Direct Current Injection Test Devices on Metal Cylinder: Experiment and Numerical Simulation

In order to study the lightning indirect effects on the metal cylinder, the direct current injection test devices on the metal cylinder were studied in this paper based on experiment and simulation. The return conductor configuration was designed. A giant magneto resistive (GMR) sensor was calibrated to measure the intensity of the magnetic field inside and outside the metal cylinder. The impulse current injection test system similar to coaxial transmission line was established and the injection experiment was carried out. In order to verify the experimental results, a numerical simulation using the CST Microwave Studio was given. The magnetic field intensity inside and outside the metal cylinder is discussed by comparing the experimental and computational results. Moreover, the space distribution of the magnetic field is also simulated. The results show the feasibility of the test devices. The conclusions provide a foundation for further lightning indirect effect test on cylindrical ordnance.