基于Snell定律的射线追踪程序实现及模拟计算
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摘要
对基于Snell定律的射线追踪方法进行了研究并编程实现.鉴于追踪过程中根的变化范围较大,采用对分法求根克服了迭代法对迭代初始值的依赖性.通过二次射线追踪实现了对介质中存在超低速区的最短路径追踪,并对混凝土介质中常见的几种速度模型进行了模拟计算,结果表明该方法直观,能够追踪到最短路径,更接近于超声波的实际传播路径.
The ray_tracing method that based on the law of Snell is studied and realized in a program. Since the variation range of root is large in the process of ray_tracing,half_separated method was utilized to remove the dependence of iterative initial value. The shortest paths of the lowest ultrasonic velocity areas that existed in a medium were traced by the second ray_tracing method. Several common velocity models of concrete were simulated with a program realized in VB. It shows that this method is very straightforward and can trace the shortest path, and the tracing path is more close to ultrasonic propagating path.
引文
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