CN106874610A - A kind of sloping core earth and rockfill dam modeling method based on VB and CATIA - Google Patents

Abstract

The invention discloses a kind of earth and rockfill dam informationization modeling method based on VB and CATIA, secondary development is carried out to CATIA based on VB language, call CATIA to be modeled by VB, comprised the following steps：Three-dimensional terrain model is set up based on existing topographic and geologic data；Association VB and CATIA；VB interface of the design comprising position control parameter and shape parameters in VB；Code is write in VB, the axis of dam is created according to axis of dam extreme coordinates；Code is write in VB, design of dam body is completed；Operation program, |input paramete, generation model.The manifestation mode of traditional design mode is abstract, and error correcting capability is low, strongly limit the lifting of design efficiency.This information-based modeling method based on VB and CATIA, make use of secondary development, parametrization and the three-dimensional visualization characteristic of software, can avoid the shortcoming of traditional water conservancy engineering design pattern, improve efficiency.

Description

A Modeling Method of Inclined Wall Earth-rock Dam Based on VB and CATIA

technical field

The invention relates to the technical field of computer-aided design of water conservancy projects, in particular to a modeling method for earth-rock dams with oblique core walls based on VB (Visual Basic) and CATIA.

Background technique

After the world's first computer came out, computer technology developed at an astonishing speed. Computer-aided design (CAD) technology has been deeply applied to related fields, and traditional drawing with rulers and compasses has basically withdrawn from the stage of history. Today, with the maturity of computer technology, two-dimensional CAD technology has also been widely used in water conservancy industry engineering. The current design pattern is highly mature, has complete drawing specifications, and each object does not contain model information, and there is no logical relationship between objects, so the design method is simple, but its intuition and error correction ability are poor, and editing and modification are complicated and cumbersome.

With the development of digitalization, 3D-based CAD technology has begun to be applied, and the advantages of 3D design such as integration, intelligence, visualization, networking, and parallelization have been displayed, which is an inevitable trend of technological progress. At present, there are many popular 3D design software at home and abroad, and CATIA is a relatively influential one in the market. CATIA is a BIM (Building Information Modeling) software integrating CAD/CAE/CAM developed by Dassault, France. It has powerful solid modeling and surface modeling functions, and can realize the establishment of all objects through parametric modeling. with modification. The software is currently being widely used in aerospace, automobile manufacturing, shipbuilding, machinery manufacturing and many other industries and fields. Due to the lack of universally applicable unified norms and the uniqueness and complexity of water conservancy projects, the application of 3D design methods is still in a relatively backward state, and the application of CATIA in the water conservancy industry has not yet been popularized.

The geological conditions at the dam site of hydraulic projects are complex and difficult to investigate clearly. The design scheme in the preliminary design stage may not be the best scheme. During the construction process, as the construction progresses and the geological conditions become clearer, potential weak interlayers or low-strength rock foundations will be exposed. Therefore, due to the uncertainty of the site conditions, parameters such as the structural form and size of the building and the position of the dam axis have the possibility of adjustment. Due to the complexity of water conservancy projects, local contradictions among various structures also occur from time to time during the construction process. These problems will generate a large amount of engineering in the traditional two-dimensional design mode, which is not conducive to improving design efficiency. Therefore, the traditional design pattern has an abstract expression method and low error correction ability, which greatly limits the improvement of design efficiency.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a VB and CATIA-based modeling method for oblique core wall earth-rock dams, based on the VB and CATIA information modeling method, utilizing the secondary development of software , parametric and 3D visualization features, improve the design efficiency of water conservancy projects.

The present invention adopts the following technical solutions for solving the problems of the technologies described above:

A kind of earth-rock dam information modeling method based on VB and CATIA proposed according to the present invention comprises the following steps:

Step 1. Establishing a three-dimensional terrain model based on existing topographic and geological data;

Step 2, associating VB and CATIA, used to realize the parameter docking of VB and CATIA, to ensure that VB can recognize the keywords of CATIA and the code in VB can be executed in CATIA;

Step 3, design the VB interface that comprises position control parameter and shape control parameter in VB, position control parameter and shape control parameter will be input by the text box of VB interface; Described position control parameter is the dam axis end point coordinate;

Step 4. Write the code to create the dam axis according to the coordinates of the end points of the dam axis;

Step 5. In VB, based on the dam axis established in Step 4, realize the sketch editing and entity stretching of the dam body section, and realize the Boolean command based on the 3D terrain model established in Step 1, and refer to the parameters in the text box of the VB interface , to complete the modeling of the dam body.

As a further optimization scheme of an earth-rock dam information modeling method based on VB and CATIA described in the present invention, the step one is specifically as follows: extract the coordinate points of the contour line according to the existing topographic map, and then convert all the coordinate points Import CATIA and fit it into a surface, and use the surface as a limit to generate a 3D terrain model.

As a further optimization scheme of an earth-rock dam information modeling method based on VB and CATIA according to the present invention, the step four is specifically as follows: according to the coordinates of the dam axis end points in the step three, in the VB code writing window, pass the Set command Get the 3D terrain model in CATIA, create the corresponding point of the coordinates of the end point of the dam axis through the AddNewPointCoord command, and create the dam axis through the AddNewLinePtPt command.

As a further optimization scheme of an earth-rock dam information modeling method based on VB and CATIA according to the present invention, the step five is specifically as follows: Obtain the three-dimensional terrain model and dam axis in CATIA through the Set command, and create based on the dam axis A plane perpendicular to the axis of the dam. Use the Set reference command to obtain the plane and use it as a reference plane. Use the CreatePoint command and CreateLine command to draw a 2D sketch of each part of the dam body on the reference plane. Use the constraint command to use step 3 The shape control parameters of the two-dimensional sketch are constrained to the outline size, so that the dimensions of the dam shell, core wall and prism drainage are consistent with the shape control parameters in step 3, and the two-dimensional sketch is stretched to form a solid by pad command , and finally use the Boolean command to subtract the overlapping part of the entity and the 3D terrain model in step 1 to complete the design of the dam.

As a further optimization scheme of an earth-rock dam information modeling method based on VB and CATIA according to the present invention, the shape control parameters include the elevation and width of each dam crest, the elevation and width of the top of the horseway, the upstream and downstream slopes of the dam body, and the center Wall top elevation and upstream and downstream slopes; the top elevation and width of the horseway include the top elevation and width of the drainage prism, and the upstream and downstream slopes of the dam body include the slope of the drainage prism.

Compared with the prior art, the present invention adopts the above technical scheme and has the following technical effects:

(1) The present invention has changed the problem of lack of intuition in traditional two-dimensional modeling. Through the three-dimensional model, the design object is displayed in a more three-dimensional sense; it solves the need for repeated revisions when using two-dimensional CAD technology Problems that lead to a lot of repetitive work; the traditional design pattern has been changed in terms of design concepts and methods, and the design efficiency has been fundamentally improved from the perspective of informatization, making the design results more accurate; the model established by this modeling method has been carried out in a deeper level. Utilization can produce higher efficiency benefits;

(2) The present invention takes the three-dimensional modeling function of CATIA as the core, and presents the design object as an intuitive three-dimensional model, so that the model is clear and intuitive, and it is more convenient for the designer to explain his design concept; based on the CATIA-based out-of-process program call interface, through Secondary development of CATIA with VB language forms an informational modeling method with easy modification of model parameters and automatic model generation, which reduces repetitive work and improves design quality;

(3) The VB and CATIA-based information modeling method for earth-rock dams described in the present invention is not only applicable to earth-rock dams, but also to basic dam types such as gravity dams, arch dams, and buttress dams; meanwhile, based on The model established by the present invention can also be further used for calculation of filling volume, finite element analysis, and generation of two-dimensional engineering drawings; Various dam types, and even various hydraulic structures, the established models are not limited to structural display, but also can be used for in-depth analysis based on the model, which has a good application prospect in the water conservancy industry.

Description of drawings

Fig. 1 is method flowchart of the present invention;

Fig. 2 is the VB interface figure of the present invention;

Fig. 3 is the three-dimensional model figure of dam body of the present invention;

Fig. 4 is an overall model layout diagram of the present invention.

The symbols in the drawings are interpreted as: 1 is the dam axis, 2 is the dam shell, 3 is the core wall, 4 is the drainage prism, and 5 is the three-dimensional terrain model.

detailed description

Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

The protection scope of the present invention is not limited only to the description of this embodiment.

A VB and CATIA-based information modeling method for earth-rock dams, as shown in Figure 1, the specific steps are as follows:

Step 1. Establish a three-dimensional terrain model 5 as shown in FIG. 4 based on the existing topographic and geological data:

Extract the coordinate points of the contour line according to the existing topographic map, then import all the coordinate points into CATIA and fit them into a surface, and use the surface as a limit to generate a 3D terrain model.

Step 2. Associate VB and CATIA:

Reference the relevant CATIA library files in VB as needed, and associate VB and CATIA through codes to realize the parameter connection between VB and CATIA, so as to ensure that VB can recognize CATIA keywords and codes in VB in the subsequent secondary development. Executed in CATIA. The associated code is as follows:

Dim catia As Object

On Error Resume Next

Set catia = GetObject(, "catia. application")

If Err.Number <> 0 Then

Set catia = CreateObject("catia. application")

catia.Visible = True

End If

On Error GoTo 0

Step 3, design the VB interface shown in Figure 2 that includes position control parameters and shape control parameters in VB:

The position control parameters are the coordinates of the endpoints of the dam axis; the shape control parameters include the elevation and width of the dam crest, the elevation and width of the top of the horseway, the upstream and downstream slopes of the dam body, and the top elevation and upstream and downstream slope of the core wall; the top elevation and width of the horseway include the height and width of the drainage prism The top elevation and width, the upstream and downstream slopes of the dam body include the slope of the drainage prism.

The above parameters will be entered through the text box of the VB interface to ensure the variability of the parameters in the secondary development. In addition, set the command control to ensure the integrity of the command call.

Step 4. Write the code to create the dam axis 1 according to the coordinates of the end points of the dam axis:

According to the coordinates of the end point of the dam axis in step 3, in the VB code writing window, use the "Set" command to obtain the existing object in CATIA—the 3D terrain model, and use the "AddNewPointCoord" command to create the corresponding point of the dam axis end coordinates. AddNewLinePtPt" command to create the dam axis, and complete the secondary development process of creating the dam axis. Among them, due to the connection between VB and CATIA, the code in VB can be executed in CATIA. Some key codes are as follows:

'Use Open to open the complete path of the 3D model of the terrain, and then get the Part object

Set partDocument1 = catia.Documents.Open("full file path")

Set part1 = partDocument1. Part

…………

'Create two points with the coordinates of the end point of the dam axis in VB

Set hybridShapePointCoord1 = hybridShapeFactory1.AddNewPointCoord(Val(X1.Text), Val(Y1.Text), Val(Z1.Text))

…………

Set hybridShapePointCoord2 =

hybridShapeFactory1.AddNewPointCoord(Val(X2.Text), Val(Y2.Text), Val(Z2.Text))

…………

'Connect the two points created into a line, that is, the axis of the dam

Set hybridShapeLinePtPt1 = hybridShapeFactory1. AddNewLinePtPt(reference1, reference2)

…………

Step 5. In VB, based on the dam axis established in Step 4, realize the sketch editing and entity stretching of the dam body section, and implement Boolean commands based on the 3D terrain model established in Step 1, and refer to the shape control in the text box of the VB interface parameters, complete the 3D model design of the dam body as shown in Figure 3:

The code of this part is mainly composed of three parts: dam shell 2, core wall 3 and prism drainage 4. The code writing ideas of the three parts are similar. That is, the existing objects in CATIA—the 3D terrain model and the dam axis are obtained through the Set command in VB, and a plane perpendicular to the dam axis is created based on the dam axis, and then the plane is obtained as a reference plane through Set reference in VB, Use the CreatePoint and CreateLine commands to draw the 2D sketches of each part of the dam body on the reference plane, and use the constraint command to use the shape control parameters in step 3 to constrain the outline size of the 2D sketches, so that the dam shell, core wall and prism The size of the drainage is consistent with the shape control parameters in the third step, and then use the pad command to stretch the 2D sketch to form a solid, and finally use the Boolean command to subtract the overlapping part of the solid and the 3D terrain model to complete the design of the dam . Among them, due to the connection between VB and CATIA, the code in VB can be executed in CATIA. Some key codes are as follows:

'Create a work plane perpendicular to the axis of the dam, used to create the sketch

Set reference2 = hybridShapes2.Item("Plane.4")

…………

'Sketch by creating points and lines

Set point2D1 = factory2D1.CreatePoint(-632.476, 2825#)

Set line2D14 = factory2D1.CreateLine(-719.976, 2790#, -632.476, 2825#)

…………

'Use the corresponding text box parameters in the VB interface to constrain the sketch

Set reference15 = part1.CreateReferenceFromObject(point2D10)

Set reference16 = part1.CreateReferenceFromObject(point2D11)

Set reference17 = part1.CreateReferenceFromObject(line2D1)

Set constraint7 = constraints1. AddTriEltCst(catCstTypeDistance, reference15, reference16, reference17)

constraint7.Mode = catCstModeDrivingDimension

Set Length1 = constraint7. Dimension

Length1.Value = m(2) * (h(1) - Val(h_base))

'Extrude using the Boss command

………………

Set shapeFactory1 = part1.ShapeFactory

Set pad1 = shapeFactory1. AddNewPad(sketch1, 235#)

Set limit1 = pad1. SecondLimit

Set length19 = limit1. Dimension

length19. Value = 300#

………………

Therefore, it is necessary to introduce the 3D modeling function of CATIA into hydraulic engineering, which can not only effectively solve the intuitive problem of 2D drawing, but also greatly improve the design efficiency by using its powerful error correction ability. At the same time, based on the characteristics of secondary development of CATIA based on VB, all parameters can be further reflected in the VB interface, which can realize the clear presentation and easy modification of model parameters in parametric modeling.

Generally speaking, the modeling method involved in the present invention is applicable to all foundation dam types in hydraulic engineering. In particular, this patent describes an earth-rock dam with inclined core walls. Earth-rock dam is currently the most widely used and fastest-growing dam type in dam construction projects in the world. It has greater advantages in economy and construction than other dam types. An earth-rock dam with inclined core wall is a kind of earth-rock dam. The construction interference between the inclined wall and the dam shell is smaller than that of the core wall dam, but its seismic resistance and adaptability to uneven settlement are insufficient. In the process of design and dam construction, the amount of filling should be paid attention to. However, in the traditional design mode, the calculation process is complicated and the result is rough. The volume measurement based on the model established in this patent can effectively solve this problem. In addition, the model established based on the present invention can be combined with finite element software to achieve functional complementarity, and the three-dimensional model can also be used to generate two-dimensional engineering drawings, further generating higher design efficiency.

The information modeling method based on VB and CATIA utilizes the secondary development, parameterization and three-dimensional visualization characteristics of the software, which can avoid the shortcomings of the current hydraulic engineering design mode and improve efficiency. Moreover, further analysis and calculation can be performed based on the model established in this patent. Therefore, it is meaningful to introduce this information modeling method into hydraulic engineering.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various equivalent transformations can be carried out to the technical solutions of the present invention. These equivalent transformations All belong to the protection scope of the present invention.

Claims (5)

1. an earth-rock dam information modeling method based on VB and CATIA, is characterized in that, comprises the following steps: Step 1. Establishing a three-dimensional terrain model based on existing topographic and geological data; Step 2, associating VB and CATIA, used to realize the parameter docking of VB and CATIA, to ensure that VB can recognize the keywords of CATIA and the code in VB can be executed in CATIA; Step 3, design the VB interface that comprises position control parameter and shape control parameter in VB, position control parameter and shape control parameter will be input by the text box of VB interface; Described position control parameter is the dam axis end point coordinate; Step 4. Write the code to create the dam axis according to the coordinates of the end points of the dam axis; Step 5. In VB, based on the dam axis established in Step 4, realize the sketch editing and entity stretching of the dam body section, and realize the Boolean command based on the 3D terrain model established in Step 1, and refer to the parameters in the text box of the VB interface , to complete the modeling of the dam body. 2. a kind of earth-rock dam informatization modeling method based on VB and CATIA according to claim 1, is characterized in that, described step one is specifically as follows: extract the coordinate point of contour line according to existing topographic map, then will All coordinate points are imported into CATIA and fitted into a surface, and a 3D terrain model is generated with the surface as a limit. 3. a kind of earth-rock dam information modeling method based on VB and CATIA according to claim 1, is characterized in that, described step 4 is specifically as follows: according to the dam axis endpoint coordinates in step 3, in VB code writing window The three-dimensional terrain model in CATIA is obtained by the Set command, the corresponding point of the coordinates of the end point of the dam axis is created by the AddNewPointCoord command, and the dam axis is created by the AddNewLinePtPt command. 4. a kind of earth-rock dam informatization modeling method based on VB and CATIA according to claim 3, is characterized in that, described step 5 is specifically as follows: obtain three-dimensional terrain model and dam axis in CATIA by Set order, and Create a plane perpendicular to the dam axis based on the dam axis, use the Set reference command to obtain the plane and use it as a reference plane, use the CreatePoint command and CreateLine command to draw a 2D sketch of each part of the dam body on the reference plane, and use the constraint command Use the shape control parameters in step 3 to constrain the outline size of the 2D sketch, so that the dimensions of the dam shell, core wall and prism drainage are consistent with the shape control parameters in step 3, and use the pad command to edit the 2D sketch Stretch to form a solid, and finally use the Boolean command to subtract the overlapping part of the solid and the 3D terrain model in step 1 to complete the design of the dam. 5. A kind of earth-rock dam information modeling method based on VB and CATIA according to claim 1, is characterized in that, described shape control parameter comprises each dam crest elevation and width, horseway top elevation and width, dam body upper The downstream slope, the elevation of the top of the core wall, and the upstream and downstream slope; the elevation and width of the top of the horseway include the top elevation and width of the drainage prism, and the upstream and downstream slopes of the dam include the slope of the drainage prism.