![]() ![]() Harmonic oscillators occurring in a number of areas of engineering are equivalent in the sense that their mathematical models are identical (see universal oscillator equation above). This effect is different from regular resonance because it exhibits the instability phenomenon. Suppose a function of time has the form of a sine wave function, y (t) A. simple harmonic motion (SHM), in which some physical quantity varies sinusoidally. ![]() Parametric excitation differs from forcing, since the action appears as a time varying modification on a system parameter. One of the most important examples of periodic motion is. Parametric resonance occurs in a mechanical system when a system is parametrically excited and oscillates at one of its resonant frequencies. ![]()
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