PHYSICAL PARAMETER IDENTIFICATION OF A METAL RUBBER ANNULUS STRUCTURE BASED ON MODEL UPDATING

摘要

The metal rubber, which is designed to be annulus for the support of flexible rotor and characterized by favorable damping features, requires accurate parametric model for great application prospect. With the integration of simulation and experiments, a finite element model updating procedure of metal rubber annuluses structure was presented based on vibration test of metal-rubber-annulus-supported bearing system. Experiment modal analysis (EMA) was conducted while the simulation part of this study achieved an establishment of the FE model of the annulus structure with the corresponding parameters (stiffness, damping, etc.) in NASTRAN. Comparisons of the identified modal parameters obtained from updating and test results were performed. Good correlations were found which demonstrate physical parameters obtained are reliable with enough modeling accuracy.