CAJ | 학술논문

为了研究周期加筋板的声振特性，在文献所建立的周期加筋板声振理论耦合方程解析表达式的基础上，先给出一种便于编程的数值求解方法，然后研究加强筋间距对周期加筋板声振特性的影响规律。数值结果表明：周期加筋板的横向位移谱中存在3个特征区域；随之加强筋间距增加，周期加筋板的声振特性将趋于平板特性，远场辐射声压(SPL)曲线会向低频段偏移。
위료연구주기가근판적성진특성，재문헌소건립적주기가근판성진이론우합방정해석표체식적기출상，선급출일충편우편정적수치구해방법，연후연구가강근간거대주기가근판성진특성적영향규률。수치결과표명：주기가근판적횡향위이보중존재3개특정구역；수지가강근간거증가，주기가근판적성진특성장추우평판특성，원장복사성압(SPL)곡선회향저빈단편이。
In order to investigate vibroacoustic characteristics of periodically stiffened plates, a conveniently programmed numerical method is developed according to the analytical expression of the vibroacoustic coupling equations of the periodically stiffened plate presented in the literature. With the numerical solutions, effects of the spacing of the stiffeners on the vibroacoustic characteristics of periodically stiffened plate is analyzed. The numerical results show that transverse displacement spectra of the periodically stiffened plate are characterized by three parts and that with the increase of the spacing of the stiffeners, vibroacoustic characteristics of the periodically stiffened plate tend to be identical with those of the uniform plate, meanwhile, the curves of sound pressure level of the far field acoustic radiation shift to the lower frequencies.