流场中变截面加筋柱壳结构声振特性分析  

Analysis on vibration and acoustic radiation of variable cross-section stiffened cylindrical shell in water

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作  者:王宏[1] 刘贤贺[1] 徐伟[2] 

机构地区:[1]渤海船舶职业学院,辽宁葫芦岛125015 [2]哈尔滨工程大学,黑龙江哈尔滨150001

出  处:《舰船科学技术》2016年第8期29-33,共5页Ship Science and Technology

摘  要:基于传递矩阵法给出了流场中变截面加筋柱壳结构在受集中力和声压作用下振动与声辐射的求解过程,并在确定模态截断算法有效性的基础上开展对结构振动特性的研究,分析了环板-圆柱壳加筋柱壳结构的损耗因子、流体介质、壳体厚度、环肋数目对其声振特性的影响。结果表明,流体介质的存在使结构振动减小,辐射声压增加;损耗因子增加,振动和辐射声压在中高频段降低;壳体厚度增大,壳体的振动响应减小,低频段辐射声压降低,高频段辐射声压交叉波动;环肋数目增加,结构振动减小,在中高频段,辐射声压降低。Base on transfer matrix method, a solution of vibration and acoustic radiation of variable cross-section stiffened cylindrical shell in water under concentrated force and sound pressure was given. After availability of module truncation algorithm was confirmed, the research on vibration and acoustic radiation of the structure was carried out. The influence on vibration and acoustic radiation of the ring plate-cylindrical shell stiffened cylindrical shell structure was analyzed when the dissipation factor, fluid medium, shell thickness and number of ring stiffeners of the structure were changed. The results shown that the structural vibration was reduced and acoustic radiation pressure was increased when the fluid medium was existed; the vibration and acoustic radiation pressure were reduced at medium-high frequencies when the dissipation factor was increased; the vibration response of the shell was reduced with the thickness increased, and acoustic radiation pressure was reduced at the low frequencies, acoustic radiation pressure was cross fluctuations at high frequencies; the structure vibration was reduced with the ring stiffener number increased and the acoustic radiation pressure was reduced at high frequencies.

关 键 词:变截面加筋柱壳 传递矩阵 振动 声辐射 

分 类 号:TB532[理学—物理]

 

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