双粗糙界面的超声反射和透射  

REFLECTION AND TRANSMISSION OF ULTRASONIC WAVES FROM DOUBLE ROUGH SURFACES

作　　者：陈自强[1] 梅林[2] 王裕文[2] 陈立功[1] 倪纯玲[1] 

机构地区：[1]上海交通大学材料科学与工程学院,上海200030 [2]西安交通大学机械工程院,西安710049

出　　处：《机械强度》2001年第1期98-101,共4页Journal of Mechanical Strength

摘　　要：基于相屏近似理论 ,研究了随机双粗糙界面的超声波反射和透射 ,建立了声波斜射双粗糙界面的信号损失工程计算模型。模型中将两次通过粗糙界面的相位相关因子表达成深度及角度的函数 ,克服了以往单纯利用相屏近似进行单层粗糙界面的斜射双透射声波信号衰减计算的局限与不足。理论和实验吻合。Based on Phase-Screen approximation, the reflection and transmission of ultrasonic waves from double random rough surfaces are investigated, and a model suitable for engineering applications to evaluate the signal loss of the wave propagating through double random rough surfaces for oblique incidence was set up. Because the phase correlation factor of the beam transmitting twice the rough surfaces was expressed into the function of flaw depth and incidence angle of beam, the model overcomes the limitation and inadequacy of conventional model, which uses only the phase-screen approximation to evaluate the signal loss for oblique incidence. Theory is in well agreement with experiment results.

关 键 词：粗糙界面 超声波 反射 透射 信号 超声检测 

分 类 号：TB553[理学—物理]