UNCERTAINTY ANALYSIS OF FLEXIBLE ROTORS CONSIDERING FUZZY AND FUZZY RANDOM PARAMETERS

Authors

  • FABIAN ANDRES LARA MOLINA FEDERAL TECHNOLOGICAL UNIVERSITY OF PARANá
  • EDSON HIDEKI KOROISHI FEDERAL TECHNOLOGICAL UNIVERSITY OF PARANá
  • VALDER STEFFEN JR FEDERAL UNIVERSITY OF UBERLâNDIA

Keywords:

UNCERTAINTY ANALYSIS, ROTORDYNAMICS, FUZZY VARIABLE

Abstract

THE COMPONENTS OF FLEXIBLE ROTORS ARE SUBJECTED TO UNCERTAINTIES. THE MAIN SOURCES OF UNCERTAINTIES INCLUDE THE VARIATION OF MECHANICAL PROPERTIES. THIS CONTRIBUTION AIMS AT ANALYZING THE DYNAMICS OF FLEXIBLE ROTORS UNDER UNCERTAIN PARAMETERS MODELED AS FUZZY AND FUZZY RANDOM VARIABLES. THE UNCERTAINTY ANALYSIS ENCOMPASSES THE MODELING OF UNCERTAIN PARAMETERS AND THE NUMERICAL SIMULATION OF THE CORRESPONDING FLEXIBLE ROTOR MODEL BY USING AN APPROACH BASED ON FUZZY DYNAMIC ANALYSIS. THE NUMERICAL SIMULATION IS ACCOMPLISHED BY MAPPING THE FUZZY PARAMETERS OF THE DETERMINISTIC FLEXIBLE ROTOR MODEL.  THEREBY, THE FLEXIBLE ROTOR IS MODELED BY USING BOTH THE FUZZY FINITE ELEMENT METHOD AND THE FUZZY STOCHASTIC FINITE ELEMENT METHOD. NUMERICAL SIMULATIONS ILLUSTRATE THE METHODOLOGY CONVEYED IN TERMS OF ORBITS AND FREQUENCY RESPONSE FUNCTIONS SUBJECT TO UNCERTAIN PARAMETERS.

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Published

2015-02-07

Issue

Vol 12, No 10 (2015)

Section

Articles

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