Interval analysis method for dynamical properties of rotor system with uncertain parameters
FANG Bo
ZHANG Jie-jie
GAO Yu-fei
Abstract：In order to study the dynamical properties of rotor system with uncertain parameters, a non-probabilistic interval analysis method was proposed to analyze the rotor system.Based on the interval mathematics and interval perturbation theory,the calculation formula of natural frequencies of rotor was established.The variation relationship of natural frequencies with the system parameters was obtained with the interval analysis method,and the variation range of critical speed of rotor was attained.The proposed method decreases the excessive requirements in the uncertain parameter information in the traditional probability analysis,which can provide a new way to solve the dynamical property problems of rotor system with uncertain parameters.The numerical examples prove the validity of the results in the proposed method. The interval analysis method possesses such advantages as high accuracy and low calculated amount.
Keywords：aero-enginerotor dynamicsinterval analysisuncertain parametercritical speedeigenvaluenon-probabilityinterval perturbation method
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 83-87 )