Study On The Simulation Algorithm And The Simulation System Development Of Direct Lightning Electromagnetic Environment

Lightning is a strong discharge phenomenon, it has obvious features as large current,high temperature, high voltage.etc. At the lightning occurs moment release is extremelystrong current, powerful electromagnetic pulse, inevitably to all sorts of importantengineering equipment caused great damage, leading to various important equipmentespecially electronic equipment failure and even serious damages.At present, in the field of space launch, all sorts of electronic components incommunication, calculation and measurement instrument used in great quantities, theequipment for all kinds of the sensitivity of the electromagnetic interference is more andmore high, resulting in the current common engineering structure lightning protectionmeasures can’t meet these important engineering structure internal electronic equipmentlightning protection needs.Therefore, the lightning electromagnetic environment of electromagneticcompatibility problems, develop an object-important engineering structure of lightningprotection simulation system, so as to explore the lightning electromagnetic interferenceagainst the methods and measures of national economic development is the urgent needfor national development, also has the important practical significance.Combined with the requirements of the project and the shortage of the study in theoryand engineering application, this dissertation is devoted to the study on the simulationalgorithm theory and the simulation system development.In the aspect of theory, the author discusses the method of index Fourier transformbased on the band which is on the basis of spectrum lightning current distribution andenergy distribution, and also, the basic analysis on the two mainly important influencingfactors of the conductor current distribution and the distribution of the magnetic fieldinside. At last, accounted for some phenomenon which is hard to predict during the simulation calculation process.In the aspect of system development, combining with major project for lightningprotection of the actual demand of the simulation system, focuses on the selection ofsystem development tools, former processing module, the current distribution calculationmodule and magnetic field distribution calculation module of the development process,etc.