One of the features of a forced oscillation is the energy in the oscillation. 受迫振動的特點之一是振動的能量。
As a numerical example, nonlinear free and forced vibration phenomena of shallow spherical shells with sinusoidal corrugation are studied. 作為算例，研究了正弦波紋扁球殼的非線性自由和受迫振動現象。
Express the differences of displacement variation of a mass subjected by a free damped vibration and a forced vibration, separately. 分別敘述一質量受到無阻尼的振動與強制振動時位移變化的不同。
