一、引言在完全弹性介貭中,弹性波的传播問題已經研究得比較深入,尤其用射綫法来解决波的传播強度問題,有了一套完善的方法。实际上,大地岩层近于粘—弹性介貭,地震波在传播过程中要受到內摩擦的作用,振幅随距离逐漸衰減。衰減規律,現在均根据經驗公式来确定。在理論上,虽然可以通过解波动方程的方法解决这問题,但所得結果,即使极簡单的問題也是十分复杂的。在完全弹性介貭中,也存在同样的情形,但如应用射线法,則变得較为方便。因此,是否可以将射綫法推广到粘—弹性介貭中来,傅承义教授 I. INTRODUCTION In the completely elastic medium, the propagation of elastic waves has been studied in more depth, especially using ray method to solve the problem of wave propagation intensity, with a set of sound methods. In fact, the geologic formation is near the visco-elastic medium, and the seismic waves are subject to internal friction during propagation. The amplitude decays gradually with distance. Decay law, are now based on empirical formula to determine. In theory, although the problem can be solved by solving the wave equation, the results obtained are very complicated, even for very simple problems. The same thing applies to fully elastic media, but it becomes more convenient if a ray method is used. Therefore, whether it is possible to extend the ray method to visco-elastic medium, Professor Fu Chengyi