Open AccessGAS TURBINE ENGINES IMPELLERS FORCED VIBRATION AND STRESS-STRAIN STATE INVESTIGATION
Author(s) -
Serhii Morhun
Publication year - 2020
Publication title -
problemi občislûvalʹnoï mehanìki ì mìcnostì konstrukcìj
Language(s) - English
Resource type - Journals
ISSN - 2079-1836
DOI - 10.15421/4219038
Subject(s) - impeller , vibration , finite element method , structural engineering , stress (linguistics) , gas turbines , mechanical engineering , turbine blade , engineering , stress–strain curve , flow (mathematics) , turbine , blade (archaeology) , mechanics , acoustics , physics , linguistics , philosophy
The method of the gas turbine engine impeller forced vibration and stress-strain state parameters calculation is given. Using the finite element method, a refined mathematical model was developed for the several types of impellers most widespread in the practice of gas turbine engines building. The developed mathematical model takes into consideration the impeller blades geometric parameters and the construction of blades connectors. The results of its forced vibration frequencies calculation, caused by the influence of non-stationary gas flow are given for different types of the blades connectors. The dependencies of the impeller blades stress-strain state from the value its feather geometric perameters have been studied too.