CN110210120B - Automatic modeling method for railway engineering based on parameterization - Google Patents
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Abstract
A railway engineering automatic modeling method based on parameterization belongs to the technical field of modeling of constructional engineering. The method comprises the steps of acquiring environment information data and dimension model data, summarizing the environment information data and the dimension model data, importing the environment information data and the dimension model data into a cloud platform, compiling a revit identifiable file by using a C language program according to the platform data, automatically reading and generating a BIM model by using the revit, and performing collision checking by using visworks software to correct the model, thereby overcoming the defects that the traditional modeling period is long, the cost is high, the space attribute is not possessed, the sharing performance is poor, huge data cannot be smoothly operated on common equipment, and the method is not suitable for large-batch rapid modeling engineering. The purpose of one-key rapid batch modeling is achieved.
Description
Technical Field
The invention mainly relates to a parameterized railway automatic modeling method, belonging to the technical field of modeling of constructional engineering.
Background
The railway engineering projects are linearly distributed, and have the characteristics of cross-territory, huge engineering quantity, complex construction and the like, and the traditional two-dimensional method cannot accurately describe objective world and provides visual display for users, so that the three-dimensional technology attracts wide attention. The traditional three-dimensional modeling method mainly adopts manual construction of a fine three-dimensional model, has the advantages of good display effect, long modeling period, high cost, no spatial attribute, poor sharing, incapability of smoothly running huge data on common equipment and inapplicability to large-batch rapid modeling engineering. Therefore, a rapid, batch, accurate and rational modeling method is needed to construct a three-dimensional scene, and parameterized three-dimensional modeling technology is becoming a research hotspot. The basic idea of the parameterized three-dimensional modeling technology is to define various geometric characteristics of a model by parameters, and adjust related parameters through a certain formula and a mathematical rule in a mutual correlation manner, so that the three-dimensional model is built in batches and quickly.
Disclosure of Invention
The invention aims to provide a rapid, batch, accurate and rational automatic modeling of railway engineering with a three-dimensional scene.
In order to achieve the above purpose, the invention adopts the following technical scheme that the method is based on parameterized railway engineering automation modeling, environmental information data is obtained, three-dimensional model data is established, the environmental information data is summarized in EXCEL, a cloud platform is imported, a revit identifiable file is written by using a C language program according to the platform data, then a BIM model is automatically read and generated by using the revit, and then collision inspection can be performed by using visworks software to correct the model.
The components such as a girder body, a pier body, a bearing platform, a pile foundation and the like of the railway bridge are regularly and repeatedly arranged according to a certain geographic space, and the component parameters can define various geometric characteristics. Therefore, a three-dimensional scene can be established by selecting a parameter driving model, and the required parameters are extracted to an Excel table and uploaded. And automatically generating a model of the whole path by one table. The parameterized modeling is used for inducing the geometric characteristics of the change from the similar models, describing the geometric characteristics as controllable mathematical parameters, and further obtaining different geometric models by setting different parameters. Complex engineering building models generally adopt a combination modeling mode, the whole model is decomposed into a series of components according to the building rules which the model follows, the complex components can be continuously decomposed into simpler components (forming a hierarchical detail model), and the arrangement and the splicing of the components are described by using combination parameters. The model is simple, and the shape of the model can be obtained only by calculating parameters.
Further, the invention carries out BIM model making in an Autodesk Revit, and specifically comprises the following steps:
(1) According to exploration and design data, extracting three-dimensional coordinates corresponding to railway engineering characteristic values and all parameter information required by BIM modeling, including height, width, structural layer information, positioning, constructing information required by railway engineering along the line by using materials and the like, and storing the information in chart processing software EXCe 1;
(2) Programming in a visual studio by using a C language according to Revit grammar rules, reading data reflecting railway engineering characteristic values in the EXCel, starting the Revit according to the program, and connecting data points end to generate a railway center line model in the Revit;
(3) According to design data, determining three-dimensional coordinates of a railway cross section control point at the position along a railway center line model at intervals, writing each cross section control point by using a C language, and generating a railway engineering structure model at the position of the cross section control point on the basis;
(4) And (3) selecting a corresponding railway center line and a railway cross section, and continuing programming in a visual studio by using a C language to execute a lofting fusion command to generate a complete railway structure model.
(5) On the basis of the railway structure model in the step (4), controlling a cross section center point and a corresponding cross section shape according to exploration and design data by combining with railway engineering characteristic values, and programming by using a C language to generate a railway engineering structure;
(6) And (3) confirming that the railway engineering is accurate, namely that the upper structure and the lower structure are accurate, then merging the language programs of the steps (2) - (5), running and debugging the programs, and generating a complete Revit railway model.
In the step (1), the whole model of the railway engineering to be built is decomposed into standard components such as piles, bearing platforms, piers and beams, and parameters of some characteristics are extracted, wherein the parameters comprise the geometric structure and the positioning of each pile or each pier (the positioning adopts coordinate positioning and is simultaneously combined with the actual geographic position), the material characteristics and the like, and then the parameters are input into a whole Excel table and uploaded, so that a simplified central line model of the whole road is automatically generated by one table. Or for convenience, the upper structure and the lower structure of the railway surface are respectively formed into one table, namely, two tables are formed in total, and the two tables are respectively formed.
For complex engineering building models, a combined modeling mode is generally adopted, the whole model is decomposed into a series of components according to building standards which the model follows, the complex components can be continuously decomposed into simpler components to form a hierarchical detail model, and the arrangement, the splicing and the like of the complex components are described by using combined parameters. For a simple model, the shape of the model can be obtained by calculating parameters.
In order to improve the accuracy of model reproduction in the automatic modeling process of railway engineering, but collision phenomena among various structures are still unavoidable, in order to correctly restore the model, the invention also utilizes Autodesk Navisworks software to carry out collision check, and the model is corrected through a collision check report result. The model in Revit is imported into Navisworks software in a nwc format for further checking and coordination, the model architecture is perfected, and the accuracy of the model is further improved.
After the obtained model is imported to a platform of a related department, the method and the system rapidly read component statistics data of the model and write construction information data, and simultaneously establish an engineering information database, so that later-stage call and check are convenient at any time. The railway engineering automation modeling platform can be used for identifying, processing, analyzing and three-dimensional visual expression of the terrain information based on the data source provided by the aerial survey or network geographic information service. And processing the acquired elevation data and the image data in the BIM to obtain a virtual terrain environment model, and then carrying out matching superposition on the poor geological area and the virtual terrain environment which are remotely sensed and interpreted, so that a true three-dimensional visual geological model can be established in the railway digital line selection system.
Drawings
FIG. 1 is a section of an Excel table section of the superstructure data;
fig. 2 is a section of a lower structure data Excel table section.
Detailed Description
The following examples are provided to further illustrate the invention without limiting the invention thereto.
Example 1
The automatic modeling method of the railway engineering based on parameterization comprises the following steps:
first, extracting required characteristic values and creating BIM parameterized model
The automatic modeling of railway engineering takes CAD data as a data basis, BIM model making is carried out in an Autodesk Revit, one of the core characteristics of BIM modeling is model parameterization design, the whole model is that firstly, the railway engineering is divided into components and subclasses, the smallest component of the modeling is formed, the geometric, positioning and material characteristics of the component are described by adopting a parameterization method, and the component examples with different forms are obtained by inputting parameter values. I.e. the whole model of the railway engineering is broken down into standard components such as piles, piers, beams. And extracting parameters of some characteristics, wherein the parameters of the upper structure data comprise bridge names, pier numbers, positioning pier numbers, starting pier numbers, ending pier numbers, starting mileage, ending mileage, beam body types, crossing entities, calculated spans, hole span types, hole span sizes, beam bodies (special hole span structures), girder erection periods (lists), transportation distances, girder erection time average calculation (days), hole span numbers, girder erection periods (each girder), supply girder fields, and the parameters of the lower structure data comprise bridge pier numbers, pile numbers, x coordinates, y coordinates, relative x positions, bridge pier types, bridge top forward length, bridge top transverse length, bridge height, bridge top forward length, bridge top transverse length, bridge top thickness, pile foundation types, pile length, platform bottom elevation and platform top elevation, and then the parameters are input into an integral Excel table (according to a required format, such as the same information is in a row, and the like), and uploading the parameters are finally formed into a model for automatically generating the whole road by one table. After the Revit is imported, the invention can rapidly read the component statistics data of the model and write the construction information data, and simultaneously establishes an engineering information database, so that the engineering information database is convenient to call and check at any time in the later period, namely, the geometric characteristics of the changes are induced from the similar model, the geometric characteristics are described as controllable mathematical parameters, and further, different geometric models are obtained by setting different parameters. Complex engineering building models generally adopt a combination modeling mode, the whole model is decomposed into a series of components according to the building standard which the model follows, the complex components can be continuously decomposed into simpler components (forming a hierarchical detail model), and the arrangement and the splicing of the components are described by using combination parameters. The model is simple, and the shape of the model can be obtained only by calculating parameters. By utilizing the digital design result of railway engineering and developing the BIM model design plug-in, the high-efficiency and rapid construction of the railway station information model can be realized. The detailed measures are as follows:
(1) And extracting three-dimensional coordinates corresponding to the railway engineering characteristic values and all parameter information required by BIM modeling, including height, width, structural layer information, positioning, constructing information required by railway engineering along the line by using materials and the like, and storing the information in chart processing software EXCe1 according to exploration and design data.
(2) Programming in a C language in a visual studio according to Revit grammar rules, reading data reflecting railway engineering characteristic values in the EXCel, starting the Revit according to the program, and connecting data points end to generate a railway center line model in the Revit.
(3) According to design data, determining three-dimensional coordinates of the railway cross section control points at the positions along the railway center line model at certain intervals, writing the cross section control points by using a C language, and generating a railway engineering structure model at the positions of the cross section control points on the basis.
(4) And (3) selecting a corresponding railway center line and a railway cross section, and continuing programming in a visual studio by using a C language to execute a lofting fusion command to generate a complete railway structure model.
(5) And (3) on the basis of the railway structure model in the step (4), controlling the cross section center point and the corresponding cross section shape according to exploration and design data by combining the railway engineering characteristic values, and programming by using a C language to generate the railway engineering structure.
(6) And (3) confirming that the railway engineering is accurate, namely that the upper structure and the lower structure are accurate, then merging the 2-5C language programs, running and debugging the programs, and generating a complete Revit railway model.
(II) inspection and check model
The automated modeling process of railway engineering improves the accuracy of model reproduction, but collision phenomena between various structures are still unavoidable, and for the purpose of correct restoration of the model, the research herein utilizes Autodesk Navisworks software for collision check, and the model is corrected through collision check report results. At present, a widely used method is to import a model in Revit into Navisworks software in a nwc format for further examination and coordination, improve model architecture and further improve model accuracy.
The foregoing has outlined in detail the basic principles of the present invention with major advantages and benefits. It will be appreciated by persons skilled in the art that the present invention is not limited to the details of the foregoing description of the preferred embodiment, but is capable of numerous variations and modifications without departing from the spirit and essential characteristics of the invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. The automatic modeling method for the railway engineering based on parameterization is characterized by comprising the steps of obtaining environment information data, establishing three-dimensional model data, summarizing the environment information data and the three-dimensional model data, importing the environment information data into an EXCEL, importing the environment information data into a cloud platform, compiling a revit identifiable file by using a C language program according to the platform data, automatically reading and generating a BIM model by using the revit, and performing collision inspection by using visworks software to correct the model;
BIM model making is carried out in an Autodesk Revit, and the method specifically comprises the following steps:
(1) According to exploration and design data, extracting three-dimensional coordinates corresponding to railway engineering characteristic values and all parameter information required by BIM modeling, including height, width and structural layer information, positioning, constructing information required by railway engineering along the line by using materials, and storing the information in chart processing software EXCEL;
(2) Programming in a visual studio by using a C language according to Revit grammar rules, reading data reflecting railway engineering characteristic values in the EXCEL, starting the Revit according to the program, and connecting data points end to generate a railway center line model in the Revit;
(3) According to design data, determining three-dimensional coordinates of a railway cross section control point at the position along a railway center line model at intervals, writing each cross section control point by using a C language, and generating a railway engineering structure model at the position of the cross section control point on the basis;
(4) The method comprises the steps of selecting a corresponding railway center line and a railway cross section, and continuing programming in a visual studio by using a C language to execute a lofting fusion command to generate a complete railway structure model;
(5) On the basis of the railway structure model in the step (4), controlling a cross section center point and a corresponding cross section shape according to exploration and design data by combining with railway engineering characteristic values, and programming by using a C language to generate a railway engineering structure;
(6) Confirming that the railway engineering is accurate, namely that the upper structure and the lower structure are accurate, then merging the language programs of the steps (2) - (5), running and debugging the programs, and generating a complete Revit railway model;
decomposing the whole model of the railway engineering to be built into standard components, piles, bearing platforms, piers and beams, extracting parameters of some characteristics, including geometric structures and positioning material characteristics of each pile or each pier, inputting the parameters into a whole Excel form, uploading the Excel form, and finally forming a simplified central line model for automatically generating the whole road by one form; the positioning adopts coordinate positioning and is combined with the actual geographic position at the same time;
for a complex engineering building model, a combination modeling mode is adopted, the whole model is decomposed into a series of components according to the building standard which is followed by the model, the complex components can be continuously decomposed into simpler components to form a hierarchical detail model, and the arrangement and the splicing of the model are described by using combination parameters;
and extracting the required parameters to the EXCEL form and uploading the extracted parameters, namely, generating one form for each of the upper structure and the lower structure of the railway surface, namely, generating two forms in total, and respectively carrying out the steps.
2. The automated modeling method of railway engineering based on parameterization according to claim 1, wherein the girder body, pier body, bearing platform and pile foundation of the railway bridge are regularly and repeatedly arranged according to a certain geographic space, component parameters are defined into various geometric characteristics, a three-dimensional scene is established by selecting a parameter driving model, and required parameters are extracted into an Excel form and uploaded; and automatically generating a model of the whole path by one table.
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