In aerospace systems and automotive industry flexible elastic and thin-walled structures are widely used. The adequate mathematical models are in the process of development as well as numerical algorithms for examination of the features of processes of deformation of panel and arch designs with large displacements and arbitrary angles of rotation of the normal. For the discretization of the original continuum problem in spatial variables, the finite difference method can be used with the replacement of differential operators by finite-difference second-order approximations. The computational algorithm for solving a substantially nonlinear boundary-value problem is constructed on the basis of adaptation of the calculation method with construction of an explicit two-layer difference scheme in time of the second order of accuracy. The influence of the boundary conditions on the features of subcritical and supercritical behavior of the elastic arch structure under the influence of the surface load of the “tracking” type is considered.
Abstract. Modern development level of generation methods of powerfull electromagnetic impulses and radiation forming ways defines development possibility of wide class of directed energy systems and means. In electromagnetic systems and means impacted on biological objects (human) and environment development area and for force systems in electronic warfare (EW) area the following in most known: electromagnetic means of lethal effect, large power generation means for force systems of EW, electronic means of non-lethal effect and means of directed electromagnetic effect on environment. In the first part of the paper questions of powerful electromagnetic impulses generation improvement for force systems creation of radio-electronic suppression of different kinds of radio-electronic systems (RES) and especially systems of modern high-precision weapon are highlighted. It is exceedingly important problem in perspective armament and military equipment development. Methods and ways of powerfull nanosecond impulses generation are discussed. It contains the following works: -theoretic justification of powerful nanosecond impulses generation method abilities and they's main parameters for possible practical use in perspective systems of force electronic warfare of RES termination development is made; -results of foreign and domestic researches of creation of nano-and microsecond duration UHF-pulses and ultra-thin electromagnetic pulses and also electromagnetic radiators with magnetoimplosive current generators supply are given -the variants of UHF weapon used abroad are presented and also examples are given for creation of means of directed electromagnetic impact to human for the fight against terrorism. In the second part of the paper basing on interactive materials, issues of geophysical perturbations in ionosphere made naturally and artificially are highlighted as powerfull impact sources in nature. Corresponding description of deliberate methods and means of impact to environment (HAARP type of RLS) and directing of radiation heating stands and secondary ionosphere radiation radiomonitoring is given. In the final third part of the paper problems of possible (expected) development directions of electromagnetic radiation impact on physical objects and environment methods and they's ways of solving are approximately formulated.
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