Numerical Investigations on Magnetic Shielding Performance of High-Tc Superconductor
高温超导体磁屏蔽性能的数值研究
基本信息
- 批准号:11834004
- 负责人:
- 金额:$ 2.18万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:1999
- 资助国家:日本
- 起止时间:1999 至 2000
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The magnetic shielding performance of the high-Tc superconductor (HTS) has been investigated numerically. In order to reproduce the crystallographic anisotropy in the critical current density of the MPMG-YBCO superconductor, the multiple-thin-layer approximation is assumed. Under the assumption, the behavior of the shielding current density is described by the integral-differential equation and the J-E constitutive relation. As the relation, the flux-flow and flux-creep model is adopted. Futhermore, the Kim model and the Bardeen-Stephan model are employed for the description of the B-dependence of the critical current density J_C and the flow resistivity ρ_f.When discretized by means of the FEM and the θ-method, the initial-boundary-value problem of the governing equation is reduced to the nonlinear system G(s)=0. As the method for solving the system, the successive substitution method and the deaccelerated Newton method (DNM) have been employed. However, once the B-dependence of J_C and ρ_f is taken into account, it costs much CPU time to obtain the converged solutions. This is because the time step size and the relaxation factor must be taken so small to ensure the convergence. In order to overcome these difficulties, the DNM is modified so that the residual norm may decrease monotonously with respect to the iteration number. As a result, the total iteration number of the modified method is 1/230〜1/6 times as much as that of the DNM.A numerical code for analyzing the time evolution of the shielding current density has been developed by use of the modified method and, by use of the code, the magnetic shielding performance of the HIS plate is investigated. From the results of computations, it turns out that the HTS plate has a shielding ability against high-frequency magnetic fields even if it remains in a mixed state.
对高温超导体的磁屏蔽性能进行了数值研究。为了再现MPMG-YBCO超导体临界电流密度的晶体学各向异性,采用了多薄层近似。在此假设下,屏蔽电流密度的行为由积分微分方程和J-E本构关系描述。作为联系,采用磁通流和磁通蠕动模型。本文采用Fuelman模型、Kim模型和Bardeen-Stephan模型来描述临界电流密度J_C和流动电阻率ρ_f的B-依赖关系,用有限元法和θ-方法离散时,控制方程的初边值问题化为非线性系统G(s)=0。作为求解该系统的方法,采用了逐次替换法和减速牛顿法(DNM)。然而,一旦考虑J_C和ρ_f的B-依赖性,则要获得收敛解需要花费大量的CPU时间。这是因为时间步长和松弛因子必须取得如此小以确保收敛。为了克服这些困难,对DNM进行了修改,使得残差范数可以相对于迭代次数单调减少。结果表明,该方法的总迭代次数是DNM的1/230 ~ 1/6。利用该方法编制了屏蔽电流密度随时间演化的数值分析程序,并对HIS板的磁屏蔽性能进行了研究。计算结果表明,高温超导板即使处于混合状态,也具有对高频磁场的屏蔽能力。
项目成果
期刊论文数量(32)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
A.Kamitani: "Influence of Magnetic-Field Dependence of JC and rf on Magnetic Shielding Performance of HTS Plates"Advances in Superconductivity. 12. 869-871 (2000)
A.Kamitani:“JC 和 rf 的磁场依赖性对 HTS 板磁屏蔽性能的影响”超导进展。
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S.Ikuno: "Numerical Solution for Hybrid of Homogeneous and Inhomogeneous Linear Elliptic PDEs-Application of Combination Method of FDM and BEM- "NIFS-PROC. 40. 72-81 (1999)
S.Ikuno:“齐次和非齐次线性椭圆偏微分方程的混合数值解-FDM和BEM组合方法的应用-”NIFS-PROC。
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A.Kamitani : "Magnetic Shielding Analysis of HTS Plates by Flux Flow Creep Model"Advances in Superconductivity. 11. 1455-1458 (1999)
A.Kamitani:“通过磁通流蠕变模型对 HTS 板进行磁屏蔽分析”超导性的进展。
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T.Yokono: "Dependence of Spatial Distribution of Shielding Current Density in HTS Plate on Applied Magnetic Field Profile"IEEE Tran.Appl.Superconductivity. (In Press). (2001)
T.Yokono:“HTS 板中屏蔽电流密度的空间分布对应用磁场分布的依赖性”IEEE Tran.Appl.Superconductivity。
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- 影响因子:0
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Atsushi Kamitani: "Magnetic Shielding Analysis of Axisymmetric HTS Plate by Flux Flow Creep Model"IEEE Tran. Appl. Superconductivity. Vol.9,No.2. 3050-3053 (1999)
Atsushi Kamitani:“通过磁通流蠕变模型对轴对称高温超导板进行磁屏蔽分析”IEEE Tran。
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KAMITANI Atsushi其他文献
可変速ディーゼル発電システムを用いた小規模電力系統における風力発電由来の周波数変動抑制法
使用变速柴油发电系统抑制小型电力系统中风力发电引起的频率波动的方法
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2020 - 期刊:
- 影响因子:0
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KAMITANI Atsushi;TAKAYAMA Teruou;SAITOH Ayumu;NAKAMURA Hiroaki;高橋理音,梅村敦史,田村淳二 - 通讯作者:
高橋理音,梅村敦史,田村淳二
Acceleration Techniques for Linear-System Solver in Shielding Current Analysis of Cracked HTS Film
裂纹高温超导薄膜屏蔽电流分析中线性系统求解器的加速技术
- DOI:
10.1585/pfr.16.2405005 - 发表时间:
2021 - 期刊:
- 影响因子:0.8
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KAMITANI Atsushi;TAKAYAMA Teruou;SAITOH Ayumu;NAKAMURA Hiroaki - 通讯作者:
NAKAMURA Hiroaki
Improved Variable-Reduction Method and Its Variant for Solving Asymmetric EFG-Type Saddle-Point Problem
求解非对称EFG型鞍点问题的改进变量归约法及其变体
- DOI:
- 发表时间:
2023 - 期刊:
- 影响因子:0.8
- 作者:
KAMITANI Atsushi;TAKAYAMA Teruou - 通讯作者:
TAKAYAMA Teruou
輻射輸送を考慮したSF6アークプラズマの3次元数値解析
考虑辐射输运的SF6电弧等离子体三维数值分析
- DOI:
- 发表时间:
2023 - 期刊:
- 影响因子:0
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KAMITANI Atsushi;TAKAYAMA Teruou;SAITOH Ayumu;NAKAMURA Hiroaki;信木 慎・平山智士・乾 義尚 - 通讯作者:
信木 慎・平山智士・乾 義尚
低慣性電力系統における仮想同期発電機の出力制御方式の検討
低惯量电力系统虚拟同步发电机输出控制方法研究
- DOI:
- 发表时间:
2021 - 期刊:
- 影响因子:0
- 作者:
KAMITANI Atsushi;TAKAYAMA Teruou;SAITOH Ayumu;NAKAMURA Hiroaki;西谷壽祥,Thongchart Kerdphol,渡邊政幸,三谷康範 - 通讯作者:
西谷壽祥,Thongchart Kerdphol,渡邊政幸,三谷康範
KAMITANI Atsushi的其他文献
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{{ truncateString('KAMITANI Atsushi', 18)}}的其他基金
High-Performance Computational Techniques for Practical Electromagnetic-Field Analysis in High-Temperature Superconductor
高温超导体实用电磁场分析的高性能计算技术
- 批准号:
24560321 - 财政年份:2012
- 资助金额:
$ 2.18万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Development of High-Performance Electromagnetic Analysis for Design of Engineering Application of High-Temperature Superconductor
高温超导体工程应用设计高性能电磁分析的发展
- 批准号:
21560287 - 财政年份:2009
- 资助金额:
$ 2.18万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Development of Fast Numerical Methods for Electromagnetic Analysis in High-Temperature Superconductors
高温超导体电磁分析快速数值方法的发展
- 批准号:
19560276 - 财政年份:2007
- 资助金额:
$ 2.18万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Time-Evolution Simulation of Shielding Current Density in High-Temperature Superconductor
高温超导体屏蔽电流密度的时间演化模拟
- 批准号:
17560245 - 财政年份:2005
- 资助金额:
$ 2.18万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Numerical Simulation of Shielding Current Density in High-Temperature Superconductor by Parallel Processing on PC Cluster
PC集群并行处理高温超导体屏蔽电流密度数值模拟
- 批准号:
15607001 - 财政年份:2003
- 资助金额:
$ 2.18万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
Time Domain Analysis on Magnetic Shielding Performance of YBCO Superconductor
YBCO超导体磁屏蔽性能时域分析
- 批准号:
13650297 - 财政年份:2001
- 资助金额:
$ 2.18万 - 项目类别:
Grant-in-Aid for Scientific Research (C)
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