一种用于计算板中缺陷兰姆波散射的混合边界元法  

A Hybrid Boundary Element Method for Lamb Wave Scattering by Defects in Plate

作　　者：刘镇清[1] 贺鹏飞[2] 易勇[1] 

机构地区：[1]同济大学声学研究,上海200092 [2]同济大学固体力学教育部重点实险室,上海200092

出　　处：《力学季刊》2003年第3期334-340,共7页Chinese Quarterly of Mechanics

基　　金：国家自然科学基金(批准号:10074050)

摘　　要：本文介绍了一种将传统边界元法和兰姆波的本征模式函数相结合的混合边界元法,用此方法解决兰姆波在板材中传播时遇到缺陷发生的散射问题,计算了兰姆波通过缺陷后的反射与透射系数。文中给出了若干兰姆波信号幅度与板中不同深度缺陷的相互关系。In this paper, a hybrid boundary element method combined traditional boundary element method with Lamb wave normal mode expansion technique was used to solve the scattering problem of Lamb waves by defect in plate. Both Lamb wave transmission and reflections from defect were calculated. Some numerical relations between the depth of defects and the amplitude of Lamb waves are achieved.

关 键 词：兰姆波 边界元方法 板 缺陷 

分 类 号：O242[理学—计算数学]