基于Quench-Back保护的超导螺线管磁体失超过程数值模拟研究

超导磁体结构件的Quench-Back效应在超导磁体失超保护中已获得了广泛应用，但关于Quench-Back效应的理论研究尚待深入。本项目将对基于Quench-Back保护的超导螺线管磁体失超过程进行数值模拟研究。建立包含Quench-Back效应的，三维温度场、二维轴对称电磁场和集总参数电路耦合的失超过程三维热-电-磁模型及其求解方法，研究Quench-Back效应对失超过程局部过热的控制规律。为提高失超过程过电压计算的准确性，分别从"路"的观点和"场"的观点建立磁体内部电压分布及过电压的计算方法，研究Quench-Back效应对失超过程过电压的影响规律。建立磁体失超过程内部应力计算模型与求解方法，研究Quenc-Back效应对失超过程冲击应力的影响规律。本项研究将丰富超导磁体失超过程数值模拟理论，为Quench-Back效应在失超保护中的应用提供理论依据。

Quench-Back in structural component of superconducting magnet has been widely used in quench protection of superconducting magnet, but the theory of Quench-Back still need be further studied. This research project will perform numerical study on quench process in superconducting solenoid magnet protected by Quench-Back. Develop a three-dimensional coupling thermal-electromagnetic-circuit model and solving method for quench process, including Quench-Back effect, three-dimensional temperature field, two-dimensional axisymmetric electromagnetic field and lumped circuit. Study the control law of Quench-Back on local overheat in magnet during quench process. To increase the accuracy of calculation for over voltage in magnet during quench process, develop a calculation method for voltage distribution and over voltage in the magnet from the viewpoint of "circuit" and "field". Study the influent law of Quench-Back on over voltage during quench process. Develop a calculation model and solving method for the internal stress in magnet during quench process. Study the influent law of Quench-Back on shock stress in magnet during quench process. This research project will enrich the theory of numerical simulation on quench process of superconducting magnet, and provide theoretical guidance for the application of Quench-Back in quench protection.