各向同性板的声—超声特性

Acousto ultrasonic Characterization of Isotropic Elastic Plate

声—超声技术是近几年发展的评估材料损伤的新技术，笔者在本文探讨了应用该技术于板类构件时一个超声发射换能器与多个超声接受换能器输入—输出的理论分析问题．借助于广义Ｌａｍｂ问题的远场解与波射线追踪方法分析了２个或多个接收换能器置于构件同一表面时延迟时间的计算公式．这为多个接收信号的应力波因子分析。

Acousto ultrasonic technique is a newly developed one to evaluate the damage of composite materials. This paper discusses the theoretical analysis of the input output of an ultrasonic transmitter and two or more receiving transducers,when the technique is applied to isotropic plate. By using far field solution of extensive lambs problem and ray tracing method,the response and the time delay is given. This provides a new conception and a new way of the analysis of stress wave factor, which can be used to evaluate integration and residual strength of materials.