An alternate approach for Influence Coefficients computation for Unbalance identification in a multi disc rotor system

Abstract

This work introduces an Influence Coefficient-based approach for identifying imbalances in a multi-disc rotor system. A method was developed that employs the measurement of imbalance response at specified locations and computes the effect coefficient using the finite element model of the rotor system during the unbalance identification process. Experiments on a rotor test rig have shown that the method works well for balancing multi-disc rotor systems. Using influence coefficients from a finite element model in the imbalance response identification procedure means that a long experimental trial run is not needed. It is very important to make sure that the finite element model of the rotor system is correct in order to find the source of the imbalance. The method may look at how unevenly the rotor shaft system is spread out. The obtained influence coefficients from the updated finite element model of the rotor system are used to create an Influence Coefficient matrix. The experimental rotor system was made unbalanced at certain angles, and the resulting vibrations were recorded at certain measurement sites to make the response vector. So, the algorithm finds the imbalance in the rotor system by using the unbalance response values at the measurement points and the effect coefficient matrix. The suggested solution is thought to work well for balancing systems with many discs.