hydrostatic calculation on the new ship type to obtain the ship type parameters of the new ship type.
(III) advantageous effects
The invention has the beneficial effects that: according to the simulation-based ship automatic modeling method provided by the embodiment of the invention, the system for quickly building the ship three-dimensional model is built by building the three-dimensional model file and then importing the two-dimensional data such as the identified two-dimensional contour map, the standard format type value table and the like.
Drawings
Fig. 1 is a flowchart of a simulation-based ship automation modeling method according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a simulation-based ship automation modeling system according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of the system of FIG. 2 according to an embodiment of the present invention;
FIG. 4 is a flowchart illustrating the step S120 of FIG. 1 for recognizing the transition according to an embodiment of the present invention;
FIG. 5 is a flowchart of the ship shape transformation after the three-dimensional model is obtained in step S140 of FIG. 1 according to an embodiment of the present invention;
FIG. 6 is a process flow diagram for automated modeling in accordance with the present invention.
Detailed Description
For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.
All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Aiming at the problems in the prior art, the invention provides a simulated ship automatic modeling method, which realizes the automatic modeling of a ship three-dimensional model by establishing a ship profile chart, a profile value table and a bridge between three-dimensional models.
Fig. 1 is a flowchart of a simulation-based ship automation modeling method according to an embodiment of the present invention, as shown in fig. 1, the method includes the following steps:
as shown in fig. 1, in step S110, a ship three-dimensional model file is created based on an automated modeling system;
as shown in fig. 1, in step S120, an intermediate model is created or modified by recognition conversion according to the two-dimensional data imported into the ship from the ship three-dimensional model file;
as shown in fig. 1, in step S130, a corresponding surface model is generated by applying the intermediate model;
as shown in fig. 1, in step S140, the curved surface quality of the curved surface model is detected, and a three-dimensional model is obtained from the curved surface model that has passed the detection.
Based on the method, the three-dimensional model file is established, and then the system of the ship three-dimensional model is quickly established by importing the two-dimensional data such as the identified two-dimensional line graph, the standard format type value table and the like.
In order to implement the method, another embodiment of the present invention further provides a simulation-based ship automated modeling system, which is mainly used for ship automated modeling of a virtual simulation test. Fig. 2 is a schematic diagram of a simulation-based ship automation modeling system according to an embodiment of the present invention, and as shown in fig. 2, the system 200 follows the automation modeling requirements of a ship and divides the ship automation modeling system into: the information storage module 210, the graph analysis module 220, the ship type transformation module 230 and the three-dimensional model module 240, the interface between the modules adopts the ado.
The information storage module 210 mainly includes an imported two-dimensional type chart, a standard type value table file, and a database. The method has the main functions of managing and storing the imported ship two-dimensional contour map and the standard contour table file, storing the two-dimensional contour map and the standard contour table file in the database file, facilitating calling of mother ship data in the ship shape conversion process, realizing functions of data searching, editing, deleting and loading, and realizing data sharing.
The graph analysis module 220 has the main functions of establishing a rule for converting a two-dimensional line graph or a model value table into a three-dimensional model, identifying the two-dimensional line graph and a standard model value table file one by one, modifying, editing and deleting unreasonable line segments, converting the unreasonable line segments into an intermediate model, and optimizing the intermediate model, so that a ship three-dimensional model with good quality is generated. Wherein unreasonable line segments include: line segments that are distracting and not within the recognition range, line segments that are piecewise representative, line segments that have too many data points, and line segments that overlap.
The ship type conversion module 230 has the main functions of calling the profile map or the profile value table data of the parent ship in the database, performing hydrostatic calculation on each station, performing ship type conversion, finally outputting a series of new ship type data, converting the new ship type data into a three-dimensional intermediate model of the ship, modifying and optimizing the new ship type data, and synchronously storing the information in the database.
The three-dimensional model module 240 has a main function of converting the intermediate model generated in the graph analysis module 220 and the ship model conversion module 230 into a permanent model in an igs format, and can perform inspection optimization on the curved surface of the generated model, store the generated permanent model in a database, and ensure correct transmission of model data.
Fig. 3 is a schematic diagram illustrating the operation of the system in fig. 2 according to an embodiment of the present invention, as shown in fig. 3, the graph parsing module 220 performs data extraction on the two-dimensional type chart or type value table received from the information storage module 210, and then identifies a type value table file or type value table file to load into the modeling system. The ship model conversion module 230 mainly extracts data according to the two-dimensional model chart or model value table received from the information storage module 210, and then performs hydrostatic calculation, affine transformation, hydrostatic calculation, profile change, hydrostatic calculation, and then builds an intermediate model. The three-dimensional model module 240 is used to generate a permanent model from the three-dimensional intermediate file and the converted intermediate file of the ship model.
The system is based on programming languages such as C + +, VC and the like and development tools, is oriented to program development and software design, achieves the purpose of correctly and quickly establishing a hull three-dimensional model by identifying and converting a hull contour map and a contour table, and provides support for the evaluation and optimization of the hydrodynamic performance of the ship.
The method is described in detail below with reference to the flow of steps shown in fig. 1 and the systems shown in fig. 2 and 3:
in step S110, a three-dimensional model file of the ship is created based on the automated modeling system.
In one embodiment of the invention, this step is entered into an automated modeling system; and building a ship three-dimensional model file.
In step S120, an intermediate model is created or modified by recognition conversion according to the two-dimensional data of the ship imported from the ship three-dimensional model file.
In the step, when two-dimensional data is imported, the data format needs to be judged, whether the data format is a type line graph or a type value table is judged, and then different formats are identified to draw the three-dimensional model of the ship body.
In an embodiment of the present invention, when the two-dimensional data is a profile, the importing the two-dimensional data of the ship according to the three-dimensional model file of the ship in this step includes:
(2.11) dividing the ship three-dimensional model file into a plurality of segments; different segments refer to different two-dimensional profiles of the lead-in system.
And (2.12) identifying a two-dimensional model corresponding to the segments according to the plurality of segments according to the two-dimensional graph in the drawing exchange file DXF format.
And (2.13) establishing a corresponding two-dimensional segment according to the two-dimensional model.
The profile diagram is composed of three groups of graphs, namely a transverse section diagram, a half-width water line diagram and a longitudinal section diagram, the profile surface of the ship body cannot be completely represented only by the three plane diagrams, and a plurality of sections parallel to three basic projection planes need to be supplemented. After the above steps are completed, the information of the two-dimensional segment is also synchronously stored in the database of the information storage module 210.
In an embodiment of the present invention, when the two-dimensional data is a type value table, the importing the two-dimensional data of the ship according to the three-dimensional model file of the ship in this step includes:
and (2.21) converting the ship type value table of the Excel table into an XML standard type value table file for simulation, wherein the type value table is a set of points on the ship type surface, and the Excel type value table is converted into the XML standard type value table file of the virtual simulation test platform, so that the information is unique, and the information is transmitted more accurately and rapidly.
(2.22) reordering and grouping the type value tables in the XML standard type value table file; and grouping the data in the type value table by grouping, wherein one group corresponds to one station, and one mark in the type value table is a station number and represents ship type data of a plurality of ship cross sections.
(2.23) building a ship wire frame diagram comprising a plurality of segments according to the ship three-dimensional model file.
Similarly, after the above steps are completed, the ship wire frame diagram including a plurality of segments is synchronously stored in the database of the information storage module 210. The model value table and the model chart are different, and the system of the embodiment can identify the model chart to establish the ship model and can also identify the model value table to establish the ship model.
In an embodiment of the present invention, before the step of establishing or modifying the intermediate model by the recognition transformation, the method further includes:
and preprocessing the plurality of segments or the two-dimensional segment.
The preprocessing comprises proportion setting, origin setting, line segment processing and the like.
Fig. 4 is a flowchart illustrating the recognition and conversion in step S120 in fig. 1 according to an embodiment of the present invention, as shown in fig. 4, specifically including the following steps:
in step S401, a segment to be identified is selected, a segment attribute is identified, and the segment is divided into numbers and names according to the segment attribute.
In step S402, a segment to be identified is selected from the divided segments, and is identified automatically or manually.
In step S403, it is determined whether or not the identified segment needs to be modified, and if so, the model is modified.
The model modification in the step mainly refers to modification of unreasonable line segments, and specifically may include: deleting line segments, merging line segments, line segment reduction, deleting repeated line segments and the like.
The line segment deletion is to delete the line segment which is interfered in the identification and is not in the identification range; the line segment combination is to connect the line segments represented by the segments for combination; the line segment is encrypted to reduce data points representing the line segment, so that the processing speed of the line segment is accelerated; the repeated line segment deletion means that a plurality of line segments on the deletion figure are overlapped together, and redundant line segments representing the same line segment are repeated, so that the plurality of line segments overlapped by the same line segment are deleted.
In step S404, it is determined whether the current segment is identified and terminated, and if the current segment is not identified and terminated, the identification is continued until the identification is terminated.
In step S405, if the current drawing identification is finished, it is continuously determined whether the current drawing identification is finished, and if the current drawing identification is not finished, the next drawing is continuously identified on the current drawing.
In step S406, if the current drawing recognition is finished, an intermediate model is established.
It should be noted that after the intermediate model is established, the knowledge in the knowledge base and the database may be called to check the intermediate model, if the intermediate model is correct, the subsequent steps are continued, and if the intermediate model is incorrect, the intermediate model needs to be modified or optimized.
In step S130, a corresponding surface model is generated by applying the intermediate model.
In one embodiment of the present invention, the steps mainly comprise: obtaining a boundary line according to the intermediate model; and generating a corresponding curved surface model by using a lofting method according to the boundary line.
In step S140, the curved surface quality of the curved surface model is detected, and a three-dimensional model is obtained according to the curved surface model that has passed the detection.
In an embodiment of the present invention, the optimizing the curved surface model obtained in the foregoing steps, and detecting the curved surface quality of the curved surface model before the optimizing specifically includes: firstly, a comb-shaped image is checked according to the curvature displayed on the selected curved surface of the curved surface model, so that a user can visually see the change of the curvature of the model, and the accuracy of the model is improved; then, the curvature of the curved surface adjacent to the selected curved surface is displayed, so that a user can conveniently check and judge the transition condition of the curved surface; and finally, according to the curvature checking comb-shaped image, judging the curved surface quality of the selected curved surface by combining the curvature of the curved surface adjacent to the selected curved surface.
In an exemplary embodiment of the present invention, the performing ship model transformation on the detected curved surface model, and obtaining the three-dimensional model from the detected curved surface model includes:
judging the quality of the curved surface, and if the quality of the curved surface meets the requirement of a model, generating the three-dimensional model of the ship;
and if the curved surface quality does not meet the model requirement, adjusting and smoothing the curved surface with curvature distortion in the curved surface model, namely performing curved surface optimization until the optimized curved surface quality meets the model requirement.
In an exemplary embodiment of the invention, after the above optimization is completed in this step, the permanent model is converted into an igs format model: and after confirming that the three-dimensional model of the ship body has no problem, converting the three-dimensional model of the ship body into an igs format model, and entering the next module of the virtual simulation test platform.
In order to simplify the ship design optimization process, the ship type is transformed by combining the mother ship to obtain a large amount of ship type data, and the virtual test comparison is convenient to carry out. Fig. 5 is a flowchart illustrating the ship shape transformation performed after the three-dimensional model is obtained in step S140 of fig. 1 according to an embodiment of the present invention, as shown in fig. 5, the method specifically includes the following steps:
in step S501, ship type data of the parent ship is obtained, where the parent ship type data database mainly includes ship type data designed and stored autonomously and different ship type data provided by the system, so as to facilitate direct calling of the parent ship and data of various ship types from the database in subsequent steps.
In step S502, according to the model data of the parent ship, performing hydrostatic calculation on the model value of each station in the model value table to obtain the model parameter of the ship model required in the regression model.
In step S503, the ship model conversion method is selected. The system can select different ship type transformation modes for local transformation or overall transformation according to requirements, and the local transformation mainly refers to the local transformation which can be selected when the local performance of the ship is not satisfied and only local optimization is carried out; the overall transformation mainly refers to the change of the whole ship shape, and the change range is large.
And step S504, local transformation or overall transformation is carried out on the basis of the ship type parameters of the ship type required in the regression model. The step can be performed by controlling the water discharge amount (
) The transformation of the female type ship is realized by parameters such as ship length (L), ship width (B), draft (T), midship section Coefficient (CM) and the like, wherein the displacement volume and the draft are compensation variables mutually, one of the compensation variables is selected as an independent variable, and the other compensation variable is selected as a dependent variable and is changed along with the change of other parameters.
In step S505, affine transformation is performed on the parent ship to obtain ship shape parameters of the stretched ship shape. For example, the mother ship can be proportionally stretched in three directions of XYZ, and the draft is adjusted to obtain a stretched ship shape; and performing hydrostatic calculation on the stretched ship type to obtain the ship type parameters of the stretched ship type.
Affine transformation is used for transformation of the ship shape in the step, transformation in the mode can achieve transformation of the mother ship within a large scale range, and meanwhile characteristics of the mother ship on the line shape can be well inherited, so that the superiority of the newly generated ship shape is guaranteed.
In step S506, the profile change calculation is performed on the ship model parameter of the stretched ship model to obtain a ship model parameter of a new ship model. For example, the cross section of the ship model is expanded or contracted according to the ship model parameters of the stretched ship model by calculating control section parameters (such as midship section coefficients); compensating and adjusting the change of the displacement after the expansion or contraction operation through the draft to obtain a new ship shape; and carrying out hydrostatic calculation on the new ship type to obtain the ship type parameters of the new ship type.
In step S507, a model is constructed according to the ship model parameters of the new ship model to obtain a new ship model, that is, a three-dimensional model of more ship models is obtained through ship model conversion. And the obtained new ship model is automatically stored in a database, so that the model can be called at any time in the follow-up process.
The generated ship model parameters of the new ship model are parameters required for establishing the new ship model, and a model value table file and a two-dimensional model chart of the new ship model are generated according to the parameters, wherein the model value table is a model value table of the new ship model automatically generated after the new ship model is obtained. The type value table is obtained mainly for the convenience of next modeling, and the type value table can be loaded for automatic modeling.
Based on the above steps, fig. 6 is a flowchart of the process of performing automated modeling according to the present invention.
In summary, the simulation-based ship automatic modeling method provided by the embodiment of the invention is suitable for the ship model automatic generation technology in the processes of evaluation, design and development of ships, the model value table and the model chart both belong to indispensable elements in the process of ship design and development, a numerical value and a bridge between two dimensions and three dimensions are established, the utilization rate of a ship model is improved, the modeling time is saved, and the flexibility is higher. By combining the ship type optimization, different ship types can be changed according to the ship type of the mother ship, and the ship type optimization process is simplified. The information is unique by converting the type value table into the XML standard type value table file, and after the curved surface model is obtained more accurately and rapidly through information transmission, the ship-shaped curved surface quality can be optimized, the curved surface comb-shaped graph can be checked, a user can visually see the change of the curvature of the model conveniently, and the accuracy of the model is improved. The affine transformation is used for transforming the ship shape, so that the transformation of the mother ship in a larger scale range can be realized, and the characteristics on the line shape of the mother ship can be well inherited, thereby ensuring the superiority of the newly generated ship shape.
It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the invention. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.
Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiment of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which can be a personal computer, a server, a touch terminal, or a network device, etc.) to execute the method according to the embodiment of the present invention.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. A ship automatic modeling method based on simulation is characterized by comprising the following steps:
establishing a ship three-dimensional model file based on an automatic modeling system;
importing two-dimensional data of the ship according to the ship three-dimensional model file, and establishing or modifying an intermediate model through recognition conversion;
generating a corresponding surface model for the intermediate model;
and detecting the curved surface quality of the curved surface model, and obtaining a three-dimensional model according to the curved surface model passing the detection.
2. The simulation-based ship automation modeling method of claim 1, wherein the two-dimensional data is a profile graph, and the importing the two-dimensional data of the ship according to the ship three-dimensional model file comprises:
dividing the ship three-dimensional model file into a plurality of segments;
identifying a two-dimensional model corresponding to the segments according to the plurality of segments according to the two-dimensional graph in the drawing exchange file DXF format;
and establishing a corresponding two-dimensional segment according to the two-dimensional model.
3. The simulation-based ship automation modeling method of claim 1, wherein the two-dimensional data is a type value table, and the importing the two-dimensional data of the ship according to the ship three-dimensional model file comprises:
converting the ship type value table of the Excel table into an XML standard type value table file for simulation;
reordering and grouping the type value tables in the XML standard type value table file;
and establishing a ship wire frame diagram comprising a plurality of segments according to the ship three-dimensional model file.
4. The simulation-based automated ship modeling method according to claim 2 or 3, wherein before the creating or modifying the intermediate model by the recognition transformation, further comprising:
and preprocessing the plurality of segments or the two-dimensional segment.
5. The simulation-based vessel automation modeling method of claim 4, wherein the building or modifying the intermediate model by identifying transitions comprises:
identifying the segment attributes, and dividing the segment by numbering and naming according to the segment attributes;
selecting a segment to be identified from the divided segments, and automatically identifying or manually identifying the segment;
judging whether the identified segment needs to be modified or not, and if so, modifying;
judging whether the current segment is identified and finished, if the current segment is not identified and finished, continuing to identify until the identification is finished;
if the identification of the current drawing is finished, continuously judging whether the identification of the current drawing is finished, and if the identification of the current drawing is not finished, continuously identifying the next drawing on the current drawing;
and if the current drawing identification is finished, establishing an intermediate model.
6. The simulation-based automated modeling method for a ship according to claim 1, wherein said generating a corresponding surface model by said intermediate model comprises:
obtaining a boundary line according to the intermediate model;
and generating a corresponding curved surface model by using a lofting method according to the boundary line.
7. The simulation-based automated modeling method for a ship according to claim 1, wherein said detecting the surface quality of said surface model comprises:
displaying a curvature inspection comb-shaped image according to the selected curved surface on the curved surface model;
displaying curvatures of curved surfaces adjacent to the selected curved surface;
and judging the curved surface quality of the selected curved surface according to the curvature check comb-shaped image and the curvature of the curved surface adjacent to the selected curved surface.
8. The method of claim 1, wherein the performing a ship model transformation on the detected surface model and obtaining a three-dimensional model from the detected surface model comprises:
judging the quality of the curved surface, and if the quality of the curved surface meets the requirement of a model, generating the three-dimensional model of the ship;
and if the quality of the curved surface does not meet the requirements of the model, adjusting and smoothing the curved surface with curvature distortion in the curved surface model.
9. The method according to claim 8, further comprising, after obtaining the three-dimensional model from the detected curved surface model:
acquiring ship type data of a parent ship;
performing hydrostatic calculation on the model value of each station in the model value table according to the ship model data of the parent ship to obtain ship model parameters of the ship model required in the regression model;
carrying out local transformation or overall transformation on the basis of ship type parameters of a ship type required in the regression model;
carrying out affine transformation on the parent ship to obtain ship type parameters of the stretched ship type;
calculating the section change of the ship type parameter of the stretched ship type to obtain the ship type parameter of the new ship type;
and constructing a model according to the ship model parameters of the new ship model to obtain the new ship model.
10. The method according to claim 9, wherein the affine transformation is performed on the parent ship to obtain the ship model parameters of the stretched ship model, and the method comprises the following steps:
proportionally stretching the mother ship in three directions of XYZ, and adjusting the draft to obtain a stretched ship shape; and
performing hydrostatic calculation on the stretched ship model to obtain ship model parameters of the stretched ship model;
the step of calculating the section change of the ship model parameter of the stretched ship model to obtain the ship model parameter of the new ship model comprises the following steps:
expanding or contracting the cross section of the ship model according to the ship shape parameters of the stretched ship shape;
compensating and adjusting the change of the displacement after the expansion or contraction operation through the draft to obtain a new ship shape; and
and carrying out hydrostatic calculation on the new ship type to obtain the ship type parameters of the new ship type.
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| CN111968226A (en) * | 2020-08-18 | 2020-11-20 | 江南造船(集团)有限责任公司 | Ship pipe processing jacking marking calculation method, system and terminal |
| CN112149229A (en) * | 2020-09-25 | 2020-12-29 | 中国船舶工业集团公司第七0八研究所 | Model integration method in ship design |
| CN112364441A (en) * | 2020-12-02 | 2021-02-12 | 江南造船(集团)有限责任公司 | Model-driven ship simulation method, system, medium and equipment |
| CN112579598A (en) * | 2020-12-15 | 2021-03-30 | 北京动力机械研究所 | Test data identification method and device |
| CN112815898A (en) * | 2020-12-31 | 2021-05-18 | 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 |
| CN113569334A (en) * | 2021-06-28 | 2021-10-29 | 上海外高桥造船有限公司 | Ship model reverse modeling system based on AutoCAD |
| CN113955035A (en) * | 2021-10-20 | 2022-01-21 | 舟山中远海运重工有限公司 | Ship profile design method |
| CN114004014A (en) * | 2021-10-19 | 2022-02-01 | 中船重工奥蓝托无锡软件技术有限公司 | Hull curved surface automatic modeling system based on NURBS |
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