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.

电缆导管导体是目前最有前途的大规模聚变磁体导体，它由绞合的绞线和插入金属外壳（称为导管）的子电缆组成。在评估导体性能的温度裕度的测试活动期间，温度裕度随着传输电流循环次数的增加而变差。根据对导线的目视检查，由于股线移动导致股线屈曲可能导致劣化。为了研究屈曲的机理，我用结构力学计算了钢绞线的运动。结果表明，热收缩力引起的滑移运动会引起位移。对滑移距离进行了实验验证，实验结果支持了计算得到的滑移量。所得结果对大尺寸磁体导体设计的发展有一定的参考价值。

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

Study on Resistance Distribution between Superconducting Strand and a Copper Sleeve in a CICC Joint Considering Three-Dimensional Strand Path

考虑三维绞线路径的CICC接头中超导绞线与铜套之间的电阻分布研究

• 发表时间: 2014
• 期刊: IEEE Transactions on Applied Superconductivity
• 影响因子: 1.8
• 作者: T. Morimura;D. Miyagi;M. Tsuda;T. Hamajima;T. Yagai;N. Koizumi;Y. Nunoya;K. Takahata;T. Obana
• 通讯作者: T. Obana

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

Investigation of Frictional Force Applied to Strands Surrounded by Other Strands and Tribological Analysis of Contact Surface in CIC Conductor

• DOI: 10.1109/tasc.2013.2291820
• 发表时间: 2014-06
• 期刊: IEEE Transactions on Applied Superconductivity
• 影响因子: 1.8
• 作者: Tsuyoshi Yagai;H. Kudo;K. Hamano;K. Yoshida;Shinji Hamaguchi;K. Natsume;T. Obana