The phase velocity basically tells you how fast a pure sine wave ( with a single frequency ) moves 相速度可以告诉我们一个纯正弦波的传播速度。
And those waves have to travel at exactly the speed of light , which was too suspicious to be a coincidence 而且这些波的传播速度正是光的速度,这并不是巧合
According to phenomena observed during total solar eclipse , it can be pointed out that the velocity of gravitational field wave is equal to the velocity of light in vacuo 摘要据日全食时的现象能够得出:在真空中,引力波的传播速度和光波的传播速度相等。
Expressions are first established for c ( w ) and a ( w ) in terms of the fourier transforms of the wave shapes after two distances of travel . this is the general solution of the problem 首先在对两个传播距离不同的波进行傅立叶变换后,建立波的传播速度c ( w )和材料的衰减系数a ( w )两个项的表达式,得出问题的一般结论。
Any homogeneous viscoelastic medium subjected to one - dimensional tension and compression can be characterized in terms of the phase velocity c ( w ) and the attenuation coefficient deduce the complex modulus and the other equivalent viscoelastic functions 一维的纵向压缩波在同质的粘弹性介质中传播时,材料的粘弹性特性主要通过纵向波的传播速度c ( w )和衰减系数a ( w )两项来定义。
Furthermore using the variation principle in the elasticity , the wave - motion equation is derived in the finite deformation elastic thin rod with viscous and transverse inertia effects , and the characteristic curves and their characteristic relations are obtained by characteristic line method , and the influence of viscous and geometrical - dispersive effects on the propagation of wave is analyzed 再利用弹性力学中的变分原理,导出了同时计及粘性和横向惯性效应时的弹性细杆的几何非线性波的波动方程,用特征线法得到它的特征线和特征线上的相容关系,分析了粘性耗散和几何弥散效应对波的传播速度的影响。