【摘要】 以截面积为S密度ρ为的棒中沿相反方向传播的简谐横波叠加成的驻波为例,论证了驻波能量分布曲线和能流密度曲线都与驻波曲线相似.若将相邻波腹和波节间的各质元称为一段,分析表明,只有同一段中有能量转换和转移,且在半个周期内的能流密度等于零.这说明驻波中无单一方向的能流.更多还原

【Abstract】 This paper focused on the standing wave formed by superposition of harmonic shear waves which propagated along the rod( the cross sectional area of S,the mass density of ρ)in opposite directions. It demonstrated that the standing wave energy distribution curve and energy flow density curve were both similar as standing wave curve. If the matter element between adjacent wave loop and wave nodes was called a segment,the conversion and transfer of energy only occurred in the same segment,and the average energy flow density was equal to zero within half a cycle. The results showed that there was no single direction energy flow in standing wave.更多还原