核爆炸产生的声重波在地球大气中的传播

PROPAGATION OF ACOUSTIC-GRAVITY WAVE FROM NUCLEAR EXPLOSIONS IN THE EARTHS ATMOSPHERE

以往声重波在地球大气中传播的研究,多为将大气分成许多个等温层,利用边界条件联系各层中的声重波参量,而在同一等温层中,忽略了声速随高度(温度)的变化.本文在前人工作的基础上,提出了线性分层的模式.考虑了同一层中声速随高度的变化对声重波的影响,计算了声重波相速度与群速度随周期变化的曲线,并与前人的结果进行了比较,得出了较好的数值结果.

Until now,in numerical calculation of the propagation speed of Acoustic-Gravity Waves in a stratified atmosphere,the variation of the acoustic velocity against altitude has been neglected.In the present paper this factor has been taken into consideration.The complex vertical temperature structure of the atmosphere is regarded as a e number of isothermal layers.The phase and group velocities are obtained.A comparison is made between these solutions and those of the former authors.