Abstract
This paper presents a simple design method for tuned dynamic mass systems, which are adjusted by a concept of pseudo mode control. The intension of the pseudo mode control is to make the target structure practically behave as a SDOF system by suppressing the growth of a few higher modes such as the second mode and the third mode. Since giving high viscous damping has a tendency to stimulate the growth of higher vibration modes, the optimum damping tuning is decided by comparing the effect of mode control with the magnitude of the viscous damping factor on a basis of the invariable point theory for a SDOF system. The paper shows that the presented structure system is able to hold the viscous damping factors more than 0.15, when the auxiliary stiffness factor defined by the invariable point theory is controlled more than 1/1.5.
