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本文分析了静止媒质中的声波定律是否适用于运动媒质系统,结论是:静止媒质中的平面声波传播方程适合于以任何可能速度运动的运动媒质,而Snell的声波定律则不适用于运动媒质系统。文中还讨论和分析了入射超声、反射超声和折射超声之间的能量分配比例。稳定行波定向超声声束每单位时间各自传播的能量和媒质系统中所吸收的能量与媒质系统的运动速度无关。一个入射定向超声脉冲及其在媒质运动系统中所产生的诸次级定向超声脉冲的能量则较静止媒质为大,但能量分配的比例与媒质系统的运动速度无关。
In this paper, we analyze whether the law of acoustic wave in stationary medium is suitable for a moving medium system. The conclusion is that the plane acoustic wave propagation equation in stationary medium is suitable for moving medium moving at any possible speed, while Snell’s acoustic law is not suitable for moving medium system . The paper also discusses and analyzes the energy distribution ratio between incident ultrasound, reflected ultrasound and refraction ultrasound. The energy propagated per unit time and the energy absorbed in the medium system of a stable traveling wave-oriented ultrasonic beam have nothing to do with the speed of the media system. The energy of an incident-directed ultrasonic pulse and its sub-directional ultrasonic pulses generated in a media motion system is larger than that of a stationary media, but the energy distribution ratio is independent of the speed of the media system.