Scientific journal
Scientific Review. Technical science
ISSN 2500-0799
ПИ №ФС77-57440

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INFLUENCE OF COMPRESSOR BLADE DIMENSIONS SCATTER ON DISPERSION OF BENDING VIBRATION NATURAL FREQUENCY

Nikhamkin M.S. 1 Voronov L.V. 1 Semenova I.V. 1 Bolotov B.P. 1 Golovkin A.Y. 1
1 Perm National Research Polytechnic University
It is described the calculation and experimental research of compressor blade bending vibration natural frequency dispersion due to blade dimensions scatter. Statistical analysis of sizes measurement results of a set of real blades is executed. Dimensions scatter characteristics of blades airfoil part are found. The calculation technique is developed for Monte-Carlo modeling of blade bending natural frequency dispersion. The experimental technique is developed to measure blade natural frequencies using scanning laser vibrometry. Experimental research of bending natural frequencies for the set of blades is made. Statistical characteristics of frequencies dispersion are found. Verification of Monte-Carlo modeling technique is carried out. It is found that natural frequency dispersion characteristics dependency on blade dimensions scatter limit is linear. Developed calculation technique and results may be used to reasoning of size scattering limits from the point of view resonance vibrations excluding.