Search academic texts

Information × Registration Number 0224U032546, (0124U000222) , R & D reports Title Analysis of the strength of high-power Turbogenerator assembly units to ensure their reliable operation under the influence of supercritical loads to ensure the energy security of Ukraine during martial law popup.stage_title Виконання механічних розрахунків бандажного кільця ротора, підвіски статора та щитів корпусу статора (коробів) турбогенератора. Аналіз та кореляція отриманих результатів стосовно напружено- деформованого стану вузлів турбогенераторів. Head Tretiak Oleksii V., Доктор технічних наук Registration Date 14-11-2024 Organization National Aerospace University "Kharkiv Aviation Institute" popup.description1 The goal and purpose of the Project is the development of effective methods for assessing the stress-strained state (SST) of elements of high-power Turbogenerator structures at rated and emergency modes with the solution of a set of problems of thermal elasticity, thermal conductivity and ventilation in three-dimensional settings using the finite element method and modern computer systems, the feature of which is transmission initial and boundary conditions between the tasks, which will allow to carry out a detailed analysis of the strength of the elements of Turbogenerator structures and will contribute to increasing the reliability of their operation. popup.description2 Report on the performed SRW: 205 pp., 26 tables, 149 figures, 73 sources. TURBOGENERATOR, ELECTRIC MACHINE, ROTOR RETAINING RING, SUSPENSION, PRESSURE FLANGE, TURBOGENERATOR BOX, FINITE ELEMENT METHOD, STRESS-STRAIN STATE, HSS METHOD. The object of the research is the processes of "deformation" of the design elements of the turbogenerators when working at the design and above-design modes. The purpose of the work is to develop effective methods for assessing the stress-strain state of design elements of high-power turbogenerators in rated and above-design modes with the solution of a set of thermoelasticity and thermal conductivity problems in three-dimensional settings using the finite element method and modern computer systems, the feature of which is the transfer of initial and boundary conditions between tasks. Research methods: classical methods and models of the theories of thermoelasticity, thermal conductivity and mechanics of solid media for the formation of equations of state; discretization of the solving ratios for the analysis of the stress-strain state of the studied bodies based on the finite element method; numerical studies in the SolidWorks complex; the Reynolds decomposition method for solving turbulence problems in the turbulence closure part, namely the use of the k-ε model. For the first time, the following scientific problems were solved: obtained and analyzed thermal fields of retaining rings, tooth bases, stator springs in a three-dimensional setting, taking into account the forces acting on these elements; developed recommendations for increasing the reliability of design elements depending on the results of the analysis of their stress-strain state, taking into account safety margins; improved methods of drawing up a spatial scheme of forces acting on design elements; improved search criteria for elements with low reliability. The new methodology for strength computation of the high-power turbogenerator designs was created and implemented. Product Description popup.authors Oleksii V. Tretiak popup.nrat_date 2024-11-14 Close