CN107590327A - A kind of layering and zoning method that cement-based material particle three-dimensional is launched at random - Google Patents
A kind of layering and zoning method that cement-based material particle three-dimensional is launched at random Download PDFInfo
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Abstract
The invention discloses a kind of layering and zoning method that cement-based material particle three-dimensional is launched at random, comprise the following steps：The generation in cement-based material three dimensional particles storehouse to be put；Particle launches the determination of sequence；Launch the layering and zoning division in region；The intelligence dispensing of particle.The present invention is divided in a certain order using layering and zoning method by region is launched, and selects different Sub-region and hierarchicals to identify according to the actual conditions launched every time, preliminary to realize intelligent launch.Cement particle position completely random in traditional put-on method is overcome, and the defects of segmentation such as pours at the actual condition can not be simulated in Mass Concrete.It can be built by layering and zoning put-on method proposed by the present invention suitable for launching a large amount of particles, simulate the intelligent particle domestic model of different tightness degrees.
Description
Technical field
The present invention relates to the method for numerical simulation that a kind of cement-based material particle three-dimensional is launched at random, specifically a kind of cement
The layering and zoning put-on method that sill particle three-dimensional is launched at random.
Background technology
The three-dimensional layering and zoning that particle is carried out in cement-based material is launched, can be with real simulation concrete construction such as
Pour, be the basis of cement-based material macro property under the conditions of the true particle size distribution of research.The particle three of cement-based material
The reasonability of numerical simulation result of Microstructure of Cement-based Material can be influenceed by tieing up the reasonability of random launch process, and then be influenceed
To the reliability of the Numerical results of cement-based material macro property.
Traditional cement granules three-dimensional random, which launches method, can simulate the result that particle is launched at random in dispensing region, will
Cement granules press radius and are entirely launching random generation position in region one by one from big to small, only not overlapping between guarantee particle,
This method can be launched simply and efficiently launching region at random, but it is smaller when launching a large amount of cement granules radius to be present
Particle can not finally find suitable random placement position the defects of.Actual concreting requirement is by certain thickness, secondary
Sequence, direction placement layer by layer, it is closely knit to ensure that concrete base pours.Especially when simulating casting of concrete in mass process, more
Need layering and zoning to launch, the duration could be shortened, improve efficiency.And traditional random put-on method is due to random in whole region
Launch, can not ensure that the particle packing for launching bottom section is closely knit enough, and can not intelligently be launched according to actual input situation, will
Cement granules are thrown to suitable region, reduce follow-up vibrate and reach the time of overall closely knit balance.In addition, cement-based material
The tightness degree of grain distribution can influence the macro property of cement-based material, and Sub-region and hierarchical put-on method can simulate difference closely
The distribution of particles of degree, and then the tightness degree of research cement-based material distribution of particles is to the shadow of the macro property of cement-based material
Ring.
Therefore, for the particle three-dimensional in cement-based material, the problem of launching conducts a research at random, proposes rational layering point
Area's put-on method, build even particle distribution and meet actual cement-based material particle three-dimensional spatial model, it is true to simulating
Concreting process, optimize casting of concrete in mass scheme, there is highly important academic significance and engineer applied valency
Value.
The content of the invention
The purpose of the present invention is the deficiency for above-mentioned background technology, there is provided the layering and zoning that cement granules are launched at random
Method, casting of concrete in mass construction can effectively be simulated according to the Huan Cenghuan areas mark that different dispensing Foreground selections is different
Process, solve particle domestic model in conventional numerical simulation be not inconsistent with true concreting model, can not be intelligently efficient
Launch the technical problems such as larger dispensing region.
The present invention is achieved through the following technical solutions above-mentioned purpose：
A kind of layering and zoning method that cement-based material particle three-dimensional is launched at random, comprises the following steps：
Step 1: establish cement system cement granules storehouse to be put：
Selected cement granules shape, the particle diameter distribution PSD of cement granules to be put is obtained by laser particle size analyzer,
It is assumed that ratio of mud w/c, cement density ρc, whole region cumulative volume of launching is v, then cement granules cumulative volume is 1/ (1+ ρc(w/
c))×v.And then according to PSD, it is possible to determine the number and total number N of the cement granules of every kind of different-grain diameter, generate to be put
Cement granules storehouse.
Step 2: determine that cement granules launch sequence：
All cement granules, generation one are selected one by one using the random machine of random number from the cement granules storehouse of step 1 generation
Individual dispensing sequence, i.e., it is ranked up by the order selected at random to N number of cement granules.One group of radius is randomly selected using random number
Cement granules, first particle is taken out at random from the group, as launching the of sequence because of an individual particle.Repeat the above steps,
Take out the particle in particle storehouse successively, produce in sequence the 2nd, 3 ... N number of particle.If interior of certain randomly selected radius group
Grain is 0, then produces the particle of one group of new radius of new random number selection.Until the particle in particle storehouse is all transferred to particle throwing
Put sequence.
Step 3: particle launches the layering in region, subregion：
Whole cement granules region to be put is layered by casting concrete method in practice of construction, according to total water
Mud particle number, whole region of launching is divided at least two layers with its short transverse；Actual coagulation is pressed into each layer of dispensing region
The order subregion that soil pours, it is multiple areas that every layer, which is launched region division,；Intermediate region is first poured during general casting concrete, then it is fixed
The intermediate region that justice is launched at first is 1st area, is left 8 areas and is defined as 2nd to 9 area successively.
Step 4: launch cement granules：
It is divided good to step 3 kind that cement granules dispensing is taken out successively by the order of particle dispensing sequence in step 2
Floor, area dispensing area in, until launched N number of cement granules；
Step 4: region concrete scroll situation is launched in analysis：
The whole particle number for launching different-grain diameter in the Nei Meicengmei areas of region of analysis, draws form, lists in each area
Concrete scroll, and the number of adjacent particle in cement granules certain limit is calculated, for evaluating cement granules subregion point
The quality that layer is launched.
Further improve, it is spherical to draft cement granules.
Further improve, described to launch the cube that region is 100um*100um*100um, minimum unit is that size is
1um square volumetric pixel, i.e. cement and water occupy 106The space of individual pixel, represent (the 1+ ρ of cement number of pixels i.e. 1/c(w/c))
× 1000000, the corresponding unique three-dimensional coordinate of each pixel.
Further improve, during the dispensing cement granules, first pour the intermediate region of bottom, be then followed by launching the layer its
His region, then change layer and launch second layer intermediate region, launch successively.
Further improve, when carrying out cement granules dispensing, position that next particle is launched must not with when the particle in proparea
Position have it is overlapping, if position have it is overlapping, just when proparea find find other nonoverlapping positions at random；If when in proparea
Suitable placement position can not be found at random, and Ze Huan areas are launched.This position is not some pixel coordinate, using certain coordinate as ball
The heart, r are radius, the ball of generation, and other balls are at most tangent with this ball, it is impossible to it is overlapping, in this application, only require the centre of sphere it
Between distance cannot not ensured that overlappingly more than or equal to two radiuses of the ball.
Further improve, the particle position to being generated at random in each area need to meet that border detection and contact detect.
Border detection is that the particle centre of sphere currently to be launched is all higher than being equal to the particle radius to the distance in six faces around the area.Contact
Be detected as the particle currently to be launched must not have with the particle position launched before it is overlapping.Meet border detection and contact detection
Particle is launched successfully on the random site.Launch successful particle and remove dispensing sequence.If it is unsatisfactory for border detection
Or contact detection, then random site is found again.Correct position can not be also found more than 100 times, the particle is just transferred to throwing
The last position of sequence is put, launches next particle in particle dispensing sequence.
Further improve, when carrying out particle dispensing, change area's dispensing mark be set to each area throw fixation particle number n it is every
The particle number that individual area is launched is more than n Ji Huan areas.
Further improve, the n can be set to the total number in N/ areas, and n is positive integer.
Further improve, the n is setting fixed value, and the fixed value is less than N.
Further improve, when carrying out particle dispensing, the mark for changing area is set to when the dispensing of proparea Tou Manzaihuan areas, if currently
All particles to be put in some area can not generate suitable position Ji Huan areas in the area.
Relative to prior art, the present invention has the advantages that：
This method has the prominent advantages that Sub-region and hierarchical put-on method, which is applicable, launches a large amount of three dimensional particles, tentatively realizes intelligence
Energyization launches cement granules, can simulate actual concreting process, and can simulate the jettison system of different compaction rates, is
Optimization casting of concrete in mass construction lays the foundation.Particle placement position caused by overcoming traditional random dispensing method is complete
It is complete random, and the too low defect of application efficiency in casting of concrete in mass, cement granules is entirely being launched in region
Distribution can require that cement granules are launched in intellectuality closer to actual conditions according to launching.
Brief description of the drawings
Fig. 1 launches analyzed area for cement granules in the present invention and divides schematic diagram.
Fig. 2 is particle launch process schematic diagram in the embodiment of the present invention 1.
Fig. 3 is cement granules adjacent particle number schematic diagram in embodiment 1 in the present invention.
Fig. 4 is particle launch process schematic diagram in the embodiment of the present invention 2.
Fig. 5 is cement granules adjacent particle number schematic diagram in embodiment 2 in the present invention.
Embodiment
To make the purpose of the present invention and technical scheme clearer, the skill below in conjunction with the embodiment of the present invention to the present invention
Art scheme is clearly and completely described.
Embodiment 1：
The present embodiment is the instantiation 1 of cement-based material three dimensional particles Sub-region and hierarchical put-on method, is comprised the following steps：
The generation in step 1, cement system cement granules storehouse to be put
Determine to treat that the cement-based material particle jettison system of numerical simulation selects the Nanjing south of the River-small wild water in field in the present embodiment
The type portland cements of PII 52.5 of mud Co., Ltd production, obtain the real particle diameter distribution information of the cement granules such as institute of table 1
Show.It is assumed that the cement granules in the present embodiment are spherical, the ratio of mud w/c of cement granules jettison system, dispensing region are
100um*100um*100um square, minimum unit are the square volumetric pixel that size is 1um.Therefore cement and water occupy 106
The space of individual pixel, represent (the 1+ ρ of cement number of pixels i.e. 1/c(w/c))×1000000.Then according to corresponding to spheric granules
Square pixel relationship (spheric granules of different radii occupies the square volumetric pixel of different numbers) is assured that every kind of particle diameter
Cement granules number.When setting the ratio of mud as 0.6, the specifying information before particle is launched is as shown in table 1.
Step 2, particle launch the determination of sequence
Understand that cement granules to be put amount to 13 groups of radiuses, 3892 cement granules by step 1, therefore produce one 3892
The dispensing sequence of position.Certain number is randomly selected in 1 to 13 first, represents certain group radius.Then selected at random from this group of particle
One particle, the particle is transferred to the first place for launching sequence, other are subsequently transferred to the particle for launching sequence successively behind first place
Face.Then repeat the above steps, first choose the radius group in particle storehouse every time, it is random to take out one if there is remainder particulate in group
The particle of the individual group is to launching sequence；If remaining without particle in group, regenerate random number and determine new radius group.Until
Particle in grain storehouse is fully transferred to launch sequence, and last particle for being transferred to dispensing sequence occupies the end for launching sequence
Position.The order of particle is launched by first place to the last position for putting sequence.
Step 3, particle launch the division in region
Region division tentatively will entirely be launched as 2 layers, every layer is divided into 9 regions and is launched, schematic diagram such as Fig. 1 institutes
Show.
The intelligence dispensing of step 4, particle
Particle in the dispensing sequence obtained in step 2 is launched successively by the order of first place to last position.Concreting
When custom pour bottom intermediate region, therefore the selected order for launching region is upper strata after first bottom, surrounding behind first centre, that is, is pressed
The order in region 5,1,2,3,4,6,7,8,9,14,10,11,12,13,15,16,17,18 is launched.The flag for changing area is every
Individual region, which is fixed, launches 3892/18 ≈ 216, after finishing 18 regions, continues to launch remaining 4 particles in region 5.With area
Exemplified by domain 1, particle to be put is in region 1, X-direction coordinate range (0,100/3), Y direction coordinate range (0,100/
3), Z-direction coordinate range (0,100/3).First generate a random site in the range of the XYZ axles, carry out border detection and
Contact detection.Border detection is that the particle centre of sphere currently to be launched is all higher than to the distance in 6 faces front and rear up and down in region 1
Equal to the particle radius.Contact be detected as the particle currently to be launched must not have with the particle position launched before it is overlapping.Meet
Border detection and the particle of contact detection are launched successfully on the random site.Launch successful particle and remove dispensing sequence
Row.If being unsatisfactory for border detection or contact detection, random site is found again.Suitable position can not be also found more than 100 times
Put, the particle is just transferred to the last position for launching sequence, launch next particle in particle dispensing sequence.If still can not be in area
Domain 1 produces correct position, and the particle is equally postponed to the current last position for launching sequence.Until full 216 particles are thrown in region 1.
Sequence is launched in region 2 by new particle to be launched.Whole launch process is as shown in Figure 2.
Step 5, launch the analysis of regions particulate distribution situation
It is whole to launch in region except the number containing particle of region 5 220, other each region cement granules numbers are
216, as shown in table 2.Can be calculated cement granules number variation coefficient contained by each area is 0.018, calculates each particle 6um models
Interior adjacent particle number is enclosed as shown in figure 3, average out to 5, is launched looser in region.And the upper strata 10 in whole dispensing region~
There is larger remaining space in 18 regions.
The cement granules impression information of table 1
The concrete scroll information of table 2
| Zone number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Particle number | 216 | 216 | 216 | 216 | 220 | 216 | 216 | 216 | 216 |
| Zone number | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| Particle number | 216 | 216 | 216 | 216 | 216 | 216 | 216 | 216 | 216 |
Embodiment 2：
The present embodiment is the instantiation 2 of cement-based material three dimensional particles Sub-region and hierarchical put-on method, is comprised the following steps：
Consistent in step 1-3, with embodiment 1, the present embodiment and the difference of embodiment 1 are：
The intelligence dispensing of step 4, particle
Particle in the dispensing sequence obtained in step 2 is launched successively by the order of first place to last position.Particle is launched suitable
Sequence is with consistent in embodiment one, i.e., by the order in region 5,1,2,3,4,6,7,8,9,14,10,11,12,13,15,16,17,18
Launch.The mark for changing area has selected throwing is full to change again.By taking region 1 as an example, particle to be put is in region 1, X-direction coordinate range
(0,100/3), Y direction coordinate range (0,100/3), Z-direction coordinate range (0,100/3).In the range of the XYZ axles first
A random site is generated, border detection is carried out and contact detects.Border detection is the particle centre of sphere currently to be launched to region 1
The distance in 6 faces front and rear up and down be all higher than being equal to the particle radius.Contacting the particle for being detected as currently being launched must not
Have with the particle position launched before overlapping.Meet border detection and contact detection particle launched i.e. on the random site into
Work(.Launch successful particle and remove dispensing sequence.If being unsatisfactory for border detection or contact detection, random order is found again
Put.Correct position can not be also found more than 100 times, the particle is just transferred to the last position for launching sequence, particle is launched and launches sequence
Next particle in row.If still correct position can not be produced in region 1, the particle is equally postponed to current dispensing sequence
Last position.Until 3892 particles are attempted to launch in zone 1 in initiation sequence.Then sequentially in the grade region of region 2
Sequence is launched by new particle to be launched.Whole launch process is as shown in Figure 4.
Step 5, launch the analysis of regions particulate distribution situation
Contained cement granules number is as shown in table 3 in each dispensing region.All particles are complete in 1-8 region of lower floor
Complete launch finishes.The cement granules number maximum coefficient of variation contained by each area be can be calculated as 0.85.Phase in the range of each particle 6um
Adjacent particle number is as shown in figure 5, average out to 14.Launch more closely knit in region.
The concrete scroll information of table 3
| Zone number | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| Particle number | 620 | 613 | 649 | 580 | 690 | 482 | 149 | 109 | 0 |
| Zone number | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| Particle number | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Fig. 2 and Fig. 4 of comparative example 1 and embodiment 2 are it can be found that two methods are directed to the cement that the ratio of mud is 0.6
The remaining a large amount of drop spaces of system are not used, therefore this Sub-region and hierarchical put-on method is applied to the system of a large amount of particles of dispensing,
Overcoming traditional put-on method finally has the defects of less particle of radius can not find correct position.
Contrast table 2 and table 3, Fig. 3 and Fig. 5 are it can be found that Sub-region and hierarchical put-on method can be suitable with unrestricted choice dispensing region
Sequence, to simulate real concreting process.Meanwhile it different area's marks of changing are chosen during simulation can simulate different close journeys
The jettison system of degree.Demonstrate the validity and reasonability of this method.
Claims (10)
1. the layering and zoning put-on method that a kind of cement-based material particle three-dimensional is launched at random, it is characterised in that including following step
Suddenly：
Step 1: establish cement granules storehouse to be put：
Selected cement granules shape, the particle diameter distribution of cement granules to be put is obtained by laser particle size analyzer, drafts throwing
The ratio of mud for putting cement granules is w/c, dispensing region cumulative volume is v, cement density ρc, then cement granules cumulative volume is 1/ (1
+ρc(w/c))×v；And then the shape and particle diameter distribution information of cement granules are combined, determine the cement granules of every kind of different-grain diameter
Number and all cement granules total number N, generate cement granules storehouse to be put, N is positive integer；
Step 2: determine that cement granules launch sequence：
All cement granules are selected one by one at random using random number, generate a dispensing from the cement granules storehouse of step 1 generation
Sequence, i.e., it is ranked up by the order selected at random to N number of cement granules；
Step 3: particle launches the layering in region, subregion：
Whole cement granules region to be put is layered by casting concrete method in practice of construction, according to total cement
Grain number, whole region of launching is divided at least two layers with its short transverse；Each layer of dispensing region is poured by actual concrete
The order subregion built, it is multiple areas that every layer, which is launched region division,；
Step 4: launch cement granules：
The order that sequence is launched by particle in step 2 takes out cement granules dispensing divided good floor, area into step 3 successively
Dispensing area in, until launched N number of cement granules.
2. the layering and zoning put-on method that cement-based material particle three-dimensional according to claim 1 is launched at random, its feature
It is, it is spherical to draft cement granules.
3. the layering and zoning put-on method that cement-based material particle three-dimensional according to claim 2 is launched at random, its feature
It is, described to launch the cube that region is 100um*100um*100um, minimum unit is the square volumetric pixel that size is 1um,
That is cement and water occupies 106The space of individual pixel, represent (the 1+ ρ of cement number of pixels i.e. 1/c(w/c)) × 1000000, each picture
The corresponding unique three-dimensional coordinate of element.
4. the layering and zoning put-on method that cement-based material particle three-dimensional according to claim 3 is launched at random, its feature
Be, it is described dispensing cement granules when, first pour the intermediate region of bottom, be then followed by launching other regions of the layer, Ran Houhuan
Layer launches second layer intermediate region, launches successively.
5. the layering and zoning put-on method that cement-based material particle three-dimensional according to claim 4 is launched at random, its feature
Be, when carrying out cement granules dispensing, position that next particle is launched must not with when the particle position in proparea have it is overlapping, if
Have it is overlapping, just when proparea find find other nonoverlapping positions at random；It is if suitable when that can not be found at random in proparea
Placement position, Ze Huan areas are launched.
6. the layering and zoning put-on method that cement-based material particle three-dimensional according to claim 5 is launched at random, its feature
It is, the particle position to being generated at random in each area need to meet that border detection and contact detect.
7. the layering and zoning dispensing side that the cement-based material particle three-dimensional according to any one of claim 1-6 is launched at random
Method, it is characterised in that when carrying out particle dispensing, the mark for changing area's dispensing is set to particle number n, Mei Gequ that fixation is thrown in each area
The particle number of dispensing is more than n Ji Huan areas.
8. the layering and zoning put-on method that cement-based material particle three-dimensional according to claim 7 is launched at random, its feature
It is, the n can be set to the total number in N/ areas, and n is positive integer.
9. the layering and zoning put-on method that cement-based material particle three-dimensional according to claim 7 is launched at random, its feature
It is, the n is setting fixed value, and the fixed value is less than N.
10. the layering and zoning that the cement-based material particle three-dimensional according to any one of claim 1-6 is launched at random is launched
Method, it is characterised in that when carrying out particle dispensing, the mark for changing area is set to when proparea Tou Manzaihuan areas are launched, if it is current certain
The individual all particles to be put in area can not generate suitable position Ji Huan areas in the area.
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