摘要
结合推导层状复合媒质各界面刚性联接时声导波频散特性方程的传递矩阵方法 ,以及滑移界面边界条件和弱界面“弹簧”模型 ,分别导出了超薄层状复合媒质中存在不同深度弱界面、滑移界面和脱层情况下声导波的广义频散方程 ,分析了三种联接界面的深度对低模式声导波频散特性的影响 .
In conjunction with the transfer matrix techniques for modeling ultrasonic wave in multilayered composite medium, the spring model for a weak interface and the interface condition of the slip interface, we have the generalized frequency equations for low\|order mode guided waves in ultra\|thin layered composites structure with a weak or slip interface in different depth, and the effect of the depth of the interface on the dispersion properties of low\|order mode ultrasonic Lamb wave are analyzed. The “ultra\|thin” here means that the thickness of the plate is only a fraction of the ultrasound wavelength so that the echoes from the front and the back of the surface cannot be separated in the time domain.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2000年第7期1297-1302,共6页
Acta Physica Sinica
基金
国家自然科学基金! (批准号 :6963 10 2 0 )
美国OfficeofNavalResearch (GrantNo .0 0 0 14 93 1 0 3 4 0 )资助
