基于声辐射特性分析的舱壁边缘开孔参数优化设计研究

为满足潜艇设计整体性、实用性和技术性要求,结构组、管路组及机电组等需对特殊舱壁边缘进行开孔处理.为研究舱壁边缘开孔对潜艇水下振动和声辐射特性的影响,以两舱段环肋圆柱壳为研究对象,采用结构有限元耦合流体边界元方法,通过FORTRAN和DAMP混合编程,计算了在不考虑开孔加强结构条件下不同开孔位置、开孔数目及开孔大小的圆柱壳水下辐射声功率曲线,得到基于声辐射特性的开孔参数优化方案,为潜艇舱壁结构设计提供合理依据.

Research on parameters optional design of edge-perforated bulkhead based on analysis about acoustic radiation characteristic

In order to meet the submarine design requirements of overall integrity ,usefulness and technicalities, struc-ture, pipeline and electromechanical departments etc. need to cut holes on the edge of some special bulkhead. To investigate the effect of holes on the edge of bulkhead on underwater acoustic radiation of submarine, taking double stiffened cylinders as research objects, an approach combining the finite element and boundary element was adopted. Through FORTRAN and DMAP codes, the corresponding frequency response curves measuring the radiated sound power level from cylindrical shells with different amount, radiuses, distribution of holes were obtainedyet the structural strength near the hole was ignored. Para-meters optimization scheme of edge-perforated bulkhead based on analysis about acoustic radiation characteristic were ob-tained, offering reasonable basis for structural design of submarine bulkhead.