It is revealed that the viscosity effects on the relationship of the amplitudes and wave propagation time with the damage are necessary to consider in the damaged medium.
比较是否考虑粘性时的波幅和波传播时间与损伤的关系，表明粘性是损伤混凝土介质中波传播所必须要考虑的问题。
For the same initial amplitudes, the periods are becoming short, the three waves are gradually becoming instability, and the time of strong interaction is shorting with increasing of wave Numbers.
对于相同的初始扰动振幅，随着波数的增加，低频振荡周期缩短，三波逐渐变得不稳定，三波之间较强的相互作用时间缩短。
Finally, in the context of homogeneous weak discontinuity, the evolution of the amplitudes of acceleration wave is analyzed.
最后考察了均匀弱间断情况下加速度波的波幅演化规律。
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