Abstract
Pattern formation phenomena often occur in contact rotating systems. A prevention method using dynamic absorbers was suggested and a design method of the effective dynamic absorbers was formulated in the previous reports. The dynamic absorbers are individually designed one by one for each mode. However, before and after the dynamic absorbers are installed, the relativity between unstable vibrations can not be clarified exactly. In order to overcome this difficulty, the authors introduce a method using complex eigenvectors at minimum points, which means regions where unstable vibrations may occur. The effectiveness of the present method is verified from the results of numerical computations for a 5-DOF system as an example.
