NUMERICAL ANALYSIS OF DEFECTS IN THE ROTOR SUPPORTING STRUCTURE

摘要

In the presented article the authors’ attention was focused on analysis of supporting structure defects. The object of investigation was the large-dimension Rotor Dynamics and Slide Bearing Research Rig. The proposed modeling idea is based on interactions between original and commercial computer codes. Non-linear bearings’ properties are described using codes of MESWIR series – originally invented in IFFM PASci to model rotor-bearings systems. Dynamics properties of the supporting structure are analyzed with FEM program ABAQUS. Thanks to effective interactions between both software applications, a full model of the rotating machine was created. A few classes of defects which could appear during operation process were considered. In scope of investigation the time-consuming numerical calculations were performed. It allowed to access the influence of some defects on dynamics characteristics of the rotating machine. It has been proved in the article that some defects of supporting structure might have significant influence on the system vibrations. The article also presents the possibilities of diagnostics of supporting structure defects.