Dynamic response analysis of a double-disc rotor system with rolling bearings based on POD method

Kuan Lu, Dong Guo, Hui Cheng, Wei Zhang, Haopeng Zhang, Chao Fu

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8 Scopus citations

Abstract

In this paper, a double-disc rotor system with two support rolling bearings is reduced by the proper orthogonal decomposition (POD) method. The finite element method (FEM) is used to establish the rotor system model (96DOFs). The basic theory of the POD method and the concrete expression in the rotor system is introduced. The rotor system is reduced to 12, 5, and 2 DOFs by the POD method, respectively. The time history curves, and frequency spectrums of the reduced and original systems are compared for verifying the accuracy of the POD method. The 2-DOFs reduced system is solved by the Harmonic balance and alternating frequency/time domain (HB-AFT), whose results are in good agreement with those by the Runge-Kutta method.

Original languageEnglish
Article number104569
JournalInternational Journal of Non-Linear Mechanics
Volume158
DOIs
StatePublished - Jan 2024

Keywords

  • High-dimensional dynamic system
  • Nonlinear vibration
  • Order reduction
  • POD method
  • Rotor dynamics

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