对弹性介质中任一质元的运动分析

平面谐波在弹性介质中传播时,有关介质中质元的运动情况,一般书中都没有作比较详细讨论。这样容易使一些读者在学习过程中产生一些疑问。本文将介质元在其平衡位置附近的振动与振动中所讨论的谐振动作了比较和分析,并对介质元的振动是否是作稳定的受迫振动这一问题,提出作者的一些看法。

Analysis on the Motion of any Material Element in the Elastic Medium

There is no discussion about it in detail in the general physics works that how the material element moves in the relevant mediums while the plane simple harmonic wave is propagating in the elastic medium so some questions are often raised by the readers. In this article,a comparasion and analysis are made about the vibration of the material element and the simple harmonic vibration. And some opinions are suggested by the author about whether the material element vibration is a steady forced vibration.