Strand buckling analysis under large electromagnetic force by using structural mechanics and strand trace measurement

利用结构力学和钢绞线痕迹测量分析大电磁力下的钢绞线屈曲

• 批准号: 24760700
• 负责人: YAGAI Tsuyoshi
• 金额: $ 2.91万
• 依托单位: Sophia University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24760700/
• 关键词: 核融合; ケーブル・イン・コンジット導体; Nb3Sn; 曲げ歪み; 熱収縮応力; 座屈; 超電導特性劣化; 大型超電導マグネット; ニオブ３スズ線; 臨界電流特性劣化; 電磁力; 構造力学

The Cable-In-Conduit conductor is commonly used as the most promising one for large-scale fusion magnets, which consists of twisted strands and sub-cables inserted into the metal case called conduit. During test campaign to evaluate the temperature margin for the assessment of the conductor performance, the temperature margin was getting worse as the number of transport current cycle increases. According to the visual inspection of the conductor, strand buckling due to strand movement might cause the deterioration. In order to investigate the mechanism of the buckling, I calculated the strand movement by using structural mechanics. The results showed the slip motion due to thermal contraction force would cause the displacement. Experimental investigation for certification of the slip distance carried out and its result supported the slip obtained by the calculation. The results will useful for the development of the conductor design activities for large scale magnets.

接线套件导体通常用作大规模融合磁铁最有希望的导体，该磁铁由扭曲的链和插入称为导管的金属外壳中的子台组成。在评估评估导体性能的温度余量的测试活动中，随着运输电流周期的增加，温度率越来越严重。根据对导体的目视检查，由于链运动而引起的链屈屈可能会导致恶化。为了研究屈曲的机制，我使用结构力学计算了链运动。结果表明，由于热收缩力引起的滑动运动将导致位移。实验研究对进行的滑动距离进行认证，其结果支持通过计算获得的滑动。结果对于大型磁铁的导体设计活动的开发将有用。

项目成果

Analysis of 3-D Locations of All Strands in CIC Conductor

• DOI: 10.1109/tasc.2011.2177509
• 发表时间: 2012-06
• 期刊: IEEE Transactions on Applied Superconductivity
• 影响因子: 1.8
• 作者: D. Miyagi;S. Teshima;S. Nakazawa;D. Arai;M. Tsuda;T. Hamajima;T. Yagai;N. Koizumi;Y. Nunoya;K. Takahata;T. Obana

Thermal Stability of Butt Joint for CS Conductor in JT-605A

JT-605A中CS导体对接接头的热稳定性

• 发表时间: 2014
• 期刊: IEEE Transaction on Applied Superconductivity
• 作者: T. Takao;Y. Kawahara;K. Nakamura;Y. Yamamoto;T. Yagai;H. Murakami;K. Yoshida;K. Natsume;S. Hamaguchi;T. Obana;K. Takahata;S. Imagawa;T. Mito
• 通讯作者: T. Mito

Optimal Pitch Analysis Governing Cotnact Strand Number and Lengths With Cu Sleeves at CIC Joints

控制 CIC 接头处铜套管接触股数和长度的最佳节距分析

• 发表时间: 2012
• 作者: S. Nakazawa;S;Teshima;D. Arai;D.Miyagi;M. Tsuda;T. Hamajima;T. Yagai;Y. Nunoya;N. Koizumi;K. Takahata;T. Obana
• 通讯作者: T. Obana

大型CIC導体における素線座屈現象の理論解析

大型CIC导体中导线屈曲现象的理论分析

• 发表时间: 2012
• 作者: 濵野 慧;吉田一貴;谷貝 剛
• 通讯作者: 谷貝 剛

Buckling Analysis of Nb3Sn Strand for Large Scale Cable-In-Conduit Conductor

大型电缆套管导体Nb3Sn绞线的屈曲分析

• 发表时间: 2013
• 期刊: IEEE Transaction On Applied Superconductivity
• 作者: T.Yagai;K. Yoshida;K. Hamano
• 通讯作者: K. Hamano