ANALYSIS OF THE DYNAMIC BEHAVIOR OF A ROTATING COMPOSITE HOLLOW SHAFT

Authors

  • ALDEMI APARECIDO CAVALINI JR LMEST €“ STRUCTURAL MECHANICS LABORATORY, FEDERAL UNIVERSITY OF UBERLâNDIA, SCHOOL OF MECHANICAL ENGINEERING, AV. JOãO NAVES DE ÁVILA, 2121, UBERLâNDIA, MG, 38408-100, BRAZIL. HTTP://ORCID.ORG/0000-0002-9647-2621
  • THIAGO AM GUIMARÃES LMEST €“ STRUCTURAL MECHANICS LABORATORY, FEDERAL UNIVERSITY OF UBERLâNDIA, SCHOOL OF MECHANICAL ENGINEERING, AV. JOãO NAVES DE ÁVILA, 2121, UBERLâNDIA, MG, 38408-100, BRAZIL.
  • BRUNO RMG DA SILVA LMEST €“ STRUCTURAL MECHANICS LABORATORY, FEDERAL UNIVERSITY OF UBERLâNDIA, SCHOOL OF MECHANICAL ENGINEERING, AV. JOãO NAVES DE ÁVILA, 2121, UBERLâNDIA, MG, 38408-100, BRAZIL.
  • VALDER STEFFEN JR LMEST €“ STRUCTURAL MECHANICS LABORATORY, FEDERAL UNIVERSITY OF UBERLâNDIA, SCHOOL OF MECHANICAL ENGINEERING, AV. JOãO NAVES DE ÁVILA, 2121, UBERLâNDIA, MG, 38408-100, BRAZIL.

Keywords:

ROTORDYNAMICS, COMPOSITE HOLLOW SHAFT, RAYLEIGH-RITZ METHOD, NUMERICAL INVESTIGATION,

Abstract

IN THE PRESENT PAPER, A SIMPLIFIED HOMOGENIZED BEAM THEORY IS USED IN THE CONTEXT OF A NUMERICAL INVESTIGATION REGARDING THE DYNAMIC BEHAVIOR OF A ROTATING COMPOSITE HOLLOW SHAFT. FOR THIS AIM, A HORIZONTAL FLEXIBLE COMPOSITE SHAFT AND A RIGID DISC FORM THE CONSIDERED SIMPLE SUPPORTED ROTATING SYSTEM. THE MATHEMATICAL MODEL OF THE ROTOR IS DERIVED FROM THE LAGRANGEÂS EQUATION AND THE RAYLEIGH-RITZ METHOD, WHICH IS OBTAINED FROM THE STRAIN AND KINETIC ENERGIES OF THE DISC AND SHAFT, AND THE MASS UNBALANCE. IN THIS CASE, A CONVERGENCE PROCEDURE IS CARRIED OUT IN TERMS OF THE VIBRATION MODES TO OBTAIN A REPRESENTATIVE MODEL FOR THE ROTOR SYSTEM. THEREFORE, THE PROPOSED ANALYSIS IS PERFORMED IN BOTH FREQUENCY AND TIME DOMAINS, IN WHICH THE FREQUENCY RESPONSE FUNCTIONS, THE UNBALANCE RESPONSES, THE CAMPBELL DIAGRAM, AND THE ORBITS ARE NUMERICALLY DETERMINED. ADDITIONALLY, THE INSTABILITY THRESHOLD OF THE ROTOR SYSTEM IS OBTAINED. THIS STUDY ILLUSTRATES THE CONVENIENCE OF THE COMPOSITE HOLLOW SHAFTS FOR ROTORDYNAMICS APPLICATIONS.

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Published

2016-10-31

Issue

Vol. 14 No. 01 (2017)

Section

Articles

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