具有弱界面的柱状复合结构中轴对称声导波  

AXISYMMETRIC GUIDED WAVES IN CYLINDRICAL COMPOSITE STRUCTURES WITH WEAK INTERFACES

作　　者：杜光升[1] 王耀俊[1] 袁忆丰[1] 赵庆昌 

机构地区：[1]南京大学声学研究所近代声学国家重点实验室

出　　处：《物理学报》1998年第1期27-34,共8页Acta Physica Sinica

基　　金：国家自然科学基金;江苏省自然科学基金

摘　　要：利用柱状分层结构中轴对称声导波的波动方程和界面“弹簧”模型，导出了具有弱界面的双层柱状复合结构中轴对称声导波的广义色散方程，计算了刚性联接和滑移联接界面时双层复合管（腔壁为自由界面或腔内充水）和双层复合棒中轴对称声导波的色散特性，分析了弱界面的轴向劲度系数对低阶轴对称声导波的影响．Abstract Using the “spring” model for a weak interface and the wave equations in cylindrical composite structures, we derive the generalized frequency equation for axisymmetric guided waves in a two layered cylindrical composite structure with a weak interface. Numerical computations are made for dispersion characteristics of the axisymmetric guided waves in two layered composite tubes(with or without water in hollow) and clad rods with rigid or slip interfaces. The influence of the shear stiffness of the weak interface on the lower order guided wave modes is studied.

关 键 词：声导波 轴对称 弱界面 柱状复合结构 波动方程 

分 类 号：O422[理学—声学]