CFETR CS模型线圈导体绕组等效材料性能研究

Research on equivalent material properties for conductor winding pack of CFETR CS model coil

中国核聚变工程试验堆中心螺线管线圈(China fusion engineering test reactor central solenoid,CFETR CS)模型线圈管内电缆导体(cable-in-conduit conductor,CICC)绕组是由超导电缆、不锈钢铠甲绝缘材料组成,在空间上呈周期性分布的大型复杂绕组结构。在进行中心螺管模型线圈分析过程中,为了简化模型、减少计算量、缩短计算时间同时满足分析结果精度的要求,文章通过引入均匀化理论推导出等效弹性参数的求解方程;结合ANSYS有限元分析软件建立导体绕组的单胞模型,在给定的边界条件下通过三维有限元分析方法,对绕组的等效材料力学性能进行分析预测;同时运用该方法准确计算出了国际热核聚变实验堆(international thermonuclear experimental reactor,ITER)CS的等效材料性能,并计算了CFETR CS模型线圈CICC导体绕组等效材料性能。该方法为进一步开展CFETR CS模型线圈乃至CFETR大型磁体的结构分析奠定了一定的基础。

The cable-in-conduit conductor(CICC) conductor winding pack of China fusion engineering test reactor central solenoid(CFETR CS) model coil is a large, complex and important structure that is spatially periodically distributed in superconducting cables, stainless steel and insulating materials. In order to simplify the model, reduce the calculation, shorten the calculation time and conform with the requirements of the accuracy of the analysis results, this paper deduces the equation of equivalent elastic parameters by introducing the homogenization theory in the process of analyzing winding pack. The unit cell model of the conductor winding pack is established by ANSYS. The equivalent material properties of the coil are analyzed and predicted by the three-dimensional finite element analysis under the given boundary conditions. The paper uses this method to accurately calculate the equivalent material properties of the international thermonuclear experimental reactor(ITER) central solenoid coil. Then the equivalent material properties of CICC conductor coils in CFETR CS model coils are calculated. This study could lay the foundation for the future structural analysis of CFETR CS model coils and even large CFETR magnets.