One of the features of a forced oscillation is the energy in the oscillation. 受迫振动的特点之一是振动的能量。
As a numerical example, nonlinear free and forced vibration phenomena of shallow spherical shells with sinusoidal corrugation are studied. 作为算例，研究了正弦波纹扁球壳的非线性自由和受迫振动现象。
Express the differences of displacement variation of a mass subjected by a free damped vibration and a forced vibration, separately. 分别叙述一质量受到无阻尼的振动与强制振动时位移变化的不同。
