Application of a high-speed balancing facility digital model to prepare and conduct trials for aircraft engine rotors

The paper presents digital model of vacuum high-speed balancing facility MAI. Russian and foreign experience of usage of vacuum chambers for rotor balancing and research purposes was reviewed. Example of usage of the proposed high-speed balancing facility digital model for development of the layout scheme of the high-pressure rotor of aviation engine with low-bypass ratio inside the facility prior its testing was observed. Example of usage of finite element model of vacuum chamber for identification of resonant modes related to coupled modes of the struts-facility dynamic system was shown. The issues of damping consideration during preparation of vacuum facility computational models were observed. Dynamic model of vacuum balancing facility built in DYNAMICS R4 software for further usage in simulations related to rotordynamics was proposed. The issues of computational rotor models preparation on example of verification of high-pressure rotor model based on results of virtual modal tests, performed for its main load frame structure on the base of its solid finite element model, were observed. Principle of model creation for rotor-bearings-tooling-struts-balancing facility dynamic system was described. Example of usage of vacuum facility dynamic model for planning of dynamic tests of high-pressure rotor related to investigation of constructive measures related to its assembling on vibration activity of the rotor in operating range was shown. The case of usage of the vacuum facility dynamic model to prepare for the experiments related to rotor dampers operation check during rotor tests at high-speed balancing facility was observed.