纵桁穿过边缘开孔舱壁对环肋圆柱壳水下声辐射特性的影响

摘要

为研究纵桁穿过边缘开孔舱壁对环肋圆柱壳水下声辐射特性的影响，采用结构有限元耦合流体边界元方法，通过FORTRAN和DMAP混合编程处理流体附加质量和附加阻尼，计算在不考虑开孔加强结构的条件下，不同舱壁边缘开孔数量、半径及分布角度的圆柱壳表面均方法向速度级与辐射声功率级频响曲线。结果表明：舱壁边缘开孔分布角度对环肋圆柱壳湿表面均方法向速度级和辐射声功率级的分贝值影响很小，但对两声学衡量指标的峰值数影响明显；边缘开孔数量、半径对两声学衡量指标的分贝值影响明显，且对峰值数影响显著。因此，在设计潜艇舱壁结构时，需合理设置边缘开孔参数。%To investigate the effect of longitudinal beams traversing edge-perforated bulkhead on the under⁃water vibration and acoustic radiation of cylindrical shells, an approach combining the finite element and boundary element is proposed in this paper. Through FORTRAN and DMAP codes, the corresponding fre⁃quency response curves measuring the mean-square velocity and radiated sound power from cylindrical shells with different amount,radiuses,and distribution of holes are obtained,while the stiffened structure near the hole is purposely ignored. The results show that the distribution of holes hardly influences the deci⁃bels of mean-square velocity and radiated sound power, but it has significant impact on the peak numbers of the measuring indicators. On the other hand, the amount and radiuses of holes demonstrate great influ⁃ences on the decibels of the measuring indicators as well as the peak numbers. Therefore, properly arrang⁃ing the parameters of marginal holes is highly recommended in the submarine design.