Object of the study - electromagnetic shielding of technical equipment against the impact of strong electric fields and powerful electromagnetic disturbances; the aim of the study - design of the method of rapid monitoring of stability of protective properties of metallic screens of technical equipment against the impact of strong electric fields and powerful electromagnetic disturbances; applied methods and devices - Finite Element Method, method of physical modeling, namely the methods of generating pulsed electromagnetic fields and irradiating of electric and magnetic field strength, which penetrate inside the screen, high-voltage test facility "BBC-1,2"; theoretical and practical results -a newly designed hybrid method based on the model, together with corresponding software, allows computation of 3D structure of pulsed electric and magnetic fields in the cavities of such screens, the degradation of protective properties of structurally irregular screens for resonant mode is studied experimentally, an enhancement of standard method for avionics HIRF immunity test according to the КТ-DO160D standard (section 20) is proposed, the thesis presents a new online control method, designed for stability evaluation of metallic screens protective properties with the help of electric fields on resonant frequencies of the screens, the guidelines for its implementation are given; scientific novelty - an improved mathematical model describing the process of quasi-stationary electromagnetic fields penetration inside structurally inhomogeneous metallic screens of finite size is proposed, for the first time the three-dimensional structure of electric and magnetic fields is computed for the inner volume of the cavity of a structurally inhomogeneous screen, directly stroked by lightning, it has been proven for the first time, that electric field with the frequency, equal to an eigenfrequency of the metallic screen is the most sensitive indicator of degradation of galvanic contacts between structural elements of metallic screens, as well as between cable braiding and shielding enclosure of the technical equipment; level of implementation - the results of the dissertation study were applied in the research projects ordered by the Ministry of Education and Science of Ukraine and implemented on the leading enterprises of Ukraine: National enterprise "Design Office "Pivdenne" (Dnipropetrovsk), Private Joint Stock Company (PJSC) "Aviacontrol" (Kharkiv), Research and Design Institute "Molnia" (Kharkiv); area of application - during the design of new as well as exploitation of existing metallic screening enclosures in the areas of technology, where high demands for the protection of radioelectronic equipment against external powerful electromagnetic fields are posed, namely at the objects of SE "National nuclear energy generating company "Energoatom", aviation and space areas, as well as at the enterprises: SE "Antonov", SE "DO "Pivdenne", R&D Institute "Molniya" NTU "KhPI".
