CN108052776A - Based on the flood model of BIM and three-dimensional live model structure and Dynamic Display method - Google Patents
Based on the flood model of BIM and three-dimensional live model structure and Dynamic Display method Download PDFInfo
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Abstract
The invention discloses a kind of based on the flood model of BIM and three-dimensional live model structure and Dynamic Display method, three dimensional design platform, geographical information platform, hydrodynamics Modeling Platform, three-dimensional live Modeling Platform are subjected to Cross Platform Technology fusion, using three-dimensional live model construction high-precision flood model, and carry out three-dimensional dynamic exhibition；1st, the production of three-dimensional live model, DEM, orthography；2nd, the structure of flood risk analysis model and calculating；3rd, the export and conversion of Calculation of Flood result；4th, outdoor scene model, BIM design a model integrated with Calculation of Flood result；5th, the three-dimensional dynamic exhibition of flood result.Three dimensional design platform, geographical information platform, hydrodynamics Modeling Platform, three-dimensional visualization rendering platform etc. are carried out Cross Platform Technology fusion by the present invention, flood model is built on the basis of the outdoor scene model data of unmanned plane oblique photograph production, it is superimposed outdoor scene model and carries out flood three-dimensional dynamic exhibition so that flood model precision greatly improves.
Description
Technical field
The present invention relates to application of the professional Hydrodynamic Model in hydraulic engineering, more particularly, to based on BIM and three-dimensional
Flood model structure and the Dynamic Display method of outdoor scene model.
Background technology
BIM, that is, Building Information Model is both a kind of form of expression of engineering three dimensional design achievement and a kind of design reason
Thought, method, flow and specification.Three-dimensional live model is by unmanned plane oblique photograph technology, calculates and calculates based on a set of empty three
Method, builds the threedimensional model of real world from captured serial picture, and after being superimposed with captured picture texture, finally
Obtain outdoor scene threedimensional model true to nature；It is public that Hydrodynamic Model is generally basede on the professional hydraulic theory such as flow energy equation
Formula is built, for calculating and simulating the movement in river, sea, lake water stream.It is built at present in Hydrodynamic Model especially flood model
Aspect is often based on the topographic map structure of low precision so that the Shortcomings in terms of model accuracy and bandwagon effect can not be given
People is on the spot in person, the impression of real flood simulation and experience.
The content of the invention
It is a kind of based on the flood model of BIM and three-dimensional live model structure and Dynamic Display side present invention aims at providing
Method greatly improves flood model structure precision, flood inundation on tracks evolution displaying high fidelity effect so as to reach.
To achieve the above object, the present invention takes following technical proposals：
It is of the present invention based on the flood model of BIM and three-dimensional live model structure with Dynamic Display method, three dimensional design is put down
Platform, geographical information platform, hydrodynamics Modeling Platform, three-dimensional live Modeling Platform carry out Cross Platform Technology fusion, using three-dimensional
Outdoor scene model construction high-precision flood model, and carry out three-dimensional dynamic exhibition；Step is as follows：
Step 1, three-dimensional live model, DEM（The abbreviation of English Digital Elevation Model；Digital elevation model）, just
The production of projection picture：
Using three-dimensional live Modeling Platform such as ContextCapture, in the ground aerial photograph acquired in unmanned plane oblique photograph
On the basis of measurement control point, production outdoor scene model, orthography and DSM（The contracting of English Digital Surface Model
It writes, digital surface model）Data, due to being three achievements that same set of basic document is produced by same set of flow, therefore it is sat
Absolute altitude journey will exactly match；Software is handled by the professional landform such as ArcGis DSM erases behind Surface structure, thick grass forest belt
To dem data, it is spare to be finally converted into elevation scatterplot；
Step 2, the structure of flood risk analysis model and calculating：
Using the MIKE21 FM module construction two dimension flood models in the hydrodynamics Modeling Platform Mike groupwares, by precision
It is required that subdivision terrain mesh, and the elevation scatterplot that steps for importing 1 makes carries out terrain mesh interpolation, setting is matched with Gridding length
Parameters（Such as calculate time step）And boundary condition, complete structure and the calculating of two-dimentional flood model；
The export and conversion of step 3, Calculation of Flood result：
Each moment Calculation of Flood result is exported and is converted into three-dimensional grid model；
Step 4, outdoor scene model, BIM design a model integrated with Calculation of Flood result：
In the connect versions of Bentley three-dimensional cooperative design platform MicroStation softwares, connect and deposited with .3mx forms
The three-dimensional live model of storage（The three-dimensional live model criteria form of ContextCapture productions）, and need to show with reference to other
Engineering BIM design a model each moment flood result three-dimensional grid model made with step 3 step, realize that outdoor scene model, BIM are set
The assembling of meter model and Calculation of Flood results model integrates；
The three-dimensional dynamic exhibition of step 5, flood result：
Model after described integrate integrally is imported in Bentley rendering platforms LumenRT, to each moment flood three-dimensional grid mould
Type sets its animation effect after assigning the material and transparency of water, i.e., is in chronological sequence sequentially shown and hidden each with certain frame per second
Moment flood three-dimensional grid model, it is final to realize the flood three-dimensional dynamic exhibition based on three-dimensional live model.
In step 3, the method for each moment Calculation of Flood result being exported and being converted into three-dimensional grid model is：
Step 3.1 is converted each moment Calculation of Flood result by the flood Modeling Platform such as MIKE instrument Mike2Shp of itself
For the shp forms that ArcGis is used, so as to obtain a series of shp results figure layer files, in each shp results figure layer file
Comprising identical triangle of vectors Shaping element, each triangle of vectors Shaping element has every waterpower such as water level, depth of water will
Plain attribute field；
Step 3.2 needs to carry out the screening of result moment and result attribute according to front end displaying：In terms of the screening of result moment,
According to displaying fluency screen, from multiple（Such as 10）As a result one is selected in the moment, in result attribute selection
Aspect only filters out water level and depth of water attribute；
Step 3.3, the triangle of vectors Shaping element by each moment result shp figure layer files, in ArcGis, AutoCAD and
In MicroStation softwares, three-dimensional grid model is converted to by same set of flow chart of data processing.
In step 3.3, by the triangle of vectors face element of each moment result shp figure layer files, in ArcGis, AutoCAD and
The data processing method that three-dimensional grid model is converted in MicroStation softwares is：
Step 3.3.1, screening has the element of flood：In ArcGis, using " screening " instrument, from result shp figure layer files
The triangle of vectors Shaping element that depth of water property value is more than 0 is filtered out, that is, the triangle of vectors Shaping element for having flood inundation on tracks；
Step 3.3.2, face element is switched into an element, in ArcGis, using " element turning point " instrument, in vector triangle face
Triangle of vectors Shaping element is switched to an element by element geometric center position, and element succession has triangle of vectors Shaping element
Water level, depth of water attribute；
Step 3.3.3, described element is switched into grid, in ArcGis, using " landform turnstile lattice " instrument in ArcGis, with
The water level attribute field of point element is elevation field, is converted to an element with the resolution ratio that the same triangle centre plane length of side is close
Grid；
Step 3.3.4, water level isopleth is extracted：In ArcGis, using " isopleth " instrument, to meet flood Dynamic Display
The spacing such as 0.1m that precision needs extracts water level isopleth from grid, and the water level isopleth after extraction has Contour
Attribute, representation level value；
Step 3.3.5, Height attribute field is added：It is equivalent to the water level using " addition field " instrument in ArcGis
The attribute field that the element of line increases an entitled Elevation, type is floating type, so as in AutoCAD to line feature
The identification of elevation；
Step 3.3.6, lightweight water level isopleth control point：In ArcGis, using " generalization " instrument, according to displaying precision
It needs, generalization on water level equivalence line feature vertex is carried out by a certain percentage, so that the model being subsequently generated more lightweight；
Step 3.3.7, cad file is saved as：In ArcGis, using exporting to cad tools, by the isopleth after lightweight
Shp figure layers save File As cad file；
Step 3.3.8, three-dimensional grid model is generated：In three dimensional design platform software MicroStation, by the cad file
In the reference of water level contour and be copied into, and using the contour mesh tool in mesh modeling tool set, by water level etc.
High line is generated as three-dimensional grid model.
The invention has the advantages that by three dimensional design platform, geographical information platform, hydrodynamics Modeling Platform, three-dimensional visualization
Rendering platform etc. carries out Cross Platform Technology fusion, so as to fulfill data basis such as the outdoor scene models produced in unmanned plane oblique photograph
Upper structure flood model, and be superimposed outdoor scene model and carry out flood three-dimensional dynamic exhibition so that the precision of flood model structure is significantly
It improves, flood inundation on tracks evolution process high fidelity, gives people a kind of on the spot in person, real flood inundation on tracks experience.
Description of the drawings
Fig. 1 is the method for the present invention FB(flow block).
Specific embodiment
Elaborate below in conjunction with the accompanying drawings to the embodiment of the present invention, the present embodiment using technical solution of the present invention before
It puts and is implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to down
State embodiment.
It is as shown in Figure 1, of the present invention based on the flood model of BIM and three-dimensional live model structure and Dynamic Display side
Three dimensional design platform, geographical information platform, hydrodynamics Modeling Platform, three-dimensional live Modeling Platform are carried out cross-platform skill by method
Art merges, and using three-dimensional live model construction high-precision flood model, and carries out three-dimensional dynamic exhibition；Step is as follows：
The production of step 1, three-dimensional live model, DEM, orthography：Using three-dimensional live Modeling Platform such as
ContextCapture, on the basis of the ground aerial photograph acquired in unmanned plane oblique photograph and measurement control point, production is real
Scape model, orthography and DSM（The abbreviation of English Digital Surface Model, digital surface model）Data, due to being
Three achievements that same set of basic document is produced by same set of flow, therefore its coordinate elevation will exactly match；Pass through ArcGis
Erase Surface structure, thick grasses of DSM obtained into DEM behind forest belt Deng professional landform processing software（English Digital Elevation
The abbreviation of Model, digital elevation model）It is spare to be finally converted into elevation scatterplot for data.
Step 2, the structure of flood risk analysis model and calculating：Using in the hydrodynamics Modeling Platform Mike groupwares
MIKE21 FM module construction two dimension flood models, the elevation scatterplot made by required precision subdivision terrain mesh and steps for importing 1
Terrain mesh interpolation is carried out, is set and the matched parameters of Gridding length（Such as calculate time step）And boundary condition,
Complete structure and the calculating of two-dimentional flood model.
The export and conversion of step 3, Calculation of Flood result：Two-dimentional Calculation of Flood result data by a series of moment result
Composition, each moment result are the Calculation of Flood at the corresponding moment as a result, including all for storing each hydraulic elements knot
The triangle of vectors face element of fruit attribute, the face element that each moment result includes are identical, hydraulic elements result Attribute class
Type is also identical, but is worth different.It is by the method that Calculation of Flood result is exported and converted：
Step 3.1, first, by the flood Modeling Platform such as MIKE instrument Mike2Shp of itself by each moment Calculation of Flood result
The shp forms that ArcGis is used are converted to, so as to obtain a series of shp results figure layer files, in each shp results figure layer file
Comprising identical triangle of vectors Shaping element, each triangle of vectors Shaping element has every hydraulic elements category such as water level, depth of water
Property field.
Step 3.2, then needs to carry out the screening of result moment and result attribute according to front end displaying：At the result moment
In terms of screening, according to displaying fluency screen, such as one is selected from 10 result moment；In result attribute
In terms of screening, water level and depth of water attribute are only filtered out.
It is step 3.3, last, by the triangle of vectors Shaping element of each moment result shp figure layer files, ArcGis,
In AutoCAD and MicroStation softwares, three-dimensional grid model, specific steps are converted to by same set of flow chart of data processing
For：
Step 3.3.1, screening has the element of flood：In ArcGis, using " screening " instrument, from result shp figure layer files
The triangle of vectors Shaping element that depth of water property value is more than 0 is filtered out, that is, the triangle of vectors Shaping element for having flood inundation on tracks；
Step 3.3.2, triangle of vectors Shaping element is switched into an element：In ArcGis, using " element turning point " instrument, swearing
Gore element geometric center position is measured, triangle of vectors Shaping element is switched into an element, element succession has vector three
Water level, the depth of water attribute of angled face element；
Step 3.3.3, an element is switched into grid：It, will with point using " landform turnstile lattice " instrument in ArcGis in ArcGis
The water level attribute field of element is elevation field, and an element is converted to grid with the resolution ratio that the same triangle centre plane length of side is close
Lattice；
Step 3.3.4, water level isopleth is extracted：In ArcGis, using " isopleth " instrument, to meet flood Dynamic Display
The spacing such as 0.1m that precision needs extracts water level isopleth from grid, and the isopleth after extraction will have Contour to belong to
Property, representation level value；
Step 3.3.5, Height attribute field is added：It, will to water level isopleth using " addition field " instrument in ArcGis
The attribute field that element increases an entitled Elevation, type is floating type, so as to the knowledge of the line feature elevation in AutoCAD
Not；
Step 3.3.6, lightweight water level isopleth control point：In ArcGis, using " generalization " instrument, according to displaying precision
It needs, generalization on water level equivalence line feature vertex is carried out by a certain percentage, so that the model being subsequently generated more lightweight；
Step 3.3.7, cad file is saved as：In ArcGis, using exporting to cad tools, by the isopleth after lightweight
Shp figure layers save File As cad file；
Step 3.3.8, three-dimensional grid model is generated：It, will be in cad file in three dimensional design platform software MicroStation
Water level contour, which is referred to and is copied into, to be come, and using the contour mesh tool in mesh modeling tool set, by water level contour
It is generated as three-dimensional grid model.
Step 4, outdoor scene model, BIM design a model integrated with Calculation of Flood result：In Bentley three-dimensional collaborative designs
In the connect versions of platform MicroStation softwares, the three-dimensional live model stored with .3mx forms is connected
（The three-dimensional live model criteria form of ContextCapture productions）, and the engineering BIM design moulds shown with reference to other needs
Each moment flood three-dimensional grid model that type and step 3 make realizes that outdoor scene model, BIM design a model and Calculation of Flood result
The assembling of model integrates.
The three-dimensional dynamic exhibition of step 5, flood result：Model after will be integrated integrally imports Bentley rendering platforms
In LumenRT, its animation effect is set after assigning the material and transparency of water to each moment flood three-dimensional grid model, i.e., with one
Framing rate in chronological sequence sequentially shows and hides each moment flood three-dimensional grid model, final to realize based on three-dimensional live model
Flood three-dimensional dynamic exhibition.
Claims (3)
- It is 1. a kind of based on the flood model of BIM and three-dimensional live model structure and Dynamic Display method, it is characterised in that：By three-dimensional Design platform, geographical information platform, hydrodynamics Modeling Platform, three-dimensional live Modeling Platform carry out Cross Platform Technology fusion, should With three-dimensional live model construction high-precision flood model, and carry out three-dimensional dynamic exhibition；Step is as follows：The production of step 1, three-dimensional live model, DEM, orthography：Using three-dimensional live Modeling Platform, in the ground aerial photograph acquired in unmanned plane oblique photograph and measurement control point basis On, production outdoor scene model, orthography and DSM data；Software is handled by professional landform DSM erases Surface structure, grass Dem data is obtained after jungle band, it is spare to be finally converted into elevation scatterplot；Step 2, the structure of flood risk analysis model and calculating：Using the MIKE21 FM module construction two dimension flood models in the hydrodynamics Modeling Platform Mike groupwares, by precision It is required that subdivision terrain mesh, and the elevation scatterplot that steps for importing 1 makes carries out terrain mesh interpolation, sets and the grid The matched parameters of length and boundary condition complete structure and the calculating of two-dimentional flood model；The export and conversion of step 3, Calculation of Flood result：Each moment Calculation of Flood result is exported and is converted into three-dimensional grid model；Step 4, outdoor scene model, BIM design a model integrated with Calculation of Flood result：In the connect versions of Bentley three-dimensional cooperative design platform MicroStation softwares, connect and deposited with .3mx forms The three-dimensional live model of storage, and each moment flood made with step 3 step that designs a model with reference to the engineering BIM that other needs are shown As a result three-dimensional grid model realizes that outdoor scene model, BIM design a model and integrated with the assembling of Calculation of Flood results model；The three-dimensional dynamic exhibition of step 5, flood result：Model after described integrate integrally is imported in Bentley rendering platforms LumenRT, to each moment flood three-dimensional grid mould Type sets its animation effect after assigning the material and transparency of water, i.e., is in chronological sequence sequentially shown and hidden each with certain frame per second Moment flood three-dimensional grid model, it is final to realize the flood three-dimensional dynamic exhibition based on three-dimensional live model.
- It is 2. special according to claim 1 based on the flood model of BIM and three-dimensional live model structure and Dynamic Display method Sign is：In step 3, the method for each moment Calculation of Flood result being exported and being converted into three-dimensional grid model is：Step 3.1 is converted to each moment Calculation of Flood result by the instrument Mike2Shp of flood Modeling Platform MIKE itself The shp forms that ArcGis is used so as to obtain a series of shp results figure layer files, wrap in each shp results figure layer file Containing identical triangle of vectors Shaping element, each triangle of vectors Shaping element has every hydraulic elements such as water level, depth of water Attribute field；Step 3.2 needs to carry out the screening of result moment and result attribute according to front end displaying：In terms of the screening of result moment, According to displaying fluency screen, one is selected from multiple result moment, in terms of result attribute selection, only sieve Select water level and depth of water attribute；Step 3.3, the triangle of vectors Shaping element by each moment result shp figure layer files, in ArcGis, AutoCAD and In MicroStation softwares, three-dimensional grid model is converted to by same set of flow chart of data processing.
- It is 3. special according to claim 2 based on the flood model of BIM and three-dimensional live model structure and Dynamic Display method Sign is：In step 3.3, by the triangle of vectors face element of each moment result shp figure layer files, in ArcGis, AutoCAD and The data processing method that three-dimensional grid model is converted in MicroStation softwares is：Step 3.3.1, screening has the element of flood：In ArcGis, using " screening " instrument, from result shp figure layer files The triangle of vectors Shaping element that depth of water property value is more than 0 is filtered out, that is, the triangle of vectors Shaping element for having flood inundation on tracks；Step 3.3.2, face element is switched into an element, in ArcGis, using " element turning point " instrument, in vector triangle face Triangle of vectors Shaping element is switched to an element by element geometric center position, and element succession has triangle of vectors Shaping element Water level, depth of water attribute；Step 3.3.3, described element is switched into grid, in ArcGis, using " landform turnstile lattice " instrument in ArcGis, with The water level attribute field of point element is elevation field, is converted to an element with the resolution ratio that the same triangle centre plane length of side is close Grid；Step 3.3.4, water level isopleth is extracted：In ArcGis, using " isopleth " instrument, to meet flood Dynamic Display essence The spacing needed is spent, water level isopleth is extracted from grid, the water level isopleth after extraction has Contour attributes, generation Table water level value；Step 3.3.5, Height attribute field is added：In ArcGis, using " addition field " instrument, to the water level isopleth Element increase an entitled Elevation, type be floating type attribute field, so as in AutoCAD to line feature height The identification of journey；Step 3.3.6, lightweight water level isopleth control point：In ArcGis, using " generalization " instrument, according to displaying precision need It wants, generalization on water level equivalence line feature vertex is carried out by a certain percentage, so that the model being subsequently generated more lightweight；Step 3.3.7, cad file is saved as：In ArcGis, using exporting to cad tools, by the isopleth after lightweight Shp figure layers save File As cad file；Step 3.3.8, three-dimensional grid model is generated：In three dimensional design platform software MicroStation, by the cad file In the reference of water level contour and be copied into, and using the contour mesh tool in mesh modeling tool set, by the water Position contour lines creation is three-dimensional grid model.
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