纵波质点的运动与界面的反射

The movement of longitudinal-wave particle and the reflection of interface

在原有波动学的基础上,通过对波传播质点的运动和作用进行研究,提出了波传播的力学作用不仅有因形变产生的应力,还存在着另一种由速度决定的不同形式的力———“动作用力”.动作用力才是波传播的根本动力.由“动作用力"和形变应力确立波的动力学方程,由这个方程,又可确定质点的运动规律.质点在波传播中一般并不作弹性振动,质点沿一个方向运动进行能量传递后,只作微弱的回复运动.质点这种运动特点才符合能量守恒.质点这种运动特点决定不同的界面性状有不同形态的反射波.

Based on the existed wave mechanics and by means of the study of the motion and effect of particles in the propagation of waves, this article puts forward that mechanics＂ effect in the propagation of waves is not only comprised of ＂stress from deformation＂ but also of another different form of force ＂applied force from motion＂ which is decided by velocity. The ＂applied force from motion＂ is the essential motive force in the propagation of waves. The two forces together can establish a mechanics＂ equation, by means of which the motion law of particle can be confirmed. Particles in the propagation of waves does not conduct elastic vibration but conduct only feeble for-and- backward motion after passing on energy to one direction. Such a motion feature of particles is in conformity with the principle of the conservation of energy. Such a motion feature of particles also determines that interface of different nature and state has different forms of reflecting waves.