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2011•Journal of Shenyang Aerospace UniversityRequires access

Finite element analysis on critical speeds of a dual-rotor system

Mu Peng

Open publisher page 2 citations

Abstract

The ANSYS Parametric Design language(APDL) is used to establish a finite element model for a simple dual-rotor system and to calculate the critical speeds and normal mode of the inner rotor and those of the outer with the QR damped method or the synchronous response method.The results of the first three critical speeds of the dual-rotor system obtained by the QR damped method are in good agreement with those by synchronous response method,and the relative errors are both less than 1%.Results show that both methods of calculating the critical speeds of a dual-rotor system satisfy the requirement of accuracy.

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What this paper is about

The ANSYS Parametric Design language(APDL) is used to establish a finite element model for a simple dual-rotor system and to calculate the critical speeds and normal mode of the inner rotor and those of the outer with the QR damped method or the synchronous response method.The results of the first three critical speeds of the dual-rotor system obtained by the QR damped method are in good agreement with those by synchronous response method,and the relative errors are both less than 1%.Results show that both methods of calculating the critical speeds of a dual-rotor system satisfy the requirement of accuracy.

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Available abstract

The ANSYS Parametric Design language(APDL) is used to establish a finite element model for a simple dual-rotor system and to calculate the critical speeds and normal mode of the inner rotor and those of the outer with the QR damped method or the synchronous response method.The results of the first three critical speeds of the dual-rotor system obtained by the QR damped method are in good agreement with those by synchronous response method,and the relative errors are both less than 1%.Results show that both methods of calculating the critical speeds of a dual-rotor system satisfy the requirement of accuracy.

Key concepts: Rotor (electric), Critical speed, Finite element method, Control theory (sociology), Helicopter rotor, Dual (grammatical number), Parametric statistics, Mode (computer interface)

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