METHOD OF PROVIDING STABILITY OF TURBO MACHINE WORKING BLADES TO SELF-OSCILLATIONS Russian patent published in 2019 - IPC F04D29/38 

FIELD: engine building.

SUBSTANCE: invention relates to propulsion engineering and can be used in gas turbine engine tuning to provide dynamic strength of high-loaded blades of axial compressors. In the method of providing stability of turbo machine working blades to self-oscillations, at which the blade is built up against self-oscillations taking into account permissible structural limitations, a stability criterion is determined, according to which the resistance to self-oscillations is determined. First, for the initial blade, determining the cross-section requiring amplification, specifying the additional weight of the blade, adjusting the initial blade from self-oscillations by distributing the additional mass in the region of the defined cross-section, note here that stability criterion used is relative approach of center of gravity and center of stiffness of cross-section of detuned vane compared to initial vane at which value of not less than preset one concludes on resistance to self-oscillations.

EFFECT: increased rigidity of blade due to approach of center of mass and center of stiffness in section of blade, which requires reinforcement.

1 cl, 3 dwg