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Physics · 术语表

什么是 Damped oscillations？

又称： damping · pseudo-period

Definition 28.12 High School Physics · 第 28 章 — Mechanical Oscillators and the Measurement of Time

Friction drains mechanical energy from every real oscillator: its free oscillations are damped. Under light damping the system still oscillates, with a dying amplitude but a nearly unchanged repeat time, the pseudo-period, close to $T_0$ ; under heavy damping (honey) it creeps back to equilibrium without ever overshooting; the energy, proportional to amplitude squared, decays into heat.

Undamped and lightly damped oscillations: nearly the same period (2.0\, s here), the damped amplitude dying inside a shrinking exponential envelope (dashed). — Undamped and lightly damped oscillations: nearly the same period ( $2.0\,\mathrm{s}$ here), the damped amplitude dying inside a shrinking exponential envelope (dashed).

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