磁绝缘传输线阴极准直建模与仿真  

Alignment modeling and simulation of magnetically insulated transmission line cathode

作　　者：何德雨 呼义翔[1] 曾江涛[1] 杨实[1] 周亚伟 孙江[1] 尹佳辉[1] 丛培天[1] HE Deyu;HU Yixiang;ZENG Jiangtao;YANG Shi;ZHOU Yawei;SUN Jiang;YIN Jiahui;CONG Peitian(State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi′an 710024, China)

机构地区：[1]强脉冲辐射环境模拟与效应国家重点实验室西北核技术研究所,陕西西安710024

出　　处：《国防科技大学学报》2021年第3期66-72,共7页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(51577156)。

摘　　要：大型脉冲功率装置的磁绝缘传输线(Magnetically Insulated Transmission Line,MITL)阴极长度可达十余米,在悬臂结构下由于重力引起的末端挠度变形将达数厘米。如果不进行准直,由此造成的阴阳极间隙误差可能引起较明显的电流损失。借鉴HermesⅢ装置基于倾斜垫片的直线度调节方案,设计了用于准直原理验证的Mini-MITL阴极。根据阴极圆筒尺寸参数、倾斜垫片设计参数以及倾斜垫片旋转角度,建立了阴极筒关键节点坐标的数值模型,得到竖直和水平方向的理论修正坐标。作为验证,在SolidWorks环境中建立坐标测量参考基准,得到的三维仿真坐标与数值建模坐标具有较好的一致性。基于SolidWorks Simulation对阴极的重力变形进行了仿真,根据仿真结果调整倾斜垫片的相对旋转角度,修正竖直方向挠度的同时兼顾水平方向直线度,在该策略下的竖直和水平方向准直误差均低于阈值。在离散调节策略的基础上进行了连续可调的改进优化,改进后的准直精度得到进一步提升。The cathode of MITL(magnetically insulated transmission line)of large scale pulse power plant can be more than ten meters,and the deflection of cantilevered structure end as a result of gravity might be as big as several centimeters.If without alignment measures,the gap error between anode and cathode will lead to obvious current loss.By taking reference of the alignment strategy of HermesⅢbased on tilt spacers,a so called‘Mini-MITL’cathode was designed for the validation of alignment principle.According to the parameters of the designed cathode,as well as the rotating angels of the tilt spacers,a numerical coordinate model of key points of the cathode stalk was built.The vertical and horizon coordinates corrected by tilt spacers were thus got.For validation,coordinate measuring reference was built in SolidWorks environment.The coordinates of 3D simulation and numerical model matched well.The deflection of the designed cathode was simulated by SolidWorks Simulation.The rotating angles of tilt spacers were adjusted according to the simulation results to balance the vertical deflection and keep the horizon straightness.The alignment errors of vertical and horizon direction were both less than the threshold.Continuously adjusting strategy was studied based on the discretely adjusting strategy.The alignment accuracy was notably promoted after improvement.

关 键 词：磁绝缘传输线 准直 倾斜垫片 直线度调节 SolidWorks仿真 

分 类 号：TM835.4[电气工程—高电压与绝缘技术]