CAJ | 학술논문

由均匀各向同性或复合材料制成的圆柱壳体内沿周向和轴向传播的弯曲波会合成螺旋波,在壳体的声辐射问题中扮演重要角色.文章是对作者在以往关于多层复合壳体声辐射研究的扩展[5].通过数值结果,分析了因周期加强环存在在螺旋波谱云图上的周期分布的亮点,该周期分布亮点归因于Mace和Burroughs所揭示的波数转换效应;同时讨论了因复合材料铺设角变化而引起的螺旋波谱形状在云图中的转动.
유균균각향동성혹복합재료제성적원주각체내연주향화축향전파적만곡파회합성라선파,재각체적성복사문제중분연중요각색.문장시대작자재이왕관우다층복합각체성복사연구적확전[5].통과수치결과,분석료인주기가강배존재재라선파보운도상적주기분포적량점,해주기분포량점귀인우Mace화Burroughs소게시적파수전환효응;동시토론료인복합재료포설각변화이인기적라선파보형상재운도중적전동.
For flexural waves traveling in circumferential and axial directions of cylindrical shells, which are constructed by uniformly isotropic or composite materials, they have a resultant effect, namely, in-ducing helical waves, which are known in playing an important role at the acoustic radiation from the cylindrical shells. This paper is an extension of authors' previous investigation on the acoustic radia-tion from laminated composite shells. The periodically spaced bright points due to the presence of the periodic reinforcing rings in the contour plot of the helical wave spectra are analyzed by utilizing numerical results. And the rotation of the configuration of the helical wave spectra in the contour plot, due to the change of the ply angles of composite materials, are also addressed.