A Finite Element Model-Based Approach for Rotor Unbalance Detection and Balancing

An unbalance identification and balancing technique have been presented using a finite element model of the rotor system. Unlike conventional methods of balancing, the proposed approach of balancing computes influence coefficients using the system’s finite element (FE) model. Identification of unbalance in a single disc rotor system has served as a demonstration of the method’s applicability. The traditional method of balancing involves the laborious addition of trial weights and vibration measurement during the process of calculating influence coefficients. As the necessary information is derived from the FE model of the rotor system, the suggested method of balancing does not require the addition of trial weights. It is suggested to use an updated FE model of the rotor system in order to compute the vibration data necessary in the calculation of influence coefficients. The finite element model of the rotor system has been updated using the Inverse Eigen Sensitivity Method. In order to find the heavy spot, the unbalance in the rotor disc’s phase angle can be found using the method of unbalance identification. Numerous spin speeds of rotation have been used in the experimental studies of unbalance identification to determine if there is any effect.