Solving method of influence coefficient for rotor dynamic balancing based on finite element model

A new solving method of influence coefficient for rotor dynamic balancing is developed on the basis of analyzing the principle of influence coefficient balancing. The finite element model is established based on the rotor physical structure by using DyRoBeS software. The lateral vibration response is analyzed after adding virtual unbalance force on the attention node of finite element model. Meantime, the law of phase benchmarks to influence coefficient is studied. Therefore, it can be calculated the balancing speed influence coefficients of the rotor system according to the node vibration amplitude and phase of the balancing speed, which take the rotor dynamic balancing without trial weight. Finally, the bent single span and single disk test rig is taken as an example to measure the influence coefficients below the critical speed and over the critical speed, respectively. The results show that the influence coefficient of the proposed method is consistent with the measured method and the relatively error is small. This method can reduce the dependence of dynamic balancing experience and the on-off times to save the dynamic balance time and cost.