弹性介质中平面P波通过弹性夹层时的传播特性

摘要

With the aid of theory on wave propagation and Snell theorem, atheoretical study is presented on propagation characteristics of plane wave when it passes through layered elastic medium. Exact solution of dynamic equation is derived. The curves which represent the relations between transiting wave amplitude and medium parameters and incident angle are obtained by numerical computation. The results show that transiting wave amplitude is dependent on not only medium parameters but also interlining thickness and incident angle.%运用波的传播理论及Snell定律研究了平面P波通过弹性层状介质时的传播特性，求得波动方程的解析解，在此基础上利用数值计算绘出了反射﹑透射系数与介质参数及入射角的关系曲线。结果表明透射系数不仅与介质参数有关，而且与夹层厚度和入射角有关，严格控制夹层厚度和入射角可获得满意的隔振效果，为屏障隔振理论在工程中的应用提供了理论基础。