Based on the theory of elastodynamics, the longitudinal guided wave and flexural guided wavegroupvelocity dispersion curves for M22 stud were calculated.
根据弹性动力学理论，采用纵向导波与弯曲导波相结合的方法对螺柱所受轴向应力进行无损检测。
2
The results show that the propagation speed of the wave is not equal to the speed of energy flux, but nearly equal to the real part of the complex groupvelocity.
结果表明，波的传播速度并不等于能流速度，而与复群速度的实部近似相等。
3
The paper studies the concepts of phase velocity and groupvelocity on electromagnetic wave propagation and discusses the relation between signal conveyance and energy conveyance.