CN111079266A - Periodic numerical model generation method and device for heterogeneous rock-soil material - Google Patents
Periodic numerical model generation method and device for heterogeneous rock-soil material Download PDFInfo
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Abstract
The invention discloses a random generation method of a periodic numerical model of a heterogeneous rock-soil material, which comprises the following steps: structural parameter data of the heterogeneous rock soil body to be simulated; determining a region for putting the material particles; in the determined area, randomly generating positions of the material particles in sequence, and putting the material particles to the generated positions; translating and copying the particles contacted with the boundary vertex to the rest vertexes; replicating and translating particles in contact with the zone boundaries onto opposite sides of the respective zone boundaries; abandoning the feeding of the particles contacted with the generated particles; and pruning the material particle rock-soil body model after the particle putting is finished, and then carrying out grid periodic subdivision to generate a periodic numerical model of the heterogeneous rock-soil body to be simulated. The method can generate the rock-soil material numerical model which accords with the internal structure parameters of the heterogeneous rock-soil body according to the numerical test requirements, is used for the mechanical parameter simulation test analysis of the heterogeneous rock-soil material, determines the heterogeneous rock-soil material through numerical simulation, and can save the physical test cost.
Description
Technical Field
The invention relates to the technical field of research on mechanical parameters of heterogeneous rock-soil materials, in particular to a periodic numerical model generation method and device of the heterogeneous rock-soil materials considering particle boundary putting.
Background
Most of the geotechnical materials are heterogeneous structures, such as common artificial material concrete and natural material accumulation bodies. The mesostructure inside the heap is complex and the mesostructural features of the aggregate distribution play an important role in the mechanical properties of the material. The indoor test research of the material has many problems, such as difficult sampling, sample disturbance, large result discreteness, smaller test scale compared with the internal structure scale, and the like.
With the development of computer hardware and numerical analysis technology, the physical and mechanical parameters of inhomogeneous geotechnical materials (such as concrete and accumulation bodies) are developed rapidly in recent years by numerical methods, and the methods can well overcome many problems in the research of real test parameters and become one of important research tools.
Establishing a digital model consistent with the internal structure of the heterogeneous rock-soil material is the first step for developing numerical simulation analysis. Therefore, the generation of the heterogeneous rock-soil material according to the internal structure parameters (such as aggregate grading, aggregate shape and the like) and meeting the numerical test requirements is a hot point of the current research. A large number of related literature researches show that the numerical simulation method is an important tool for researching mechanical properties of the heterogeneous rock soil body material. However, modeling of non-homogeneous geotechnical bulk materials in these studies is overly simplified, generally not considering the situation where the particles are on the boundary, resulting in spatial distribution of the particles that is different from the actual situation. When a particle is placed on a boundary, the particle is cut by the boundary surface, and the volume or area of the cut particle needs to be calculated, which increases the calculation difficulty, so for the sake of simplicity, the current research assumes that the particle is inside the model. Furthermore, with the advent of multi-scale methods, the periodicity of numerical models appears to be important for multi-scale analysis.
Disclosure of Invention
The invention aims to provide a periodic numerical model generation method and a device for heterogeneous rock-soil materials, which can generate a numerical model according with the internal structure parameters of the actual heterogeneous rock-soil materials according to the numerical test requirements, are used for the mechanical parameter simulation test analysis of the heterogeneous rock-soil materials, overcome the problems of difficult sampling, sample disturbance, large result discreteness, smaller test scale compared with the internal structure scale and the like in the real test parameter research, and improve the reliability of the test analysis result.
The technical scheme adopted by the invention is as follows.
In one aspect, the invention provides a periodic numerical model generation method for a heterogeneous rock-soil material, which comprises the following steps:
acquiring structural parameter data of a heterogeneous rock soil body to be simulated;
determining a material particle throwing area, a boundary and a vertex thereof according to the acquired structural parameter data;
in the determined area, randomly generating positions of the material particles in sequence, and putting the material particles to the generated positions;
in the process of putting each material particle: in response to the boundary vertex being located inside the material particle, then translationally replicating the corresponding material particle onto the remaining vertices; in response to the material particle coming into contact with the region boundary, translationally replicating the respective material particle onto opposite sides of the respective region boundary; in response to the material particles being entirely within the region but in contact with the dispensed material particles, or in response to the translationally replicated material particles being in contact with the dispensed material particles, dispensing is aborted and new particle locations are randomly generated again;
trimming the material particle rock-soil body model subjected to particle throwing along the region boundary;
and periodically subdividing the grid of the trimmed material particle rock-soil body model, namely generating a periodic numerical model of the heterogeneous rock-soil body to be simulated.
Further, the method of the invention also comprises the following steps: and carrying out a numerical test by using the generated periodic numerical model of the heterogeneous rock soil body to be simulated so as to determine the mechanical characteristics and the mechanical parameters of the actual heterogeneous rock soil body material corresponding to the model. The numerical test may be an existing uniaxial or triaxial numerical test.
When the method is applied, because the boundary effect is considered, the periodic boundary can improve the reliability of the test result and overcome various defects in the research process of real test parameters when the geotechnical material numerical test is carried out.
Optionally, the structural parameter data of the heterogeneous rock-soil mass includes a grain grading, a volume fraction, and other related structural parameter data.
Optionally, the material particle throwing area is rectangular, and the shape of the material particle adopts an ellipse or a polygon, and is generated according to the particle grading curve and the volume fraction.
As an embodiment, the indication that the granule dosing is completed is: and repeating the generation and the feeding operation of the material particle position to the set times, and finishing the particle feeding.
As another embodiment, the indication that the granule dosing is complete is: and the newly generated new particle positions are released to reach the set continuous times. If the continuous n times of putting are unsuccessful, the putting is finished, and the continuous times can be set according to experience.
Optionally, the performing the grid periodic subdivision on the trimmed material particle rock-soil mass model includes:
determining the number of grid nodes on each pair of parallel boundaries of a launching area;
and generating grid nodes and cells by utilizing a Delaunay subdivision algorithm according to the determined number of the grid nodes to obtain a finite element grid model, namely a periodic numerical model of the heterogeneous rock soil body to be simulated.
When the grid is divided, the periodicity of particle throwing is considered, and each line segment on the region boundary also has a line segment with the same length on the parallel boundary, so that the number of nodes is strictly controlled when the grid nodes are generated for each line segment on the rectangular region boundary, and the number of the grid nodes on the line segment at the corresponding position on the parallel boundary is ensured to be the same.
In another aspect, the present invention provides a periodic numerical model generating apparatus for heterogeneous rock-soil materials, including:
the data acquisition module is used for receiving externally input structural parameter data of the heterogeneous rock soil body to be simulated;
the throwing area determining module is used for determining the area for throwing the material particles, the boundary and the vertex of the area according to the acquired structural parameter data;
the particle putting module is used for sequentially and randomly generating positions of the material particles in the determined area and putting the material particles to the generated positions;
in the process of putting each material particle: in response to the boundary vertex being located inside the material particle, then translationally replicating the corresponding material particle onto the remaining vertices; in response to the material particle coming into contact with the region boundary, translationally replicating the respective material particle onto opposite sides of the respective region boundary; in response to the material particles being entirely within the region but in contact with the dispensed material particles, or in response to the translationally replicated material particles being in contact with the dispensed material particles, dispensing is aborted and new particle locations are randomly generated again;
the model pruning module is used for pruning the material particle rock-soil body model subjected to particle throwing along the region boundary;
and the grid subdivision module is used for periodically subdividing the trimmed material particle rock-soil body model to generate a periodic numerical model of the heterogeneous rock-soil body to be simulated.
In a third aspect, the present invention further provides a device for testing a value of a heterogeneous rock-soil material, including:
the data acquisition module is used for receiving externally input structural parameter data of the heterogeneous rock soil body to be simulated;
the throwing area determining module is used for determining the area for throwing the material particles, the boundary and the vertex of the area according to the acquired structural parameter data;
the particle putting module is used for sequentially and randomly generating positions of the material particles in the determined area and putting the material particles to the generated positions;
in the process of putting each material particle: in response to the boundary vertex being located inside the material particle, then translationally replicating the corresponding material particle onto the remaining vertices; in response to the material particle coming into contact with the region boundary, translationally replicating the respective material particle onto opposite sides of the respective region boundary; in response to the material particles being entirely within the region but in contact with the dispensed material particles, or in response to the translationally replicated material particles being in contact with the dispensed material particles, dispensing is aborted and new particle locations are randomly generated again;
the model pruning module is used for pruning the material particle rock-soil body model subjected to particle throwing along the region boundary;
the grid subdivision module is used for periodically subdividing the trimmed material particle rock-soil body model to generate a periodic numerical model of the heterogeneous rock-soil body to be simulated;
and the numerical test module is used for carrying out numerical test on the simulated heterogeneous rock-soil body by utilizing the generated periodic numerical model to obtain the mechanical characteristics and the mechanical parameters of the simulated heterogeneous rock-soil body.
Advantageous effects
The periodic numerical model of the heterogeneous rock-soil material can be used for generating a numerical model of an actual heterogeneous rock-soil material required in a numerical test, and can solve the problems of difficult sampling, sample disturbance, large result discreteness, small test scale compared with the internal structure scale and the like in the research of real test parameters when being used for the mechanical parameter simulation test analysis of the heterogeneous rock-soil material. Meanwhile, in the process of generating the model, the invention considers the boundary effect, so that the generated numerical model can better accord with the internal structure parameters of the heterogeneous rock-soil body, and the reliability of the test analysis result can be improved.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention;
FIG. 2 is a schematic diagram illustrating the principle of particle delivery during the process of the present invention;
FIG. 3 is a schematic diagram showing the effect of particle delivery during the process of the present invention;
FIG. 4 is a schematic view of model pruning;
fig. 5 is a schematic diagram of gridding and subdividing.
Detailed Description
The following further description is made in conjunction with the accompanying drawings and the specific embodiments.
Example 1
The embodiment is a method for generating a periodic numerical model of a typical heterogeneous geotechnical material-accumulation body material, and is shown in fig. 1, and includes:
acquiring structural parameter data of a heterogeneous rock soil body to be simulated;
determining a material particle throwing area, a boundary and a vertex thereof according to the acquired structural parameter data;
in the determined area, randomly generating positions of the material particles in sequence, and putting the material particles to the generated positions;
in the process of putting each material particle: in response to the boundary vertex being located inside the material particle, then translationally replicating the corresponding material particle onto the remaining vertices; in response to the material particle coming into contact with the region boundary, translationally replicating the respective material particle onto opposite sides of the respective region boundary; in response to the material particles being entirely within the region but in contact with the dispensed material particles, or in response to the translationally replicated material particles being in contact with the dispensed material particles, dispensing is aborted and new particle locations are randomly generated again;
trimming the material particle accumulation body model after the particles are put in along the boundary of the region;
and periodically subdividing the grid of the trimmed material particle accumulation model to generate a periodic numerical model of the heterogeneous rock soil body to be simulated.
Examples 1 to 1
On the basis of embodiment 1, in this embodiment:
the structural parameter data of the heterogeneous rock-soil mass includes grain grading, volume fraction, and other relevant structural parameter data.
The material particle throwing area is rectangular, the shape of the material particles adopts an ellipse or a polygon, and the material particles are generated according to a particle grading curve and the volume fraction.
The indication that the particle dosing is complete may be: repeating the generation and the feeding operation of the material particle position to set times, and finishing the particle feeding; or the newly generated particle positions are released as a result of releasing the particles for a set number of consecutive times. If the continuous n times of putting are unsuccessful, the putting is finished, and the continuous times can be set according to experience.
The grid periodical subdivision on the trimmed material particle accumulation model comprises the following steps:
determining the number of grid nodes on each pair of parallel boundaries of a launching area;
and generating grid nodes and cells by utilizing a Delaunay subdivision algorithm according to the determined number of the grid nodes to obtain a finite element grid model, namely a periodic numerical model of the heterogeneous rock soil body to be simulated.
When the grid is divided, the periodicity of particle throwing is considered, and each line segment on the region boundary also has a line segment with the same length on the parallel boundary, so that the number of nodes is strictly controlled when the grid nodes are generated for each line segment on the rectangular region boundary, and the number of the grid nodes on the line segment at the corresponding position on the parallel boundary is ensured to be the same.
The periodic numerical model generation method of the heterogeneous rock-soil material can be used for numerical tests, namely the method further comprises the following steps: and carrying out a numerical test by using the generated periodic numerical model of the heterogeneous rock soil body to be simulated so as to determine the mechanical characteristics and the mechanical parameters of the actual heterogeneous rock soil body material corresponding to the model. The numerical test may be an existing uniaxial or triaxial numerical test.
When the invention is applied, because of the boundary effect considered, the reliability of the test result can be improved when the numerical value test of the accumulation body is carried out, and various defects existing in the research process of real test parameters are overcome.
Examples 1 to 2
Based on the embodiment 1-1, the present embodiment specifically illustrates the steps of the periodic numerical model generation method for the heterogeneous rock-soil material as follows:
s1, obtaining the grading and volume fraction of the particles in the heterogeneous rock soil material to be simulated;
s2, determining the size of a rectangular area of the numerical model by using the rectangle as a material particle throwing area, determining the rectangular area, and determining the boundary and the vertex of the rectangular area;
s3, describing the shape of the particles by adopting an ellipse or a polygon, generating a series of particles according to the particle grading curve and the volume fraction, and putting the particles into the rectangular area by adopting a set particle putting algorithm:
when the particles are put in, for the particles with the boundary vertexes positioned in the particles, the corresponding particles are translated and copied to the other vertexes, the translation distance is the side length of the rectangle, and whether the four particles are in contact with other particles is judged; when the particles are in contact with the region boundary, copying and translating the corresponding particles to the opposite side of the corresponding region boundary, wherein the translation distance is the side length of a rectangle, and judging whether the two particles are in contact with other particles; if the translation and the copy are contacted with the thrown particles, the throwing is abandoned; when the particles are in the region again, judging the contact condition of the current particles and other thrown particles, wherein the condition is consistent with the traditional algorithm, and for the particles contacted with the generated particles, giving up the throwing and randomly generating a new particle position again;
s4, cutting the particles to remove the area outside the rectangle by taking the rectangle boundary as a base line after all the particles are produced and put in;
s5, mesh generation: each line segment on the rectangular boundary (after the particles on the boundary are cut, the boundary is changed from a line to a plurality of line segments), and a line segment with the same length is also arranged on the parallel boundary (since the particles are symmetrically thrown, the line segments on the boundary are also symmetrical). Therefore, considering the periodicity of particle delivery, for each line on the boundary of the rectangular region, the number of nodes is strictly controlled when generating the grid nodes, the number of nodes of line segments at corresponding positions on the parallel boundary is kept the same, then, the nodes are generated by adopting a Delaunay subdivision algorithm, and then, the generated nodes are formed into a unit, namely a finite element grid model;
and S6, carrying out single-axis or three-axis numerical simulation by using the generated numerical model, calculating a stress-strain relation, and determining the deformation and strength parameters of the heterogeneous rock-soil mass material.
The process of forming a stack having a periodic mesoscopic structure is described below using an example of a stack having a size of 1m in conjunction with fig. 1 to 5, to further illustrate the present invention. The heap is at a stone content of about 30% and the stone particles range in size from 5mm to 60 mm.
Firstly, 896 polygons with different sizes are generated according to particle grading and stone content, then the polygons are thrown into a square area of 1000 x 1000mm, in the process of throwing the particles, the position inside the area is randomly selected as the center of the particles, when the particles are contacted with the vertices of the square, the particles are translated to the other three vertices, and whether the four particles are contacted with the thrown particles is judged; when the particles are in contact with the side of the square and are not in contact with the vertex, moving the particles to the other side in parallel, and judging whether the two particles are in contact with the thrown particles or not; when the particles are not in contact with the edge or vertex, no additional processing is required, only a determination is made as to whether a particle is in contact with an already dispensed particle.
Randomly putting the particles: randomly generating the position of the particle, judging whether the particle is contacted with other particles, if not, throwing the particle, otherwise, randomly generating a new throwing position again, and then throwing the next particle, wherein the throwing result is shown in figure 3;
model boundary pruning: after all the particles are put into the container after being produced, trimming the particles by using a boundary line, and deleting the rectangular outer particle area to form a regular square structure, as shown in fig. 4;
periodically subdividing the grids: considering the periodicity of particle placement, each line segment on the rectangular boundary has a line segment with the same length on the parallel boundary, so that for each line on the rectangular region boundary, the number of nodes is strictly controlled when generating nodes, the number of nodes of the line segment at the corresponding position on the parallel boundary is kept the same, and then a Delaunay subdivision algorithm is adopted to generate nodes and units, namely a finite element mesh model, as shown in fig. 5.
Setting mechanical parameters of particles and matrix, carrying out a numerical mechanical test, determining the mechanical parameters of the accumulation body, and comparing the mechanical parameters with a real in-situ test and a traditional numerical analysis method without considering boundary contact, wherein the result shows that the parameters obtained by the research are closer to the test result, the result is slightly larger than the traditional numerical analysis result without considering boundary contact, and the improvement is 5-10 percent, so that the material parameters are more accurately predicted through the numerical test.
Example 2
The embodiment is a periodic numerical model generation device for heterogeneous geotechnical materials, which comprises:
the data acquisition module is used for receiving externally input structural parameter data of the heterogeneous rock soil body to be simulated;
the throwing area determining module is used for determining the area for throwing the material particles, the boundary and the vertex of the area according to the acquired structural parameter data;
the particle putting module is used for sequentially and randomly generating positions of the material particles in the determined area and putting the material particles to the generated positions;
in the process of putting each material particle: in response to the boundary vertex being located inside the material particle, then translationally replicating the corresponding material particle onto the remaining vertices; in response to the material particle coming into contact with the region boundary, translationally replicating the respective material particle onto opposite sides of the respective region boundary; in response to the material particles being entirely within the region but in contact with the dispensed material particles, or in response to the translationally replicated material particles being in contact with the dispensed material particles, dispensing is aborted and new particle locations are randomly generated again;
the model trimming module is used for trimming the material particle accumulation model subjected to particle feeding along the region boundary;
and the grid subdivision module is used for periodically subdividing the trimmed material particle accumulation body model to generate a periodic numerical model of the heterogeneous rock soil body to be simulated.
The function implementation process of each module above refers to the details of embodiment 1.
Example 3
The embodiment is a numerical test device of heterogeneous geotechnical material, includes:
the data acquisition module is used for receiving externally input structural parameter data of the heterogeneous rock soil body to be simulated;
the throwing area determining module is used for determining the area for throwing the material particles, the boundary and the vertex of the area according to the acquired structural parameter data;
the particle putting module is used for sequentially and randomly generating positions of the material particles in the determined area and putting the material particles to the generated positions;
in the process of putting each material particle: in response to the boundary vertex being located inside the material particle, then translationally replicating the corresponding material particle onto the remaining vertices; in response to the material particle coming into contact with the region boundary, translationally replicating the respective material particle onto opposite sides of the respective region boundary; in response to the material particles being entirely within the region but in contact with the dispensed material particles, or in response to the translationally replicated material particles being in contact with the dispensed material particles, dispensing is aborted and new particle locations are randomly generated again;
the model trimming module is used for trimming the material particle accumulation model subjected to particle feeding along the region boundary;
the grid subdivision module is used for periodically subdividing the trimmed material particle accumulation body model to generate a periodic numerical model of the heterogeneous rock soil body to be simulated;
and the numerical test module is used for carrying out numerical test on the simulated heterogeneous rock-soil body by utilizing the generated periodic numerical model to obtain the mechanical characteristics and the mechanical parameters of the simulated heterogeneous rock-soil body.
The function implementation process of each module above refers to the details of embodiment 1.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A periodic numerical model generation method for heterogeneous rock-soil materials is characterized by comprising the following steps:
acquiring structural parameter data of a heterogeneous rock soil body to be simulated;
determining a material particle throwing area, a boundary and a vertex thereof according to the acquired structural parameter data;
in the determined area, randomly generating positions of the material particles in sequence, and putting the material particles to the generated positions;
in the process of putting each material particle: in response to the boundary vertex being located inside the material particle, then translationally replicating the corresponding material particle onto the remaining vertices; in response to the material particle coming into contact with the region boundary, translationally replicating the respective material particle onto opposite sides of the respective region boundary; in response to the material particles being entirely within the region but in contact with the dispensed material particles, or in response to the translationally replicated material particles being in contact with the dispensed material particles, dispensing is aborted and new particle locations are randomly generated again;
trimming the material particle rock-soil body model subjected to particle throwing along the region boundary;
and periodically subdividing the grid of the trimmed material particle rock-soil body model, namely generating a periodic numerical model of the heterogeneous rock-soil body to be simulated.
2. The method of claim 1, further comprising: and carrying out a numerical test by using the generated periodic numerical model of the heterogeneous rock soil body to be simulated so as to determine the mechanical characteristics and the mechanical parameters of the actual heterogeneous rock soil body material corresponding to the model.
3. The method according to claim 1 or 2, wherein the structural parameter data of the heterogeneous geotechnical mass comprises grain grading, volume fraction, and other relevant structural parameter data.
4. The method as claimed in claim 1 or 2, wherein the area for dispensing the material particles is rectangular, and the shape of the material particles is elliptical or polygonal, and is generated according to the particle grading curve and the volume fraction.
5. A method according to claim 1 or 2, characterized in that the indication of completion of granule dosing is: and repeating the generation and the feeding operation of the material particle position to the set times, and finishing the particle feeding.
6. A method according to claim 1 or 2, characterized in that the indication of completion of granule dosing is: and the newly generated new particle positions are released to reach the set continuous times.
7. The method according to claim 1 or 2, wherein the mesh periodic subdivision of the trimmed material particle geotechnical body model comprises:
determining the number of grid nodes on each pair of parallel boundaries of a launching area;
and generating grid nodes and cells by utilizing a Delaunay subdivision algorithm according to the determined number of the grid nodes to obtain a finite element grid model, namely a periodic numerical model of the heterogeneous rock soil body to be simulated.
8. A periodic numerical model generation device for heterogeneous rock-soil materials is characterized by comprising the following components:
the data acquisition module is used for receiving externally input structural parameter data of the heterogeneous rock soil body to be simulated;
the throwing area determining module is used for determining the area for throwing the material particles, the boundary and the vertex of the area according to the acquired structural parameter data;
the particle putting module is used for sequentially and randomly generating positions of the material particles in the determined area and putting the material particles to the generated positions;
in the process of putting each material particle: in response to the boundary vertex being located inside the material particle, then translationally replicating the corresponding material particle onto the remaining vertices; in response to the material particle coming into contact with the region boundary, translationally replicating the respective material particle onto opposite sides of the respective region boundary; in response to the material particles being entirely within the region but in contact with the dispensed material particles, or in response to the translationally replicated material particles being in contact with the dispensed material particles, dispensing is aborted and new particle locations are randomly generated again;
the model pruning module is used for pruning the material particle rock-soil body model subjected to particle throwing along the region boundary;
and the grid subdivision module is used for periodically subdividing the trimmed material particle rock-soil body model to generate a periodic numerical model of the heterogeneous rock-soil body to be simulated.
9. The utility model provides a numerical test device of heterogeneous geotechnical material which characterized in that includes:
the data acquisition module is used for receiving externally input structural parameter data of the heterogeneous rock soil body to be simulated;
the throwing area determining module is used for determining the area for throwing the material particles, the boundary and the vertex of the area according to the acquired structural parameter data;
the particle putting module is used for sequentially and randomly generating positions of the material particles in the determined area and putting the material particles to the generated positions;
in the process of putting each material particle: in response to the boundary vertex being located inside the material particle, then translationally replicating the corresponding material particle onto the remaining vertices; in response to the material particle coming into contact with the region boundary, translationally replicating the respective material particle onto opposite sides of the respective region boundary; in response to the material particles being entirely within the region but in contact with the dispensed material particles, or in response to the translationally replicated material particles being in contact with the dispensed material particles, dispensing is aborted and new particle locations are randomly generated again;
the model pruning module is used for pruning the material particle rock-soil body model subjected to particle throwing along the region boundary;
the grid subdivision module is used for periodically subdividing the trimmed material particle rock-soil body model to generate a periodic numerical model of the heterogeneous rock-soil body to be simulated;
and the numerical test module is used for carrying out numerical test on the simulated heterogeneous rock-soil body by utilizing the generated periodic numerical model to obtain the mechanical characteristics and the mechanical parameters of the simulated heterogeneous rock-soil body.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111639452A (en) * | 2020-06-08 | 2020-09-08 | 四川大学 | Rigid and flexible material contact zone boundary setting and determining method in geotechnical engineering |
| CN113297718A (en) * | 2021-04-02 | 2021-08-24 | 长江水利委员会长江科学院 | Coarse particle material block system generation method and device, storage medium and equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102521485A (en) * | 2011-11-25 | 2012-06-27 | 中冶集团武汉勘察研究院有限公司 | Numerical simulation algorithm for engineering properties of coarse-grained soil by using DDA (Discontinuous Deformation Analysis) |
-
2019
- 2019-11-28 CN CN201911190818.3A patent/CN111079266A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102521485A (en) * | 2011-11-25 | 2012-06-27 | 中冶集团武汉勘察研究院有限公司 | Numerical simulation algorithm for engineering properties of coarse-grained soil by using DDA (Discontinuous Deformation Analysis) |
Non-Patent Citations (4)
| Title |
|---|
| G. DE SCHUTTER等: "Random particle model for concrete based on Delaunay", 《MATERIALS AND STRUCTURES》 * |
| Q.X. MENG等: "A numerical homogenization study of the elastic property of a soil-rock mixture using random mesostructure generation", 《COMPUTERS AND GEOTECHNICS》 * |
| Z.M. WANG等: "Mesoscopic study of concrete I: generation of random aggregate structure and finite element mesh", 《COMPUTERS AND STRUCTURES》 * |
| 申长雨: "《塑料模具计算机辅助工程》", 31 October 1998, 河南科学技术出版 * |
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| CN111639452B (en) * | 2020-06-08 | 2021-07-13 | 四川大学 | Rigid and flexible material contact zone boundary setting and determining method in geotechnical engineering |
| CN113297718A (en) * | 2021-04-02 | 2021-08-24 | 长江水利委员会长江科学院 | Coarse particle material block system generation method and device, storage medium and equipment |
| CN113297718B (en) * | 2021-04-02 | 2022-05-20 | 长江水利委员会长江科学院 | Coarse particle material block system generation method and device, storage medium and equipment |
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