When two rotors mounted at the end of the shaft how many nodes will occurs?

When two rotors are mounted at the end of a shaft, the system can exhibit one or more nodes depending on the mode of vibration. Typically, for a simple system with two rotors, there may be two nodes formed at the points where the influence of the rotors cancels each other out. However, the exact number of nodes can vary based on factors such as the rotor configuration, shaft properties, and operating conditions. In more complex scenariOS, additional nodes could emerge due to the interactions between the rotors and the shaft dynamics.