(iii) System modification

A large number of methods exist in this group including detuning, decoupling, using additive damping treatments ( constrained and unconstrained ), stiffeners and massive blocks (as foundation)

Consider the motion of the following single degree of freedom (SDOF) system:

(I) At low frequency the vibration is:

Stiffness controlled

(II) Near resonance, the vibration is

Damping Controlled

(III) Aat high frequency, the vibration is

Inertia Controlled