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主要研究了各向同性高温超导股线在77K、自场下的弯曲特性。首先阐述了各向同性高温超导股线的结构特点,分析了在弯曲状态下股线内部超导体不同区域的弯曲情况并建立了单根带材侧向弯曲的几何模型。在此基础上,对单根带材样品进行侧向弯曲实验,测量其在不同弯曲半径下的临界电流并分析其衰减情况,得到带材的临界弯曲半径。然后对各向同性高温超导股线样品进行弯曲特性实验,确定了超导股线的最小弯曲半径,该超导股线在电力传输及大型超导磁体方面具有潜在应用价值。
Mainly studied the isotropic high temperature superconducting strands at 77K, self-field bending characteristics. Firstly, the structural characteristics of isotropic high temperature superconducting strands are expounded. The flexural behavior of superconductors in different states of the strands under bending is analyzed and the geometric model of the lateral bending of the single strip is established. On this basis, the lateral bending test of single strip samples was carried out. The critical current under different bending radius was measured and the attenuation was analyzed. The critical bending radius of the strip was obtained. Then the bending properties of isotropic high temperature superconducting strands were tested to determine the minimum bending radius of the superconducting strands. The superconducting strands have potential applications in power transmission and large superconducting magnets.