Dynamic Absorber Using Lever and Pendulum Mechanism for Vibration Control of Structure : The Method of Deciding Parameters for the System

A new dynamic absorber system using lever and pendulum mechanisms was proposed for controlling the displacement of high-rise structures, and its optimum tuning condition was determined by the uncoupled frequency ratio of mass of the system to main mass and critical damping ratio. However, the decided frequency and damping ratio are a function of four parameters, such as three mass ratios and a lever ratio. In this report, the determination of these parameters is treated as a nonlinear minimization problem having constrained and is solved by using the SUMT method. Finally, the optimum combination of the parameters in this system is obtained, and the characteristics of this system are discussed in physical meaning.