Numerical Simulation Of High Frequency Magnetic Field

The material and structure of the part have a direct impact on its electromagnetic field effect.Due to the electromagnetic environment interference and the unstable performance of experimental materials,the actual engineering experiment will also be affected by many factors such as the depth and breadth of the research.With the improvement and development of modern finite element simulation methods and computer technology,people have gradually begun to use finite element simulation methods to simulate structural parts of various materials in order to achieve the performance guided design and performance prediction of the structural parts of various materials.In this subject research,a variety of material structural parts were visualized and simulated,and the finite element software ANSYS was selected,and a calculation model for the effective space of the electromagnetic field of the material was designed.According to the ANSYS help manual and the calculation principles of high frequency magnetic field reflectivity,transmittance and absorptance,the research is based on the dual-port algorithm based on transmission line theory,and APDL programming is used to realize the automatic process of ANSYS electromagnetic field numerical simulation select element type,select material attributes,geometric model creation,the division of volume meshes and surface meshes,the loading of boundary conditions,the application of loads,the selection of analysis types,and the output of result data,which calculates the electromagnetic field effect of simple objects.Its main purpose is to establish a numerical calculation model.Application of waveguide structure model: from the total length of the calculation model,electromagnetic wave loading method,the unit grid of the calculation model,the plane wave incident port position,the plane wave receiving port position,the air buffer thickness determination of Z+ axis,and the air buffer thickness of Z-axis,the determination of the thickness of the Z+ axis PML layer,the determination of the thickness of the Z-axis PML layer,the boundary conditions and the load application,etc,which determine the rationality of the numerical simulation calculation model.Computer experiments show that the thickness of each area of the effective electromagnetic field has a very weak influence on the calculation of the electromagnetic field effect of the material,and the number of unit layers in each area is the important key to determining whether the material can be simulated.The main reason is that in the calculation of finite element,the unit is a carrier of electromagnetic wave propagation and attenuation interaction,and the geometric size of this model can only reflect the relationship between electromagnetic wave far field and near field.Through the electromagnetic field effect analysis of the transparent surface parts of the front windshield of the aircraft,based on the APDL secondary development computer-aided system,a new algorithm for calculating the electromagnetic field effects of the specific curved parts is designed,which is the electromagnetic field analysis of the curved structure parts for theoretical basis.Computer practice and theoretical analysis show that it is possible to use the dual-port algorithm to calculate the electromagnetic field effect generated by the material structure sheet.One of the main advantages of the dual-port algorithm is that it does not need to fully consider the interaction of the complex electromagnetic fields of the material itself,and only uses the external ports to study the influence of these electromagnetic waves on the material structure,which greatly simplifies the research process.It is conducive to the study of the numerical value of the high-frequency magnetic field and has guiding significance for the actual engineering.