Vibroacoustic Control of Technical Conditions of GTE

This research is aimed at determining the technical conditions of compressor blades and turbines of GTE, which are analyzed both as individual components and in the composition of the working wheels. The paper also dwells upon analysis of combustion chamber welds by the method of free oscillations. Tests were carried out on experimental installations. Informative parameters characterizing the oscillatory process were defined. The developed defect detection methods allow: (1) to determine hidden and open mechanical defects of composite parts (lack of fusion, shrinkage cavities, non-metallic inclusions, gas porosity, casting defects, hot and cold crack, small dent); (2) to determine the hidden and open defects of welds in the structure of any composite part; (3) to determine the structural defects of composite parts (zonal or chemical heterogeneity, the emergence of macrograin borderlines on the surface, and alloy heterogeneity); (4) to determine deviations in the shape and geometrical dimensions of composite parts.