Oleg V. Repetckii, Dinh Cuong Hoang

Irkutsk State Agrarian University named after A.A. Ezhevsky

This article is devoted to computer modeling and numerical analysis of the change in the thickness blades to study the effect of intentional mistuning on the durability wheels of power turbomachines. The object of the study is a radial wheel with 10 blades manufactured by Schiele (Germany), which specializes in the production aggregates for the chemical industry and ventilation equipment. The finite element method was used the TET10 finite element from the ANSYS WORKBENCH program. Five options in this paper have been provided for running mistuned wheels that can give accurate predictive distributions for forced response, mistuned wheel performance and resource estimation in cyclic symmetrical systems. According to the results of the study, two of the five options showed an increase in the value of the number of cycles to destruction wheels, the minimum percentage change in the mass and natural frequencies of the radial wheel. The obtained calculations make it possible to significantly reduce the volume of expensive experimental studies and reduce the time for designing new machines according to the criteria of efficiency, reliability, technology and resource saving of highly loaded aggregates.

durability, finite element method, mathematical models, intentional mistuning, radial wheel, turbomachines