抄録
This paper describes the numerical calculations on the vibrations of a structure excited by unbalanced rotors. When some rotors run on a base plate, which is free to vibrate horizontally, some kinds of vibration modes, i.e., in-phase synchronization, out-of-phase synchronization, and non-synchronization are observed under some operational conditions. According to our investigation of effects of a mass of unbalance, we clarify the characteristic of two types of non-synchronization. One is quasi-periodic vibration, and the other is chaos.
