基于数值方法求解的周期加筋板声振特性研究  

Research on vibroacoustic characteristics of periodically stiffened plates based on numerical solutions

作　　者：胡毅钧[1] 王伟[2] 金叶青[3] 叶梦熊[3] 

机构地区：[1]海军装备部驻沈阳地区军事代表局,辽宁沈阳110031 [2]海军驻431厂军事代表室,辽宁葫芦岛125004 [3]武汉第二船舶设计研究所,湖北武汉430064

出　　处：《舰船科学技术》2015年第6期21-25,共5页Ship Science and Technology

摘　　要：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。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.

关 键 词：周期加筋板 数值方法 横向位移谱 远场辐射声压(SPL) 

分 类 号：U661.44[交通运输工程—船舶及航道工程]