【摘要】 将强迫力分解成超前位移π／２和与位移同相或反相的两个分量．通过对两分力作功的定量计算，可以方便地讨论受迫振动中的能量转换，并能对共振现象作出较清晰的物理解释．更多还原

【Abstract】 The imposed force is decomposed into two components of π/2 advanced one and co-phase or anti-phase one and calculate the works done separately, the clearer physical explanation to the resonance phenomen can be made.更多还原