驻波能量探究

Probe into standing wave energy

以固体中传播的横波为例 ,从能量的角度论证了相邻波节、波腹间的总能量守恒 ,任一波节、波腹间、一对“对应”位置间的总能量守恒 ;从能量密度的角度论证了在整个弹性介质中无数“对应”位置间流出和流入的能量净值是不随时间变化的 ,从而得出驻波不存在能量的定向传播。并讨论了驻波在相邻波节与波腹之间能量的转化过程。

Taking the transverse waves transmittes in solid substances for and example,the essay first expounds and proves the conservation of energy between any wave hand and the wave belly nest to it,between any wave band and any wave belly and between any 2corresponding positions and them,from the aspect of energy density,explains that the net amount of the energy flowing in and out doesn't vary wity time between any 2 corresponding positions in the whole elastic medium,thus concluding that there is no oriented travel of energy in standing waves.Besides,the essay discloses the process of energy transformation between any wave band and the wave belly next to it.