Coupled spring oscillators. First normal mode of oscillation.

Coupled spring oscillators. Second normal mode of oscillation.

Coupled spring oscillators. Beating effect.

Resonant spring oscillator. Parametric excitation of oscillation. The energy of vertical oscillation is transferred to energy of ball swinging and back.

Coupled oscillators. In the process of coupled oscillations, energy is transferred between the individual oscillators. As a result the amplitude of oscillation is periodically changed.

5 coupled spring oscillators hang on a common beam which in turn can also oscillate on two springs. This beam plays a role of the conductor of the vibrating energy from the central oscillator to the lateral ones and back. As a result we see that the oscillation of a central ball periodically rises and fades.