CN106227930A - A kind of method of model identification being imported Flac3D by Midas based on Matlab - Google Patents
A kind of method of model identification being imported Flac3D by Midas based on Matlab Download PDFInfo
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- CN106227930A CN106227930A CN201610570888.1A CN201610570888A CN106227930A CN 106227930 A CN106227930 A CN 106227930A CN 201610570888 A CN201610570888 A CN 201610570888A CN 106227930 A CN106227930 A CN 106227930A
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- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
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Abstract
The invention discloses a kind of method of model identification being imported Flac3D by Midas based on Matlab, comprise the steps: to utilize Midas/GTS software that three-dimensional simulation model is modeled, then the stress and strain model module carried by Midas/GTS carries out the division of model meshes, generate free grid and map grids by tetrahedral grid maker and hybrid grid maker, and realize the coupling of grid node between different piece；Give the material properties that grid different piece is different；Matlab software is utilized to realize the conversion of model information text of Midas；Text is output as the imported file of the Flac of entitled .Flac3d and .dat of suffix, the File menu of Flac finds external mesh input interface, imports in Flac by path, show each group of grid.The zero defect that the present invention can realize between Midas software with Flac3D software is connected.
Description
Technical field
The present invention relates to the analogue simulation research field of Geotechnical Engineering, be specifically related to a kind of based on Matlab by Midas
Import the method for model identification of Flac3D.
Background technology
The investment energetically of the fast development economic in recent years along with China and infrastructure etc., relates under complicated geological environment
Geotechnical Engineering emerge in an endless stream.Along with the continuous progress in Geotechnical Engineering field, base pit engineering, Tunnel Engineering etc. also present out
Digging the trend that the degree of depth is deeper, excavation area is bigger, construction is more complicated, early the deepest the most domestic foundation ditch is about 20m,
The foundation ditch that the current degree of depth reaches 30-40m is the most not within minority, and tunnel excavation method is also developed into varied by simple Mining Method
Shallow buried covered excavation engineering method system.Under these circumstances, Geotechnical Engineering requires stricter for the specialty of designer and constructor.
Along with the fast development of computer industry, finite element stimulation means are widely applied.Midas/GTS and
Flac3D is two geotechnical engineering design and the research field the most universal numerical simulation software of application.Midas/GTS is a
The rock-soil mechanics analysis software that Korea S is outstanding, has powerful model pretreatment function.Midas/GTS software operation interface friend
Good, node can be set flexibly, set up geometric construction, carry out the operations such as Boolean calculation, moreover, import also by interface
Cad model file .dxf file and .fpn file are edited further.Software embeds powerful network topology and calculates merit
Can, it is possible to achieve map grids and the quick division of free grid.But Midas/GTS also has himself defect, its kernel algorithm
Calculate and unstable, the mistake in computation of the unknown usually occurs.In addition, stiffness matrix iteration meter is used due to its software itself
The implicit expression finite element algorithm calculated, has shown scarce capacity in terms of processing complex nonlinear model, has been easier to Equation Iterative occur
Unsuccessfully terminate calculating.Flac3D is that to carry out the three-dimensional quickly glug of Continuum Mechanics case study for geomaterial bright
Day analyze (finite difference) software, comprise abundant elastic and plastic properties material constitutive model, have static(al), seepage flow, creep, power and
5 kinds of computation schemas of temperature analysis, for the professional software of Geotechnical Engineering mechanical analysis." the mixing discrete method " used in Flac3D
Plasticity failure by shear and the Plastic Flow of medium of Rock And Soil can be simulated exactly.Display finite difference calculus is different from implicit expression
Finite element method, due to explicit representation and be formed without stiffness matrix, Time step takies less internal memory, saves and calculates money
Source, and Time step is the least, calculates more stable, have solve unstability, vibrate, the suitability that the problem such as cave in is stronger.So
Flac3D then seems the most difficult for the foundation of complex model, owing to Flac3D software operation interface is relatively simple, many
Operational order needs to utilize built-in voice FISH to write, and for a designer or researcher, difficulty is bigger.I.e.
Making to have grasped the using method of FISH language, the stress and strain model of the foundation and model that realize complex geometry in Flsc3D is still one
An individual difficult problem, even cannot realize.
Therefore, it is necessary to the advantage that two analyzes software be combined, abandon respective deficiency, it is achieved early stage Midas
Carrying out Geometric Modeling, stress and strain model, later stage Flac3D is analyzed calculating, and solves software interface problem for engineers and technicians.
Summary of the invention
For solving the problems referred to above, the invention provides a kind of model knowledge being imported Flac3D by Midas based on Matlab
Other method, it is achieved that Midas threedimensional model imports the method carrying out simulation calculation in Flac3D, solves Midas and Flac3D
Software interface problem.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of method of model identification being imported Flac3D by Midas based on Matlab, comprises the steps:
S1, utilize Midas/GTS software that three-dimensional entity model is modeled:
The three-dimensional entity model set up as required carries out crucial geometry parts subdivision and control point parameter extraction, utilizes
Physical model is drawn by the geometry input pre-processing module of Midas/GTS, cuts different parts or merging etc.
Process, simultaneously for increasingly complex three-dimensional entity model, use CAD to import .dxf file and edit；
After S2, three-dimensional entity model are built up, the stress and strain model module carried by Midas/GTS carries out drawing of model meshes
Point, generate free grid and map grids by tetrahedral grid maker and hybrid grid maker, and realize different piece
Between the coupling of grid node；Different material properties is given to different piece, it is simple to follow-up importing after stress and strain model
Flac3D is more prone to analyze；
S3, utilize Midas/GTS software that three dimensional structure unit is modeled: complete at three-dimensional entity model stress and strain model
On the basis of, draw construction unit as required in relevant position, or utilize geometrical line (face) to divide coupled structure unit, and compose
Give different material properties；
S4, Matlab software is utilized to realize the conversion of model information text of Midas:
After three-dimensional simulation model has been set up in Midas, utilize the model information list function in Midas instrument with text
The nodal information of the form output model of file and unit information；Utilize Matlab carry out nodal information and unit information read with
Identifying, the nodal information of model, unit information, grouping information are carried by the model information modified module through Matlab compiling
Take, and its document form that can import with Flac is carried out data conversion, obtain transformation model text；
S5 into, the text of physical grid and construction unit grid is changed the Flac of entitled .Flac3d and .dat of suffix
Imported file, the File menu of Flac finds external mesh input interface, imports in Flac by path, show each group
Grid, the load that again it can be carried out postorder and the applying of boundary condition.
In the present invention due to Midas output gridding information the most consistent with the gridding information that can import in Flac3D, its
The middle code method for expressing representing trellis-type is different, and the node sequence of each type cell also differs, and Matlab is soft
The compilation facility of part self is powerful, and has huge function library and can call, and can accurately realize the conversion of data message.
The method have the advantages that
By the method for model identification of the present invention, it is possible to achieve the zero defect between Midas software and Flac3D software is even
Connect, both avoided engineers and technicians and researcher and taken considerable time essence for FISH language in research Flac3D
Power, overcome again Midas for multi-non-linear problem, the large deformation problem relating to destruction, power etc. weakness in place of.
Accompanying drawing explanation
Fig. 1 is the flow chart of the embodiment of the present invention method of model identification being imported Flac3D by Midas based on Matlab.
Fig. 2 is that in the embodiment of the present invention method of model identification being imported Flac3D by Midas based on Matlab, model turns
Change block flow diagram.
Detailed description of the invention
In order to make objects and advantages of the present invention clearer, below in conjunction with embodiment, the present invention is carried out further
Describe in detail.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to limit this
Bright.
As depicted in figs. 1 and 2, embodiments provide and a kind of based on Matlab imported Flac3D by Midas
Method of model identification, it is achieved that import the method for model identification Flac3D from Midas software threedimensional model, includes three-dimensional mould altogether
Type modeling, model file conversion and model computational analysis；Concrete: comprise the steps:
S1, utilize Midas/GTS software that three-dimensional entity model is modeled:
The three-dimensional entity model set up as required carries out crucial geometry parts subdivision and control point parameter extraction, utilizes
Physical model is drawn by the geometry input pre-processing module of Midas/GTS, cuts different parts or merging etc.
Process, simultaneously for increasingly complex three-dimensional entity model, use CAD to import .dxf file and edit；
After S2, three-dimensional entity model are built up, the stress and strain model module carried by Midas/GTS carries out drawing of model meshes
Point, generate free grid and map grids by tetrahedral grid maker and hybrid grid maker, and realize different piece
Between the coupling of grid node；Different material properties is given to different piece, it is simple to follow-up importing after stress and strain model
Flac3D is more prone to analyze；
S3, utilize Midas/GTS software that three dimensional structure unit is modeled: complete at three-dimensional entity model stress and strain model
On the basis of, draw construction unit as required in relevant position, or utilize geometrical line (face) to divide coupled structure unit, and compose
Give different material properties；
S4, Matlab software is utilized to realize the conversion of model information text of Midas:
After three-dimensional simulation model has been set up in Midas, utilize the model information list function in Midas instrument with text
The nodal information of the form output model of file and unit information；Utilize Matlab carry out nodal information and unit information read with
Identifying, the nodal information of model, unit information, grouping information are carried by the model information modified module through Matlab compiling
Take, and its document form that can import with Flac is carried out data conversion, obtain transformation model text；
S4 into, physical grid and construction unit text are changed respectively the file dish of entitled .Flac3d and .dat of suffix
List finds external mesh input interface, imports in Flac by path, show each group of grid, again it can be carried out the lotus of postorder
Carry and the applying of boundary condition.
Originally on the basis of the d solid modeling described in being embodied as is built upon Midas software platform, according to it certainly
The pre-treatment program that body embeds, it is possible to achieve modeling rendering, the importing of model framework, pattern checking, dividing elements, attribute packet
Deng.During three-dimensional entity model is set up, utilize the existing function of tool kit of Midas, entity is set up, can expand
The modelling operability easily such as exhibition, duplication, sweeping, and built geometric model checks by available software audit function, right
A little deleting in repeating, short-term and little face merge.After generating three-dimensional entity model, according to grid model grid division,
Providing the physical grid cell type that tetrahedron, hexahedron, sphenoid, pyramid etc. are abundant in Midas, powerful grid is opened up
Flutter computing function and can realize the grid automatic partition of complex nonlinear entity geometry, be also with grid node and control functional realiey
The grid optimization in thin portion.After physical grid divides, Midas can provide construction unit suction unit, copied cells, extension
The conveniently construction unit modeling method such as unit.Finally, net is given according to different material parameters and different operating modes
Lattice different grouping (notes: can not be with space in packet).
Described model file modular converter is as shown in Figure 2.First by nodal information and the list of Midas software reduced model
Metamessage.Utilize the compiler in Matlab nodal information text and unit information text to be imported, and realize
The classification of content information.First the form of nodal information is compiled, writes node number and the three-dimensional coordinate number of node successively.
Then the form of unit information is compiled, for solid element, first the type of unit is classified: hexahedron, four
Face body, sphenoid, pyramid.In Flac3D, above four kinds of grid cell type codes are respectively as follows: B8, T4, W6 and P5.Press
According to different units type, the node sequence of unit is rearranged, to ensure the correct identification of Flac3D software.Identify not
With the group names of grid cell, Do statement is utilized to be included in different grouping by different grid cells.For construction unit,
Need, according to importing the nodal information in Matlab, to recompilate construction unit nodal information form, and by construction unit unit
Number, cell node number, the information such as unit packet extracts and rearranges.Finally output Flac3D discernible text literary composition
Part.
Described model computation analysis module, for module existing in Flac3D, converts form in Flac3D
File imports herein, checks whether that appearance is abnormal or models mistake.Utilize the FISH language of Flac3D to 3D solid mould
Type carries out the applying of the imparting of material properties, boundary condition and load, and sets up corresponding operating mode, carries out computational analysis.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (1)
1. the method for model identification being imported Flac3D by Midas based on Matlab, it is characterised in that include walking as follows
Rapid:
S1, utilize Midas/GTS software that three-dimensional entity model is modeled:
The three-dimensional entity model set up as required carries out crucial geometry parts subdivision and control point parameter extraction, utilizes Midas/
Physical model is drawn by the geometry input pre-processing module of GTS, cuts different parts or merging treatment, with
Time, for increasingly complex three-dimensional entity model, use CAD to import .dxf file and edit；
After S2, three-dimensional entity model are built up, the stress and strain model module carried by Midas/GTS carries out the division of model meshes,
Generate free grid and map grids by tetrahedral grid maker and hybrid grid maker, and realize net between different piece
The coupling of lattice node；Different material properties is given to different piece after stress and strain model；
S3, utilize Midas/GTS software that three dimensional structure unit is modeled: at the base that three-dimensional entity model stress and strain model is complete
On plinth, draw construction unit as required in relevant position, or utilize geometrical line (face) to divide coupled structure unit, and give not
Same material properties；
S4, Matlab software is utilized to realize the conversion of model information text of Midas:
After three-dimensional simulation model has been set up in Midas, utilize the model information list function in Midas instrument with text
The nodal information of form output model and unit information；Utilize Matlab to carry out nodal information read with unit information and know
Not, the nodal information of model, unit information, grouping information are carried by the model information modified module through Matlab compiling
Take, and its document form that can import with Flac is carried out data conversion, obtain transformation model text；
S5 into, physical grid and construction unit text are changed respectively the leading of Flac of entitled .Flac3d and .dat of suffix
Enter file, the File menu of Flac find external mesh input interface, imports in Flac by path, show each group of grid,
The load that again it can be carried out postorder and the applying of boundary condition.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107403467A (en) * | 2017-08-09 | 2017-11-28 | 浙江群力电气有限公司 | A kind of data modeling system and method |
| CN108090313A (en) * | 2018-02-05 | 2018-05-29 | 东北大学 | A kind of Complex Rock model of fissuration models recognition methods |
| CN109002612A (en) * | 2018-07-18 | 2018-12-14 | 山西省交通科学研究院 | A kind of MIDAS fast modeling method based on MATLAB |
| CN109242965A (en) * | 2018-07-02 | 2019-01-18 | 中国科学院武汉岩土力学研究所 | A kind of model conversion method that 3DEC is imported by Midas based on c# |
| CN109858161A (en) * | 2019-02-01 | 2019-06-07 | 东北大学 | A kind of Abaqus Meshing Method based on Midas modeling and Matlab conversion |
| CN112528515A (en) * | 2020-12-22 | 2021-03-19 | 华南理工大学 | FLAC based on hybrid programming technology3DComplex model identification method |
| CN112613108A (en) * | 2020-12-30 | 2021-04-06 | 中交上海三航科学研究院有限公司 | Tunnel deformation simulation calculation method and device |
| CN112818443A (en) * | 2021-01-14 | 2021-05-18 | 中交上海三航科学研究院有限公司 | FLAC3D preprocessing method and equipment for tunnel parametric modeling |
| CN113011072A (en) * | 2021-03-30 | 2021-06-22 | 华南理工大学 | Discrete element complex model identification method based on MIDAS-PFC3D |
| CN115965764A (en) * | 2022-11-21 | 2023-04-14 | 中国地质大学（北京） | Complex geological model tetrahedral mesh division method and device for calculating surface subsidence |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107403467A (en) * | 2017-08-09 | 2017-11-28 | 浙江群力电气有限公司 | A kind of data modeling system and method |
| CN108090313A (en) * | 2018-02-05 | 2018-05-29 | 东北大学 | A kind of Complex Rock model of fissuration models recognition methods |
| CN109242965A (en) * | 2018-07-02 | 2019-01-18 | 中国科学院武汉岩土力学研究所 | A kind of model conversion method that 3DEC is imported by Midas based on c# |
| CN109242965B (en) * | 2018-07-02 | 2019-08-30 | 中国科学院武汉岩土力学研究所 | A kind of model conversion method that 3DEC is imported by Midas based on c# |
| CN109002612A (en) * | 2018-07-18 | 2018-12-14 | 山西省交通科学研究院 | A kind of MIDAS fast modeling method based on MATLAB |
| CN109858161A (en) * | 2019-02-01 | 2019-06-07 | 东北大学 | A kind of Abaqus Meshing Method based on Midas modeling and Matlab conversion |
| CN112528515A (en) * | 2020-12-22 | 2021-03-19 | 华南理工大学 | FLAC based on hybrid programming technology3DComplex model identification method |
| CN112528515B (en) * | 2020-12-22 | 2022-09-20 | 华南理工大学 | FLAC based on hybrid programming technology 3D Complex model identification method |
| CN112613108A (en) * | 2020-12-30 | 2021-04-06 | 中交上海三航科学研究院有限公司 | Tunnel deformation simulation calculation method and device |
| CN112818443A (en) * | 2021-01-14 | 2021-05-18 | 中交上海三航科学研究院有限公司 | FLAC3D preprocessing method and equipment for tunnel parametric modeling |
| CN113011072A (en) * | 2021-03-30 | 2021-06-22 | 华南理工大学 | Discrete element complex model identification method based on MIDAS-PFC3D |
| CN113011072B (en) * | 2021-03-30 | 2023-04-21 | 华南理工大学 | Discrete element complex model identification method based on MIDAS-PFC3D |
| CN115965764A (en) * | 2022-11-21 | 2023-04-14 | 中国地质大学（北京） | Complex geological model tetrahedral mesh division method and device for calculating surface subsidence |
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Inventor after: Zhao Wen Inventor after: Han Jianyong Inventor after: Bai Qian Inventor after: Zhao Zhen Inventor after: Jia Pengjiao Inventor after: Wang Chao Inventor after: Chen Yang Inventor before: Zhao Wen Inventor before: Han Jianyong Inventor before: Jia Pengjiao Inventor before: Wang Chao Inventor before: Chen Yang |
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Application publication date: 20161214 |