同轴脉冲形成线的运输振动环境适应性研究

为了准确评估某MV级Tesla型脉冲功率源的运输振动环境适应性水平，针对脉冲功率源中采用悬臂绝缘支撑结构的同轴脉冲形成线，通过仿真和试验结合的方法开展研究。针对叠层结构式内外磁芯，提出一种通过结构元胞等效材料参数和坐标变换的等效建模方法进行有限元建模，通过模态试验修正有限元模型，首次对比研究了绝缘油对形成线的模态频率和阻尼的影响，仿真分析了形成线车载运输典型工况的应力及响应，设计实施了大尺寸形成线等效件振动试验进行验证。通过振动试验发现了形成线结构存在非线性，通过仿真分析和等效件试验验证，同轴脉冲形成线现有结构设计基本满足车载运输振动环境适应性要求。

Research on transportation vibration environmental adaptability of coaxial pulse forming line

To evaluate the vibration environmental adaptability of Tesla-type pulse generator under vehicle transportation condition, simulation and verification test were carried out for the coaxial pulse forming line (PFL) with cantilever support insulators. An equivalent modeling was proposed for the inner and outer magnetic cores with laminated structure. The finite element model was modified according to the modal test results. Thus the effect of insulating oil on the modal frequency and damping of the PFL was studied, the stress and response of PFL under typical transportation conditions were obtained by simulation, and the vibration test of PFL equivalent parts was conducted to verify the simulation result. It was found that the structure of the PFL were nonlinear in the vibration test. The simulation analysis and the vibration test of equivalent parts verify that the existing structure of the coaxial PFL meets the requirements of vehicle transportation vibration environmental adaptability.