Study on the double transmission of ultrasonic waves through statistic rough surfaces

• 来源期刊: 声学学报（英文版）
• 学科: 工学
• 年，卷（期）: 2002,（2）
• 页码范围: 153-160
• 页数: 8页
• 分类号: TB5
• 语种: 英文

摘要

A model evaluating the signal loss of the double transmitted acoustic beams through random rough surfaces was established based on the Fresnel approximation and phasescreen approximation. A simple analytical solution was achieved using the exponential substitution approach to remove the nonlinear integral terms. The factors that affect the signal of double transmissions from random rough surfaces were analyzed. The research results demonstrated that the signal loss is not only related to the root-mean-squire height of the roughness,but also to the distance of wave traveling in the materials. The model can be very helpful for improving the reliability of NDT (Non-Destructive Testing).