Proceedings of the International Conference on Noise and Vibration Engineering ISMA 2014 pages:3907-3921
ISMA edition:26 location:Leuven, Belgium date:15 - 17 September 2014
As noise and vibration requirements become more and more stringent in many of today’s engineering applications, the need for robust identification methods increases proportionally. In some cases, the identification of a component is greatly complicated by the presence of a (supporting) substructure that cannot be removed during the identification. This paper will investigate what is necessary to make the experimental decoupling of a complex industrial component (e.g. a gearbox) from a supporting structure (e.g. a test rig) feasible on an experimental level. The dual approach for substructure decoupling will be verified on a finite element model representative for a gearbox and extended to a more generalized decoupling approach. Also the necessity of measuring the rotational degrees of freedom at the coupling points, and by extension, the necessity of measuring the coupling degrees of freedom will be discussed. Finally the influence of the conditioning of the matrices used for the substructuring is discussed together with a detailed analysis of the influence of several measurement error types on the quality of the results.