Numerical analysis of influence coefficients for on-site balancing of flexible rotors

Balancing of flexible rotors by means of Influence Coefficients is a well-known method in the theory of rotor dynamics. For a successful application of the method Influence Coefficients are needed. They are defined as the vibration response at one measurement point due to a single unbalance in one of the balancing planes. Influence Coefficients are usually determined by measurements in test runs with defined test weights. However, Influence Coefficients can also be determined by means of a numerical analysis. This needs of course a very good model for the rotor train, including all important rotor dynamic effects. In this project a trial is made to determine Influence Coefficients by means of modelling and numerical simulation.