Non-linear dynamic of rotor-stator system with non-linear bearing clearance

TL;DR

This paper applies advanced numerical methods to efficiently analyze the non-linear vibrations of a rotor-stator system with non-linear bearing clearance, providing insights into system responses at various speeds.

Contribution

It introduces the use of the Alternate Frequency/Time Method combined with path following continuation to analyze non-linear rotor-stator vibrations more efficiently.

Findings

Successful application of the method to rotor-stator system

Detailed response orbits at different rotational speeds

Enhanced understanding of non-linear vibration behavior

Abstract

The study deals with a rotor-stator contact inducing vibration in rotating machinery. A numerical rotor-stator system, including a non-linear bearing with Hertz contact and clearance is considered. To determine the non-linear responses of this system, non-linear dynamic equations can be integrated numerically. However, this procedure is both time consuming and costly to perform. The aim of this Note is to apply the Alternate Frequency/Time Method and the 'path following continuation' in order to obtain the non-linear responses to this problem. Then the orbits of rotor and stator responses at various speeds are investigated.