CN104361215B - A kind of Monte Carlo based on label information fusion reactor repetitive structure processing method - Google Patents
A kind of Monte Carlo based on label information fusion reactor repetitive structure processing method Download PDFInfo
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Abstract
The invention discloses a kind of Monte Carlo based on label information fusion reactor repetitive structure processing method, comprise the steps of: obtain input data；Build the tree-like structural relation of geometry according to input data, only store the corresponding relation of basic model and duplication model therewith, counting region transforms at basic model and stores this pattern number and the transformation relation i.e. label information of counting region；Particle is transformed to the label information of the transformation relation carrying out transporting and store this pattern number and go through in basic model, i.e. particle by PARTICLE TRANSPORT FROM in following the tracks of；Subsequent counter is carried out again when the label information of particle and the label information of counting region are consistent.The present invention truly reflects locus and the direction of particle, improves the true and reliable property of result, reduces unnecessary memory cost, to improve computational efficiency, can be widely applied to the field such as reactor physics, Neutronics analysis.
Description
Technical field
The present invention relates to a kind of Monte Carlo based on label information fusion reactor repetitive structure processing method, belong to reactor
Physics, neutronics technical field of information processing.
Background technology
During reacter phyics design with analysis, it is basis and core content that radiation transport calculates.Radiation transport meter
Calculating and mainly have analytic method and DSMC two kinds, analytic method is distributed the problem tool of comparison rule for geometry and material
There is the advantage of quick and high computational accuracy, but maybe cannot solve relatively greatly for complicated problem error；DSMC is one
The method planting probability statistics, carrys out the macroscopic statistics characteristic of descriptive system with the behavior of the almost each particle of approaching to reality simulation,
Do not limited by problem geometry and material, all can be kept degree of precision in all regions, but to calculate the time as cost.Along with closely
The developing rapidly of computer technology over Nian, DSMC is increasingly widely used in reactor physics, Neutronics analysis etc.
Aspect.
Particularly extensive actual response heap problem simulation, the problem of calculator memory in reactor Monte Carlo simulation
Become one of challenge of maximum in currently practical application.For fusion reactor neutronics calculation and analysis, due to itself base
This geometric units structure is complicated and is limited by computer single node internal memory, but its geometry and material are distributed to have and compare
Good symmetry and repeatability, therefore in actual application to use fan-shaped model (such as 40 °) to add border reflecting surface (direct reflection, unrestrained more
Reflection etc.) mode carry out computational analysis, owing to it is symmetrical with repeatability, carry out replicating i.e. can get full model with this model.
For the method, as shown in Fig. 1 rough schematic view, region A is identical with region B geometry material, and material is reduced to very
Sky, represents the track of particle with the line segment of band arrow, and wherein figure (a) represents real particles track, owing to passing through counting without particle
Region, is zero as carried out flux estimation result, but uses the method, uses region A to represent region B, when particle enters region B
Use reflecting surface to be offset by particle trajectory, then can count on reality for the statistics of counting region and not enter this counting
The particle in region.From the angle of a large amount of particle statistics, result not necessarily can be caused the biggest deviation by the defect in the method, but
Do not meet the situation that particle is truly simulated.
Simultaneously inside fusion reactor sector model, there are the parts that the identical relative position of geometry is different, a kind of basic
And the most frequently used geometric description is the method for repetitive structure with processing mode, on the one hand provide the user with a kind of simple efficient weight
Complex structure geometric ways describes the geometry of Whole core, on the other hand, owing to solid substantial amounts of in repetitive structure and geometry are retouched
State mode the most quite similar, therefore use special storage mode can reduce program this repetitive structure and internal memory is taken.
Additionally, utilize the geometrical property of repetitive structure, can look into for the particle localization during calculating, solid based on this describing mode
The process such as look for be optimized and then to realize speed-up computation, as used Los Alamos National Laboratories of the U.S. widely to open
The MCNP sent out, uses interlayer accelerated method based on user's input information, i.e. uses territory number when specifying the level of certain lattice cell
(No. Universe) represents that the border of the border discord higher of this lattice cell is intersected, and can terminate boundary face in advance when making a look up
Lookup with realize accelerate.This processing mode the most simply simplifies geometry storage, but in stationary source with CRITICAL CALCULATION, grain
Son follow the tracks of, count and fission source particles storage time still geometry is launched, particle often walk the meter that track, this step are corresponding
Number, generation and the storage of source particles of fissioning in CRITICAL CALCULATION are required for determining positional information and residing lattice cell, therefore exist big
Amount particle and the Coordinate Conversion of counting region.
Summary of the invention
The technology of the present invention solves problem: overcome the deficiencies in the prior art, it is provided that a kind of Monte Carlo based on label information
Fusion reactor repetitive structure processing method, for fusion reactor core, can reflect particle realistic simulation situation more realistically, and result is more
Add accurately and reliably, unnecessary Coordinate Conversion can be reduced in a large number simultaneously for traditional repetitive structure part, improve and calculate speed
Degree.Additionally, the present invention truly reflects locus and the direction of particle, improving the true and reliable property of result, it is unnecessary to reduce
Memory cost, improves computational efficiency.
The technical solution adopted in the present invention is accomplished by the invention discloses a kind of Monte Carlo based on label information
Fusion reactor repetitive structure processing method, comprises the steps of: obtain input data；Geometry is built according to input data
Tree structure relation, only stores the corresponding relation of basic model and duplication model therewith, is transformed to substantially counting region
Model at and store this pattern number and the transformation relation i.e. label information of counting region；Particle is become in following the tracks of by PARTICLE TRANSPORT FROM
Change to the transformation relation carrying out transporting and store this pattern number and go through in basic model, the i.e. label information of particle；When
Subsequent counter is carried out again when the label information of particle is consistent with the label information of counting region.
As it is shown on figure 3, a kind of Monte Carlo based on label information of present invention fusion reactor repetitive structure processing method, comprise
Following steps:
Step (1) obtains input data, and described input parameter comprises the geological information of fusion reactor, material information, source
Information and count information, wherein:
Described geological information refers to geometry entity description, repetitive structure and the constitutional repeating unit comprising constitutional repeating unit
Corresponding relation, non-duplicate structure division geometry entity describe, the interlayer relation of geometry entity and combinations thereof；Described repetitive structure
Unit R1、R2... represent different types of constitutional repeating unit, use R1→1、R1→ 2 ... represent and R1There is identical geometry
With material structure region relative to R1Corresponding relation, use F1、F2... represent non-duplicate construction geometry；
Described material information refers to the nucleic composition of the material filled in geometry, and the various reaction cross-sections of every kind of nucleic
Data；
Described source information refers to the kind of source particles, space, energy, directional spreding；
Described count information refers to need the counting type of Computational Physics amount, counting region, counting power spectrum, calculating scale；
Step (2) builds the tree-like structural relation of geometry stored count region mark according to the input parameter of calculation procedure (1)
Note information, is implemented as follows:
Building and store geometry tree structure as shown in Figure 2, tree structure represents the interlayer relation of geometric units, i.e. certain
The solid that the solid that one node represents is represented by its child node forms, storage entity geometry and right in this tree structure
Should be related to；
Starting to search for the counting region of all inputs according to this geometry tree structure from root node, counting region increases labelling
Information: the constitutional repeating unit corresponding to lattice cell (the most single solid) at this place, region is numbered and from root node to this region
Node all repetitive structures corresponding relation at place, and counting region is corresponding according to all repetitive structure corresponding relations of storage
On constitutional repeating unit, if there is no repetitive structure corresponding relation in search procedure, label information is empty, it is not necessary to sit
Mark conversion；
Step (3) PARTICLE TRANSPORT FROM based on label information is followed the tracks of, and implementing step is:
Particle carries out locating and tracking, relative to according to the geometry tree structure constructed by step (2) in transport process
Some Monte Carlos PARTICLE TRANSPORT FROM tracking, increase label information in the track information of particle: the grid that particle is currently located
Constitutional repeating unit numbering R corresponding to unitnAnd close from root node to the node being currently located lattice cell all repetitive structures correspondence
System, is wherein currently located lattice cell and RnCorresponding relation Rn→ i represents, wherein the sequence number in n with i corresponding geometry tree structure；
The particle each step during following the tracks of needs the lattice cell judging to be currently located and carries out geometry fortune with place lattice cell
Calculating and judge, particle relies on the interlayer relation of geometry in geometry tree structure, judges with the method for backtracking and traversal child node
Next step residing lattice cell position, when entering into the node of storage repetitive structure corresponding relation, first believes in this particle track
Breath stores constitutional repeating unit numbering R corresponding to the lattice cell being currently locatednAnd and RnCorresponding relation, be labeled as Rn→ i,
Again by particle according to corresponding relation Rn→ i carries out particle position, direction transformation at constitutional repeating unit RnAccording to Monte Carlo
PARTICLE TRANSPORT FROM flow process carries out transporting calculating, if having repetitive structure and corresponding relation thereof in the child node of this node, but when particle goes out
When storing the node of repetitive structure corresponding relation, by particle according to corresponding relation Rn→ i carries out the inversion in particle position, direction
Change, to be adjusted to the state of the constitutional repeating unit corresponding relative to present node；
If carrying out CRITICAL CALCULATION, in this generation, is depended in the position producing follow-on fission source particles during being iterated
In the sampling of actual collision point during PARTICLE TRANSPORT FROM, relative to existing Monte Carlo PARTICLE TRANSPORT FROM tracking, of future generation
Fission source particles inherits the label information producing this particle when storage, follow-up carries out repeatedly according to Monte Carlo PARTICLE TRANSPORT FROM flow process
In generation, calculates；
Counting based on label information during step (4) tracking, specific as follows:
The tracking of particle and counting region have been transformed into the lattice cell of actual storage based on step (2), (3), and store right
The label information answered is so that judging and recovering home position, direction, and particle counting during following the tracks of, relative to existing
Monte Carlo PARTICLE TRANSPORT FROM tracking, contrasted particle track and counting region phase before each timing point counts the most successively
The label information that should store, the constitutional repeating unit corresponding to the lattice cell being i.e. currently located is numbered and from root node to being currently located
Node all repetitive structures corresponding relation of lattice cell, if particle track particle consistent with the label information of counting region respective stored
It is possible to be actually reached this counting lattice cell and then carry out subsequent counter statistics, and particle and the relative direction of this counting lattice cell and position
Putting is i.e. the situation after converting, and therefore need not carry out coordinate transform again and directly counts according to Monte Carlo PARTICLE TRANSPORT FROM flow process
Number.
It is an advantage of the current invention that:
(1) carry out Particle tracking based on particle label information, use fan-shaped model relative to traditional fusion reactor and add anti-
Penetrate the processing method in face, the method store faithfully and reflect the real locus of particle and be prone to recover particle truly sit
Mark, improves the reliability of result；Storage only stores essential information, including: constitutional repeating unit geometry, non-duplicate structure
Geometry, particle are relative to track, and true geometric structure and particle track are relative to the relativeness of these essential informations, reduce
Memory cost；Have only to when particle into or out repetitive structure node carry out particle coordinate conversion and label information updates, not
Need particle is often walked and all carry out coordinate transform, improve and calculate speed；
(2) result statistics is carried out based on counting region label information, owing to being entered by the label information of particle and counting region
Go separation, be first directly marked the comparison of information before counting and unorthodox method carries out the phase para-position of particle and counting region
Putting conversion, the information that is marked is relatively rear to be counted as both couplings just carry out next step, now particle and the conversion of counting region
Relation i.e. relative direction and position always is i.e. this particle and the essential information of counting region storage, it is not necessary to carry out coordinate change again
Changing and directly carry out counting according to general method, the method simplifies calculating process and improves computational efficiency.
Accompanying drawing explanation
Fig. 1 is fusion reactor reflecting surface processing method schematic diagram；
Fig. 2 is the tree-like structural representation of geometry；
Fig. 3 is the flow chart of steps of the present invention；
Fig. 4 is that International Thermal-Nuclear Experimental Reactor benchmark example part lattice cell flux calculates schematic diagram；
Fig. 5 is the International Thermal-Nuclear Experimental Reactor benchmark tree-like structural representation of example geometry.
Detailed description of the invention
The present invention as a example by the part lattice cell flux of disclosed International Thermonuclear heap experimental reactor ITER benchmark example calculates,
Illustrate that the present invention's is embodied as step.This benchmark example model is complicated, and 360 ° of full models comprise nearly ten thousand lattice cells, common PC
Machine is limited by internal memory and actual cannot be calculated, and the method that 40 ° of fan-shaped models can only be used to add reflecting surface is only given in the present invention
The signal that this example part lattice cell flux calculates, as shown in Figure 4, the Computing Principle of complete model is identical, 360 ° of full models
It is the duplication arrangement of the 40 ° of fan-shaped models in the right, different 40 ° of model inner bulk A only positions just the same with body B, body A ' and body
B ' and body A, body B are corresponding, but are in next 40 ° of fan-shaped models.The present invention is used to be embodied as step as follows:
Step (1), obtain input data, comprise following content:
Geological information: definition constitutional repeating unit, uses R1Represent 40 ° of fan-shaped models, R of Fig. 4 rightmost side2Represent body A, then
In 360 ° of full models, 320 ° of model parts are expressed as R1→1、R1→2……R1→ 8, body B is expressed as R20 ° of fan-shaped model of → Isosorbide-5-Nitrae
In in addition to body A, body B remainder F1Represent, and to R1、R2、F1The interlayer carrying out geometry entity and geometry entity combination closes
System is described；
Material information: corresponding R1、R2、F1Material species composition, and storehouse, the various reaction cross-section number corresponding to nucleic
According to；
Source information: the kind of source particles is neutron, carry out space according to model plasma, Energy distribution, direction are every
The same sex；
Count information: body B and body B ' 2 the counting body flux of lattice cell, the calculating scale in figure of calculating is 108Individual particle；
Step (2), build the tree-like structural relation of geometry stored count zone marker information according to input data:
Build and store geometry tree structure as shown in Figure 5；
Starting to search for the counting region of all inputs according to this geometry tree structure from root node, increasing counting region increases
Label information: the constitutional repeating unit corresponding to the lattice cell at this place, region is numbered and from root node to the node at this place, region
All repetitive structure corresponding relations, then body B stores numbering R2And corresponding relation R2→ 1, body B ' store numbering R2And corresponding relation R1
→1、R2→ 1, then counting region is corresponded on constitutional repeating unit according to all repetitive structure corresponding relations of storage, then body
B and body B ' all reference numerals are R2Lattice cell, i.e. body A；
Step (3), PARTICLE TRANSPORT FROM based on label information are followed the tracks of:
Particle carries out locating and tracking according to the geometry tree structure constructed by step (2) in transport process, follows the tracks of process
Increase label information in the track information of middle particle: constitutional repeating unit numbering R corresponding to the lattice cell that particle is currently locatednAnd
From root node to the node being currently located lattice cell all repetitive structures corresponding relation.The particle each step during following the tracks of needs
Judging the lattice cell being currently located and carry out geometric operation and judgement with place lattice cell, particle relies on geometry in geometry tree structure
Interlayer relation, with backtracking and traversal child node method judge next step residing lattice cell position, when enter into storage repeat
During the node of structure corresponding relation, first in this particle track information, store the repetitive structure corresponding to the lattice cell being currently located
Element number RnAnd and RnWhen corresponding relation Rn→ i, then by particle according to corresponding relation Rn→ i carries out particle position, direction becomes
Change and at constitutional repeating unit RnIn carry out transporting calculating according to general flow process, have repetitive structure as in the child node of this node
And corresponding relation, recurrence is carried out the most according to the method described above, but when particle goes out to store the node of repetitive structure corresponding relation, will
Particle is according to corresponding relation Rn→ i carries out the inverse transformation in particle position, direction, to be adjusted to the weight corresponding relative to present node
The state of complex structure unit.
If particle is from first 40 ° of fan-shaped model area, arrive next 40 ° of fan-shaped models from A face, enter back into body
B ', then numbering R in primary label information1, corresponding relation be empty.When passing through the next 40 ° of fan-shaped models of arrival, particle mark
Numbered R in note information1, corresponding relation be R1→ 1, and by particle according to corresponding relation R1→ 1 carries out coordinate transform moves to
On the B face of one fan-shaped model.Particle enters body B ', stores numbering R in particle label information2And corresponding relation R1→1、R2→
1, and by particle according to corresponding relation R2→ 1 carries out coordinate transform again moves to R2Corresponding position.
Counting based on label information during step (4), tracking:
Based on step (2), (3), the tracking of particle and counting region are transformed into first 40 ° of sector region or body A
In, and store the label information of correspondence so that judging and recovering home position, direction, particle counting during following the tracks of,
Particle track and the label information of counting region respective stored was contrasted the most successively, for calculating before each timing point counts
The body flux of body B, the most first judges whether number in the label information of particle is R2, whether corresponding relation is R2→ 1, if unanimously
Add up flux by follow-up conventional method again, for calculating the body flux of body B ', the most first judge that in the label information of particle, numbering is
No for R2, corresponding relation whether R1→1、R2→ 1, add up flux by follow-up conventional method again if consistent；
In a word, the present invention is by dividing whole geometric space according to symmetrical relations, based on label information with by grain
Son and its actual place geometry and counting region thereof carry out relationship map, improved and update during particle entry/exit geometrical boundary
Mapping relations, only transport calculating simulation what a geometric space carried out particle, first carry out mapping relations when counting and sentence
Disconnected, more can guarantee that analog result accurately and reliably while saving internal memory, in principle with 360 ° of full model result of calculations keep
Completely the same, reduce substantial amounts of Coordinate Conversion in traditional repetitive structure simultaneously, improve and calculate speed.
What the present invention did not elaborated partly belongs to techniques well known.
Although detailed description of the invention illustrative to the present invention is described above, in order to the technology people of this technology neck
Member understands the present invention, it should be apparent that the invention is not restricted to the scope of detailed description of the invention, and the ordinary skill to the art
From the point of view of personnel, as long as various change limits and in the spirit and scope of the present invention that determine, these become in appended claim
Change is apparent from, and all utilize the innovation and creation of present inventive concept all at the row of protection.
Claims (1)
1. Monte Carlo based on a label information fusion reactor repetitive structure processing method, it is characterised in that comprise following step
Rapid:
Step (1) obtains input data, and described input parameter comprises the geological information of fusion reactor, material information, source information
And count information, wherein:
The geometry entity that described geological information refers to comprise constitutional repeating unit describes, repetitive structure is right with constitutional repeating unit
Should be related to, non-duplicate structure division geometry entity describes, the interlayer relation of geometry entity and combinations thereof；Described constitutional repeating unit
Use R1、R2... represent different types of constitutional repeating unit, use R1→1、R1→ 2 ... represent and R1There is identical geometry and material
Material structural region is relative to R1Corresponding relation, use F1、F2... represent non-duplicate construction geometry；
Described material information refers to the nucleic composition of the material filled in geometry, and the various reaction cross-sections number of every kind of nucleic
According to；
Described source information refers to the kind of source particles, space, energy, directional spreding；
Described count information refers to need the counting type of Computational Physics amount, counting region, counting power spectrum, calculating scale；
Step (2) builds the tree-like structural relation of geometry stored count zone marker letter according to the input parameter of calculation procedure (1)
Breath, is implemented as follows:
(21) the structure tree-like structural relation of geometry is in order to represent the interlayer relation of geometric units, the solid that the most a certain node represents
The solid represented by its child node forms, storage entity geometry and corresponding relation in this tree structure；
(22) starting to search for the counting region of all inputs according to this geometry tree structure from root node, counting region increases labelling
Information: the numbering of the constitutional repeating unit corresponding to the most single solid of lattice cell at this place, region, and from root node to this region
Node all repetitive structures corresponding relation at place, and counting region is corresponding according to all repetitive structure corresponding relations of storage
On constitutional repeating unit, if there is no repetitive structure corresponding relation in search procedure, label information is empty, it is not necessary to sit
Mark conversion；
Step (3) PARTICLE TRANSPORT FROM based on label information is followed the tracks of, and implementing step is:
(31) particle carries out locating and tracking, relative to according to the geometry tree structure constructed by step (2) in transport process
Some Monte Carlos PARTICLE TRANSPORT FROM tracking, increase label information in the track information of particle: the grid that particle is currently located
Constitutional repeating unit numbering R corresponding to unitnAnd close from root node to the node being currently located lattice cell all repetitive structures correspondence
System, is wherein currently located lattice cell and RnCorresponding relation Rn→ i represents, wherein the sequence number in n with i corresponding geometry tree structure；
(32) particle each step during following the tracks of needs the lattice cell judging to be currently located and carries out geometry fortune with place lattice cell
Calculating and judge, particle relies on the interlayer relation of geometry in geometry tree structure, judges with the method for backtracking and traversal child node
Next step residing lattice cell position, when entering into the node of storage repetitive structure corresponding relation, first believes in this particle track
Breath stores constitutional repeating unit numbering R corresponding to the lattice cell being currently locatedN,And and RnCorresponding relation, be labeled as Rn→ i,
Again by particle according to corresponding relation Rn→ i carries out particle position, direction transformation at constitutional repeating unit RnAccording to Monte Carlo
PARTICLE TRANSPORT FROM flow process carries out transporting calculating, if having repetitive structure and corresponding relation thereof in the child node of this node, but when particle goes out
When storing the node of repetitive structure corresponding relation, by particle according to corresponding relation Rn→ i carries out the inversion in particle position, direction
Change, to be adjusted to the state of the constitutional repeating unit corresponding relative to present node；
If carrying out CRITICAL CALCULATION, this generation particle is depended in the position producing follow-on fission source particles during being iterated
In the sampling of actual collision point in transport process, relative to existing Monte Carlo PARTICLE TRANSPORT FROM tracking, fission of future generation
Source particles storage time inherit produce this particle label information, follow-up according to Monte Carlo PARTICLE TRANSPORT FROM flow process be iterated meter
Calculate；
Counting based on label information during step (4) tracking, specific as follows:
The tracking of particle and counting region are transformed into based on step (2), (3) lattice cell of actual storage, and have stored correspondence
Label information is so that judging and recovering home position, direction, and particle counting during following the tracks of, relative to existing illiteracy spy
Caro PARTICLE TRANSPORT FROM tracking, before each timing point counts, contrast particle track and counting region are deposited accordingly the most successively
The label information of storage, the constitutional repeating unit corresponding to the lattice cell being i.e. currently located is numbered and from root node to being currently located lattice cell
Node all repetitive structures corresponding relation, if particle track particle consistent with the label information of counting region respective stored just has
This counting lattice cell may be actually reached and then carry out subsequent counter statistics, and particle and the relative direction of this counting lattice cell and position are i.e.
It is the situation after conversion, therefore need not carry out coordinate transform again and directly carry out counting i.e. according to Monte Carlo PARTICLE TRANSPORT FROM flow process
Can.
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| CN103065018A (en) * | 2013-01-13 | 2013-04-24 | 中国科学院合肥物质科学研究院 | Reverse Monte Carlo particle transporting and simulating system |
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