Vibration analysis of a misaligned rotor—coupling—bearing system passing through the critical speed

Author:

Prabhakar S1,Sekhar A S1,Mohanty A R1

Affiliation:

1. Indian Institute of Technology Department of Mechanical Engineering Kharagpur, India

Abstract

The transient response of a misaligned rotor—coupling—bearing system passing through the critical speed has been analysed by using the finite element method (FEM) for flexural vibrations. The coupling has been modelled in two ways: a frictionless joint and a joint with stiffness and damping. From the vibration analysis, the subcritical speeds at one-half, one-third and one-fourth the critical speed have been found when the misaligned rotor—coupling—bearing system passes through its critical speed. The continuous wavelet transform (CWT) has been used as a tool to extract the silent features from the time response of the rotor system. A parametric study has been carried out to investigate the transient response of this rotor system for different angular accelerations in different types of misalignment.

Publisher

SAGE Publications

Subject

Mechanical Engineering

Reference22 articles.

1. FEATURE ARTICLE items of special interest, tutorials, and surveys: Flexible Couplings: Study and Application

2. Design and Application Criteria for Connecting Couplings

3. Woodcock J. S. The effects of couplings upon the vibrations of the rotating machinery. In Proceedings of International Conference on Flexible Couplings, University of Sussex, Brighton, 1977, pp. E-1-1–E-1-20 (Michael Neale and Associates Limited).

4. Effects of coupling misalignment on vibrations of rotating machinery

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