界面层对层状各向异性复合结构中Lamb波的影响  

The influence of interface layer characteristics on Lamb waves in layered anisotropic media

作　　者：张海燕[1] 刘镇清[2] 马小松[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072 [2]同济大学声学所,上海200092

出　　处：《物理学报》2003年第10期2492-2499,共8页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :10 0 74 0 50 )资助的课题~~

摘　　要：建立了各向异性界面层的弹簧模型 ,并将其应用于分析层状复合媒质的全局矩阵技术中 .其引入的机理是全局矩阵的程序结构、各层矩阵的排列不至于遭受大的破坏 .因此 ,把弹簧界面作为一个“材料层” .该层的材料常数用劲度常数来描述 ,其层厚为零 .把该层放在全局矩阵适当的位置而使系统中的其他层不发生任何变化 .数值示例显示了刚性联接、滑移联接、完全脱层三种不同界面条件下双层各向异性复合结构中Lamb波的频散特征 。In this paper, the spring model for the anisotropic interface layer is built and introduced to the global matrix technique that is popularly used for analyzing layered composites. In introducing the spring interface condition, the philosophy adopted is to incorporate it with a minimum disruption to the program structure, particularly the assembly of the global matrix. The spring interface has therefore been introduced as a 'material layer'. This layer has material constants which govern the stiffness across it and has zero thickness. The layer can be built into the appropriate location in the global matrix without making any changes in the other layers of the system. Numerical computations for the Lamb wave dispersion curves in two-layered anisotropic composite media with different interface conditions including rigid connection, slip connection, and complete disbond are made, and plots of the through-thickness particle displacement distributions of Lamb modes for the rigid bond interface and slip bond interface are compared.

关 键 词：各向异性界面层 弹簧模型 全局矩阵 劲度常数 层状各向异性复合结构 弹性波 LAMB波 频散特征 超声检测 

分 类 号：O347.4[理学—固体力学] TB302.5[理学—力学]