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Information × Registration Number 0220U104374, 0120U103591 , R & D reports Title Advanced computational techniques for sloshing analysis in fuel tanks with baffles popup.stage_title Head Strelnikova Olena O., Доктор технічних наук Registration Date 16-12-2020 Organization A. Podgorny Institute of Mechanical Engineering Problems of the National Academy of Sciences of Ukraine popup.description2 A method for determining the modes of fluid vibrations in a rigid tank taking into account the force of gravity has been developed. Based on the study of the nature of singularities in the kernels of integral operators, the method of boundary elements with subdomains for numerical solution of potential theory problems in direct formulation has been improved. Methods for determining the modes vibrations of the unfilled elastic shell of rotation, taking into account the influence of elastic deformations of tank walls on the frequency and shape of free vibrations in the presence of liquid and determining free harmonic vibrations of elastic unfilled and filled shells using one-dimensional methods of finite and boundary elements. The required number of finite elements for calculating the natural frequencies of oscillations of the shell with a given accuracy is determined. The influence of fixing conditions on the frequencies and modes of vibrations of the unfilled elastic shell of rotation is investigated. An analysis of the accuracy of the classical boundary element method in comparison with the method of boundary elements with subregions on the example of a spherical shell with baffles is given. The study of longitudinal and lateral forced oscillations of the "shell-liquid" systems is carried out. A computer study of the effects of internal baffles on the frequencies and modes of free oscillations of rigid-walled tanks and is done and compared with the results obtained by scientists from India. A numerical procedure based on the combined use of finite and boundary element methods has been developed to analyze the effects of hydroelastic interaction in two-compartment tanks. Approbation of the developed models and methods with the use of known in the literature analytical and numerical solutions and results of experimental researches is carried out. Product Description popup.authors popup.nrat_date 2020-12-16 Close