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Information × Registration Number 0222U003090, 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 18-02-2022 Organization A. Podgorny Institute of Mechanical Engineering Problems of the National Academy of Sciences of Ukraine popup.description2 The main objective of the research is to develop advanced computational methods and computer technology for analysis of natural and forced vibration of compound rocket fuel tanks with baffles at different stages of flight, under overload and microgravity, taking into account intensive sloshing, wall elasticity and surface tension. Object of research is the process of fluid vibrations in shell structures with compartments partially filled with liquid. Research methods are modified computational methods of finite and boundary elements, Fourier method and their combinations. New mathematical models have been developed to analyse the strength and dynamic characteristics of shells and shell structures that are partially filled with liquid, taking into account the compressibility, viscosity, nonlinear effects and elasticity of the walls. An acoustic approximation is provided to solve Euler's equations in linear formulation, assuming that the fluid is viscous and compressible. The variational formulation for study of sloshing for ideal incompressible fluid taking into account nonlinear effects is obtained. The influence of elasticity on the fluid oscillations in the shells of revolution with a partial coating of the free surface has been studied. Software modules for calculations of the dynamic state of shell structures interacting with liquid have been elaborated. Calculations of problems of dynamics of shells and shell structures with compartments partially filled with liquid, under different operating conditions are accomplished. Implementation of the proposed method and computer programs will provide a new technical level in important applications that use thin-walled structural elements, reduce the risk of accidents and environmental consequences in the operation of potentially dangerous shell structures filled with aggressive liquid in emergencies during operation, transportation, catastrophes, earthquakes, terrorist acts, etc. Product Description popup.authors popup.nrat_date 2022-03-09 Close