Time Domain Analysis on Magnetic Shielding Performance of YBCO Superconductor

YBCO超导体磁屏蔽性能时域分析

基本信息

  • 批准号:
    13650297
  • 负责人:
  • 金额:
    $ 2.24万
  • 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:
    2001
  • 资助国家:
    日本
  • 起止时间:
    2001 至 2002
  • 项目状态:
    已结题

项目摘要

Among the industrial applications of the high-Tc superconductor (HTS), the magnetic levitation and the magnetic shielding have recently become promising. Since the quantitative evaluation of the shielding current density is indispensable for the development of the magnetic levitation system and the magnetic shielding apparatus, the various methods have been so far proposed for calculating the time evolution of the shielding current density. However, in all of the methods, the finite element method (FEM) has been employed for the discretization of the governing equations.In spite of the quite convenience, the FEM has been plagued by two inherent difficulties. First of all, the region has to be divided into a set of finite elements before using the FEM program. In general, the element generation is even more time-consuming than the assembly and the solution of the finite element equations. Second, the solution obtained by the FEM has a limitation in its smoothness. Even if the solution i … More s continuous, its derivative might be discontinuous across the element boundary. In the numerical simulation of the shielding current density, such a limited regularity of the solution leads to the discontinuous electric fields.In order to resolve the above difficulties, several meshless approaches have been proposed : the DE method, the EFG method and the MLPG method. Since the finite elements of a geometrical structure are no longer necessary for all of the methods, the data preparation is significantly simplified.By using the element-free Galerkin method, we have developed the 3D code to integrate the governing equations of the shielding current density in the HTS plate. After calculating the time evolution of the shielding current density by use of the code, we have performed the spectral analysis of the magnetic flux density. Conclusions obtained in the present study are summarized as follows :1) For the case where the B-dependence of the flow resistivity and the critical current density is taken into account, the third harmonics of the magnetic flux density are rapidly excited with an increase in the amplitude of the applied ac magnetic field.2) For the case where their B-dependence is neglected, an increase in the applied magnetic flux density will weaken the third harmonics.From the above results, we might conclude that the rapid growth of the third harmonics is closely related to the B-dependence of the flow resistivity and the critical current density. Less
在高温超导体(HTS)的工业应用中,磁悬浮和磁屏蔽是近年来最有前途的两个方面。由于屏蔽电流密度的定量评估对于磁悬浮系统和磁屏蔽设备的发展是必不可少的,因此迄今为止已经提出了各种方法来计算屏蔽电流密度的时间演变。然而,在所有的方法中,有限元法(FEM)一直被用于离散的控制方程,尽管相当方便,有限元法一直困扰着两个固有的困难。首先,在使用有限元程序之前,必须将区域划分为一组有限元单元。一般来说,单元生成甚至比有限元方程的装配和求解更耗时。其次,有限元法得到的解在光滑性方面有一定的局限性。即使解决方案是 ...更多信息 的连续性,其导数在单元边界上可能是不连续的。在屏蔽电流密度的数值模拟中,由于这种有限的正则性,导致了电场的不连续,为了解决上述问题,人们提出了几种无网格方法:DE法、EFG法和MLPG法。由于所有方法不再需要几何结构的有限元,因此数据准备工作大大简化,通过使用无单元Galerkin方法,我们开发了三维代码来集成HTS板中屏蔽电流密度的控制方程。利用该程序计算了屏蔽电流密度随时间的变化规律,并对磁场强度进行了频谱分析。结果表明:(1)在考虑流阻和临界电流密度的B依赖性的情况下,随着外加磁场幅值的增大,磁通密度的三次谐波被迅速激发;(2)在不考虑流阻和临界电流密度的B依赖性的情况下,外加磁场的增大会削弱三次谐波,由此可以得出结论:三次谐波的快速增长与流阻和临界电流密度的B依赖性密切相关。少

项目成果

期刊论文数量(38)
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 B-Dependence of Critical Current Density on Magnetic Shielding Performance of MPMG-YBCO Plate"IEEETran. Appl. Superconductivity. 11. 2256-2259 (2001)
A.Kamitani:“临界电流密度的 B 依赖性对 MPMG-YBCO 板磁屏蔽性能的影响”IEEETran。
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    0
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A. Kamitani, K. Hasegawa, and T. Yokono: "Spectral Analysis of Magnetic Fields Generated by Shielding Current Density in HTS"IEEE Trans. Magn.. Vol.39 (to be published).
A. Kamitani、K. Hasekawa 和 T. Yokono:“高温超导中屏蔽电流密度产生的磁场的频谱分析”​​IEEE Trans。
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    0
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A.Kamitani: "Influence of B-Dependence of Critical Current Density on Magnetic Shielding Performance of MPMG-YBCO Plate"IEEE Tran.Appl.Superconductivity. Vol.11,No.1. 2236-2339 (2001)
A.Kamitani:“临界电流密度的 B 依赖性对 MPMG-YBCO 板磁屏蔽性能的影响”IEEE Tran.Appl.超导。
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    0
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T. Yokono, K. Hasegawa and A. Kamitani: "Dependence of Spatial Distribution of Shielding Current Density in HTS Plate on Applied Magnetic Field Profile"IEEE Tran. Appl. Superconductivity. Vol.11,No.1. 2236-2239 (2001)
T. Yokono、K. Hasekawa 和 A. Kamitani:“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。
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T. Yokono, K. Hasegawa and A. Kamitani: "Numerical Investigation on Phase Difference between Shielding Current Density and Applied Magnetic Field"Physica C. Vol.357. 755-758 (2001)
T. Yokono、K. Hasekawa 和 A. Kamitani:“屏蔽电流密度与应用磁场之间相位差的数值研究”Physica C. Vol.357。
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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
  • DOI:
  • 发表时间:
    2020
  • 期刊:
  • 影响因子:
    0
  • 作者:
    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
  • 作者:
    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
  • 作者:
    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:
    $ 2.24万
  • 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:
    $ 2.24万
  • 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:
    $ 2.24万
  • 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:
    $ 2.24万
  • 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:
    $ 2.24万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)
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
  • 批准号:
    11834004
  • 财政年份:
    1999
  • 资助金额:
    $ 2.24万
  • 项目类别:
    Grant-in-Aid for Scientific Research (C)

相似海外基金

Caractérisation expérimentale de rubans supraconducteurs en régime de "flux flow"
鲁班超导体在“磁通流”制度下的表征实验
  • 批准号:
    495216-2016
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Caractérisation expérimentale de rubans supraconducteurs en régime de "flux flow"
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  • 批准号:
    481471-2015
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    2015
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Nodal structure of unconventional superconductors probed by flux-flow transport measurements
通过通量流输运测量探测非常规超导体的节点结构
  • 批准号:
    25400383
  • 财政年份:
    2013
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    Grant-in-Aid for Scientific Research (C)
RUI: Core Size Effects on Flux-Flow Resistivity: Collaborative Project to Launch a Program Exploring Flux Dynamics in Weak-Pinning Systems
RUI:磁芯尺寸对磁通流电阻率的影响:启动弱钉扎系统中磁通动力学探索项目的合作项目
  • 批准号:
    0907038
  • 财政年份:
    2009
  • 资助金额:
    $ 2.24万
  • 项目类别:
    Standard Grant
Orientations of driven vortex lattice in the flux flow state
通量流状态下驱动涡晶格的方向
  • 批准号:
    20740201
  • 财政年份:
    2008
  • 资助金额:
    $ 2.24万
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    Grant-in-Aid for Young Scientists (B)
Cellular Models of Nonlinear Flux Flow, Vortex Rivers, and Noise
非线性通量流、涡流和噪声的细胞模型
  • 批准号:
    0074613
  • 财政年份:
    2000
  • 资助金额:
    $ 2.24万
  • 项目类别:
    Continuing Grant
Ultrasonic Excitation of Magnetic Flux Flow in Multilayered Thin Films of Superconductor-Piezoelectric Material
超导压电材料多层薄膜中磁通流的超声激发
  • 批准号:
    09650365
  • 财政年份:
    1997
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Studies of Ceramic Superconductors: Flux Flow and Chemical Doping
陶瓷超导体的研究:磁通流和化学掺杂
  • 批准号:
    9222919
  • 财政年份:
    1993
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    $ 2.24万
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Study of Flux-flow Dynamics in High-Tc Materials
高温材料中的通量动力学研究
  • 批准号:
    9202631
  • 财政年份:
    1992
  • 资助金额:
    $ 2.24万
  • 项目类别:
    Standard Grant
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