METHOD FOR VIBROACOUSTIC DIAGNOSIS OF BEARING SUPPORTS OF ROTORS OF GAS TURBINE ENGINES ON THE BASIS OF FRACTAL ANALYSIS

Abstract

Currently, more than 45.000 aircraft are operated in the world, most of them are equipped with gas turbine engines. Aircraft engines that have not exhausted the established resources and service life are removed from operation annually. As a rule, the reasons for early termination of operation are defects and malfunctions of individual engine components, their mechanical damage, as well as human errors that lead to a malfunction of the engines. Based on the analysis of the causes of failures and damages of the engines of tactical aviation aircraft, it can be concluded that in the vast majority of cases, the failures manifested themselves in increased vibration, which indicated the destruction of the bearing supports of the compressor and turbine rotors, the failure of which may lead to shutdown and damage to the gas turbine engine. Such consequences adversely affect flight safety and can lead to both the loss of the aircraft and the death of the crew. The specifics of the location of the bearing supports of the rotors greatly complicates their diagnostics in the framework of non-destructive testing. The article proposes a new method for vibroacoustic diagnostics of bearing supports of rotors of gas turbine engines, based on the use of fractal analysis. A hardware-software complex has been created that allows diagnosing the technical condition of the bearing supports of the rotors of gas turbine engines.