Prof. Pennung Warnitchai of Asian Institute of Technology (AIT), Thailand explains the phenomenon of resonance amplification of dynamic response of structures using a simplified mode (often referred to as the Boss Model).

The resonance is a phenomenon resulting in large amplification of oscilations which occurs when the frequency of a periodically applied force is same as the natural frequency of the system on which it acts. When an harmonic force is applied at a resonant frequency of a system, it will oscillate at a higher amplitude than when the same force is applied at any other frequency.