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Information × Registration Number 0225U001924, (0123U104389) , R & D reports Title Unsteady wave processes and contact problems for deformable half-space and layer; optimal trajectories of interorbital transfers of spacecrafts with low thrust popup.stage_title Хвильові процеси в пружному шарі при нестаціонарному осесиметричному навантаженні. Head Kubenko Veniamin D., Доктор фізико-математичних наук Registration Date 11-02-2025 Organization S.P. Tymoshenka Institute of Mechanics of the National Academy of Sciences of Ukraine popup.description1 Development of an analytical approach to the study of wave processes in acoustic and elastic half-space and layer under an arbitrary nonstationary load applied to its surface, and determination of the peculiarities of the processes of propagation and multiple reflection of excited waves. Development of methods for joint optimization of mass and energy parameters and transient trajectories of interorbital vehicles with low thrust propulsion systems during maneuvering in the central gravitational field. Development of an analytical approach to the study of contact interaction of rigid flat and non-planar dies, including heated ones, with a piezoelectric half-space, establishing characteristic regularities of contact stress distribution under the dies, assessment of the influence of force and electric fields on contact parameters. popup.description2  A number of exact analytical solutions of boundary value problems for acoustic and elastic layered media under nonstationary surface loading are constructed. They are used to study the propagation of unsteady waves in the acoustic and elastic layer, the peculiarities of the process in the near and far zones, and the interaction with boundary surfaces. The solution of the system of equations describing the unsteady vibrations of piezoelectric transducers in the form of a cylinder and a ball is constructed by numerical methods. The influence of electrical and mechanical energy losses on the process features is determined. Product Description popup.authors Kiforenko Borys M. Kyryliuk Vitalii S. Kubenko Veniamin D. Levchuk Olha I. Maksymchuk Oleksandr M. Manafova Olha P. Martyniuk-Cherniienko Yuliia A. Ostos Oleksandr Kh. Tkachenko Yaroslav V. Khoroshun Tetiana L. Yanchevskyi Ihor V. popup.nrat_date 2025-02-11 Close