Abstract
Problematic. At adaptation of a design of discs of rotor of air gas-turbine drives (GTD) it is necessary to conduct, in particular, strength calculations for what to create the computer models corresponding to stated designs (delineations) and operation conditions. If creation of a geometrical part of model does not call special difficulties the algorithm of creation of an is finite-element grid models for carrying out of calculations of performances of the disc stress-strain conditions (SSC) with blades can be modified taking into account development of programs for calculate.
 Research objective. To offer the algorithms allowing with the set exactitude to calculate performance of the SSC of discs with blades on personal computers, and also to represent outcomes in the form of schedules of type "surface".
 Realization technique. On an example of the disc of 2nd stage of the compressor of GTD the algorithm of construction of a three-dimensional is finite-element grid of the disc of GTD from the separate blocks which have been "pasted together" in a unified grid has been created. Numerical calculations (a contact problem of thermoelasticity, isotropic materials) are carried out. For preparation of construction of schedules of type "surface" the interface program of transformation of the table of columns in the two-dimensional table is created.
 The results of research. Are created and explicitly techniques of reaching of research objectives are described.
 Conclusions. The created techniques allow to carry out on the limited computer powers exact enough control calculations of discs with blades in three-dimensional statement, to conduct visualisation of distribution of stresses and contact forces of a zone of a contact "disc-blades" in the form of schedules of type "surface".
Highlights
offer the algorithms allowing with the set exactitude to calculate performance of the SSC
Ключові слова: диск авіадвигуна; розрахункова модель; контактна задача; концентрація напружень; методика
Summary
Осталось задать условия нагружения и наложить ограничения (граничные условия, ГУ). Вначале рассмотрим условия нагружения. Если есть сведения о температуре внутри ротора, то ее можно задать на диске и решить задачу стационарной теплопроводности только для диска. В крайнем случае, для диска компрессора задачу стационарной теплопроводности системы диск – лопатка – пластина можно не решать, а назначить во всех узлах СЕС системы текущую температуру (как нагрузка), равную T∞. Была создана программа с названием Symmetry, формирующая нужный формат записи формулы (1) для файла .neu при an = − am = 1. Если такою командою создать набор с номером 1 и именем Constraint, но пустой, то блок 506 будет таким, как показано на рис. Что на стыках поверхностей АсВиБсВ располагаются узлы, которые попали бы в два списка: во-первых, узлов с заданными условиями циклической симметрии, во-вторых – с закреплением по направлениям осей θ и Z. Поверхности возможного контакта системы диск – лопатка в: диске (а); лопатке (б)
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