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中文摘要：
螺管线圈具有结构简单,材料利用率高等优点,是一种应用较为广泛的磁体结构.但单螺管线圈也具有漏磁较大,均匀度不高的缺点.针对螺管线圈的基本特征,包括磁场强度、磁场分布、磁体的内半径、磁体的漏磁等,本文利用数值计算的方法对高温超导螺管磁体结构进行了优化.在结构优化过程中,文中采用全局搜索能力较强的遗传算法和局部搜索能力较强的非线性规划算法相结合的非线性遗传算法进行优化,使超导磁体在满足一定约束条件的情况下达到最少的超导带材用量,以节约磁体的制造成本.同时比较分析了结构优化前后超导磁体的DSV（diameter spherical volume）区域的均匀度和杂散场分布.
英文摘要：
Solenoid coil has the advantage of simple structure,high material utilization and so on,which has been widely used for superconducting magnet structures.However,it has the disadvantage of highly magnetic flux leakage and inhomogeneous.Aiming at the characteristic parameters of solenoid coil including the magnetic field strength,magnetic field distribution,magnet inner radius,magnetic field leakage,we use the method of optimization design to improve magnet structure according to the basic characteristics of solenoid coil.In the process of magnet structure optimization in order to achieve a minimum of superconducting strip dosage and save the manufacturingcost of magnets in the case of satisfying certain needed conditions,nonlinear genetic algorithm is used,which combines the capability of global search of genetic algorithm with strong local search ability of nonlinear programming algorithm.At the same time,it is analyzed and compared that diameter spherical volume and stray field distribution of before and after structure optimization of the superconducting magnet.
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