CN106446483A - Large-current superconductor self-field finite element analysis method - Google Patents
Large-current superconductor self-field finite element analysis method Download PDFInfo
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- CN106446483A CN106446483A CN201611157315.2A CN201611157315A CN106446483A CN 106446483 A CN106446483 A CN 106446483A CN 201611157315 A CN201611157315 A CN 201611157315A CN 106446483 A CN106446483 A CN 106446483A
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- superconducting conductor
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
- G06F30/23—Design optimisation, verification or simulation using finite element methods [FEM] or finite difference methods [FDM]
Abstract
The invention provides a large-current superconductor self-field finite element analysis method. The method comprises the steps that a two-dimensional section of a superconductor is built, the finite element method is adopted for performing finite element magnetic field analyzing on the superconductor under the large-current testing condition, magnetic field distribution of the superconductor generated under the large-current operation condition is obtained, the self-field coefficient and position where the maximum magnetic field is generated on the superconductor are obtained, and therefore the appropriate magnitude of a background field for testing of the superconductor is determined and designed. Superconductor self-field analysis under the large-current testing condition is carried out by adopting the finite element method, the self-field two-dimensional distribution of the superconductor can be obtained through more accurate and visual analysis compared with an analysis method, the maximum magnetic field region of the superconductor can be obtained through visual analysis, the self-field coefficient of the conductor is determined, and therefore the reasonable magnitude of the background field for large-current testing of the superchanductor can be designed on the basis of the self-field coefficient.
Description
Technical field
The present invention relates to data simulation field, more particularly to a kind of high current superconducting conductor self-fields finite element method.
Background technology
Large-scale superconducting conductor such as CICC superconducting conductor, rd's superconducting conductor etc. work in the environment of high current and highfield
Under, superconducting conductor is very sensitive to magnetic field, when the regional area of superconducting conductor will cause the mistake of superconducting conductor more than critical magnetic field
Super.
The critical performance test of superconducting conductor is under the conditions of certain test back surface field, is energized to superconducting conductor, and test is led
The critical current of body.When superconducting conductor is under conditions of current-carrying, conductor itself can produce self-fields, and the total magnetic field size of conductor is for surveying
Examination ambient field is superimposed with self-fields, and self-fields size when therefore needing correct analysis to show that superconducting conductor is energized, so as to rationally set
Meter experiment back surface field, it is to avoid the quenching of superconducting conductor.
At present, to superconducting conductor from field analysis be size and distribution that magnetic field is calculated by way of parsing, but
The expression directly perceived of the overall distribution for the magnetic field of the two-dimensional section of superconducting conductor and self-fields maximum is not very convenient.
How to provide a kind of carry out high-current test under the conditions of the method from field analysis, accurately and intuitively can analyze
The self-fields Two dimensional Distribution of superconducting conductor and the region of maximum field on cross-sectional area of conductor is drawn, is current problem demanding prompt solution.
Content of the invention
For solving above-mentioned deficiency of the prior art, the present invention proposes a kind of high current superconducting conductor self-fields finite element fraction
Analysis method.
The technical scheme is that and be achieved in that：
A kind of high current superconducting conductor self-fields finite element method, comprises the following steps：
Step (1), sets up the two-dimensional section figure of superconducting conductor, including superconducting conductor superconducting areas and central cooling tube area
Domain；
Step (2), sets up air-shed, and air-shed includes the analyzed area of the two-dimensional section of superconducting conductor；
Step (3), arranges the material properties of analysis, and relative permeability is set to 1；
Step (4), carries out grid division to the two-dimensional section region and air-shed region of superconducting conductor；
The superconducting areas of the two-dimensional section of superconducting conductor are applied electric current density, the conductor superconducting areas on the left side by step (5)
Apply forward current density, the conductor superconducting areas on the right side apply reverse electric current density；
Step (6), defines the magnetic line of force parallel boundary condition of Finite Element Magnetic Field Analysis；
Step (7), carries out simulation analysis by Ansys software, draws the two-dimensional section of superconducting conductor under power on condition
From field distribution；
Step (8), draws the maximum field under analysis electric current by simulation analysis, by maximum field and running current
Ratio draws the size of self-fields coefficient；Magnetic field size according to contrived experiment deducts the product of running current and self-fields coefficient, from
And make the size of suitable ambient field test.
Alternatively, scope needed for the air-shed is at least two times of superconducting conductor area of section.
Alternatively, the grid division process is specially：The contour line in section, segmentation are chosen to superconducting conductor cross section
Become M decile；The boundary line of air-shed is chosen, N decile is divided into, using triangular grid structures to superconducting conductor section and sky
Gas section carries out stress and strain model.
Alternatively, the M=50, the N=50.
Alternatively, in described step (6), air-shed is chosen in air-shed distal end parallel to borderline region in the direction in magnetic field
Four contour lines, and define magnetic recording level row bound condition.
The invention has the beneficial effects as follows：
(1) pass through the superconducting conductor under the conditions of the present invention carries out high-current test using the method for finite element from field analysis,
More can accurately and intuitively analyze, than the method for parsing, the self-fields Two dimensional Distribution for drawing superconducting conductor；
(2) the maximum field region for drawing superconducting conductor can be intuitively analyzed, the self-fields coefficient of conductor is determined, so as to
The ambient field size of superconducting conductor high-current test that can be reasonable in design on this basis.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for technology description is had to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is a kind of flow chart of high current superconducting conductor self-fields finite element method of the present invention；
Fig. 2 is the two-dimensional section figure of superconducting conductor of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The present invention proposes a kind of high current superconducting conductor self-fields finite element method, by setting up the two of superconducting conductor
Dimension section, carries out external characteristic to superconducting conductor using Finite Element Method under the test condition of high current, obtains excess of export
The Distribution of Magnetic Field that conductor is produced under high current service condition, and obtain on superconducting conductor produce maximum field position with
And self-fields coefficient, so that it is determined that and design suitable superconducting conductor test ambient field size, as shown in figure 1, the present invention
Comprise the following steps that：
Step (1), sets up the two-dimensional section figure of superconducting conductor, including in superconducting conductor superconducting areas 1 and logical liquid helium
Heart cooling tube region 2, as shown in Figure 2；
Step (2), sets up air-shed 3 (as shown in Figure 2), including the analyzed area of the two-dimensional section of superconducting conductor, air
Scope needed for domain 3 is at least two times of superconducting conductor area of section；
Step (3), arranges the material properties of analysis, and relative permeability is set to 1；
Step (4), carries out grid division to the two-dimensional section region and air-shed region of superconducting conductor, it is ensured that grid is drawn
The whole and refinement of divider；Grid division process is specially：The contour line in section need to be chosen to superconducting conductor cross section, be divided into 50
Decile；The boundary line of air-shed is chosen, 50 deciles is divided into, using triangular grid structures to superconducting conductor section and air
Section carries out stress and strain model；
The superconducting areas of the two-dimensional section of superconducting conductor are applied electric current density, the conductor superconducting areas on the left side by step (5)
Apply forward current density, the conductor superconducting areas on the right side apply reverse electric current density；
Step (6), defines the magnetic line of force parallel boundary condition of Finite Element Magnetic Field Analysis；The direction in magnetic field is in air-shed distal end
Parallel to borderline region, therefore need four contour lines of air-shed are chosen, and define magnetic recording level row bound condition；
Step (7), carries out simulation analysis by Ansys software, draws the two-dimensional section of superconducting conductor under power on condition
From field distribution；
Step (8), draws the maximum field under analysis electric current by simulation analysis, by maximum field and running current
Ratio draws the size of self-fields coefficient；Magnetic field size according to contrived experiment deducts the product of running current and self-fields coefficient, from
And make the size of suitable ambient field test.
Superconducting conductor under the conditions of carrying out high-current test by the present invention using the method for finite element, can from field analysis
Method than parsing more accurately and intuitively analyzes the self-fields Two dimensional Distribution for drawing superconducting conductor, can intuitively analyze to obtain excess of export
The maximum field region of conductor, determines the self-fields coefficient of conductor, so as to superconducting conductor reasonable in design on this basis
The ambient field size of high-current test.
Presently preferred embodiments of the present invention is the foregoing is only, not in order to limit the present invention, all essences in the present invention
Within god and principle, any modification, equivalent substitution and improvement that is made etc., should be included within the scope of the present invention.
Claims (5)
1. a kind of high current superconducting conductor self-fields finite element method, it is characterised in that comprise the following steps：
Step (1), sets up the two-dimensional section figure of superconducting conductor, including superconducting conductor superconducting areas and central cooling tube region；
Step (2), sets up air-shed, and air-shed includes the analyzed area of the two-dimensional section of superconducting conductor；
Step (3), arranges the material properties of analysis, and relative permeability is set to 1；
Step (4), carries out grid division to the two-dimensional section region and air-shed region of superconducting conductor；
The superconducting areas of the two-dimensional section of superconducting conductor are applied electric current density by step (5), and the conductor superconducting areas on the left side apply
Forward current density, the conductor superconducting areas on the right side apply reverse electric current density；
Step (6), defines the magnetic line of force parallel boundary condition of Finite Element Magnetic Field Analysis；
Step (7), carries out simulation analysis by Ansys software, draw the two-dimensional section of superconducting conductor under power on condition from
Field distribution；
Step (8), draws the maximum field under analysis electric current by simulation analysis, by maximum field and the ratio of running current
Draw the size of self-fields coefficient；Magnetic field size according to contrived experiment deducts the product of running current and self-fields coefficient, from depending on
Go out the size of suitable ambient field test.
2. a kind of high current superconducting conductor self-fields finite element method as claimed in claim 1, it is characterised in that the sky
Scope needed for gas domain is at least two times of superconducting conductor area of section.
3. a kind of high current superconducting conductor self-fields finite element method as claimed in claim 1, it is characterised in that described stroke
Subnetting lattice process is specially：The contour line in section is chosen to superconducting conductor cross section, is divided into M decile；Choose air-shed
Boundary line, is divided into N decile, carries out stress and strain model using triangular grid structures to superconducting conductor section and air section.
4. a kind of high current superconducting conductor self-fields finite element method as claimed in claim 3, it is characterised in that the M
=50, the N=50.
5. a kind of high current superconducting conductor self-fields finite element method as claimed in claim 1, it is characterised in that the step
Suddenly, in (6), the direction in magnetic field is chosen four contour lines of air-shed, and defines magnetic in air-shed distal end parallel to borderline region
Parallel boundary condition.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019223368A1 (en) * | 2018-05-22 | 2019-11-28 | 深圳供电局有限公司 | Simulation model establishment method for high-temperature superconducting corc |
| CN112395735A (en) * | 2020-09-23 | 2021-02-23 | 核工业西南物理研究院 | Simulation method for current-carrying efficiency of REBCO conductor |
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| CN101702183A (en) * | 2009-11-16 | 2010-05-05 | 苏州工业园区朗润科技有限公司 | Method used for united optimization of iron shielding type superconducting magnet |
| US20160104073A1 (en) * | 2012-12-05 | 2016-04-14 | The United States Of America As Represented By The Secretary Of Commerce | Radiation Suppression of Superconducting Quantum Bits Using a Conductive Plane |
| CN105718677A (en) * | 2016-01-22 | 2016-06-29 | 中国科学院电工研究所 | Designing method for gradient coil of self-shielding superconductive nuclear magnetic resonance imaging system |
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2016
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Patent Citations (3)
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| CN101702183A (en) * | 2009-11-16 | 2010-05-05 | 苏州工业园区朗润科技有限公司 | Method used for united optimization of iron shielding type superconducting magnet |
| US20160104073A1 (en) * | 2012-12-05 | 2016-04-14 | The United States Of America As Represented By The Secretary Of Commerce | Radiation Suppression of Superconducting Quantum Bits Using a Conductive Plane |
| CN105718677A (en) * | 2016-01-22 | 2016-06-29 | 中国科学院电工研究所 | Designing method for gradient coil of self-shielding superconductive nuclear magnetic resonance imaging system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019223368A1 (en) * | 2018-05-22 | 2019-11-28 | 深圳供电局有限公司 | Simulation model establishment method for high-temperature superconducting corc |
| CN112395735A (en) * | 2020-09-23 | 2021-02-23 | 核工业西南物理研究院 | Simulation method for current-carrying efficiency of REBCO conductor |
| CN112395735B (en) * | 2020-09-23 | 2023-01-24 | 核工业西南物理研究院 | Simulation method for current-carrying efficiency of REBCO conductor |
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