双层加筋圆柱壳在不同舷间连接形式下的声辐射性能分析

ANALYSIS OF SOUND RADIATION OF DOUBLE STIFFENED SHELLS CONNECTED BY DIFFERENT STURCTURES

论文用解析法推导得出了双层加筋圆柱壳的两种舷间连接形式-实肋板和托板的反力表达式,其中实肋板的振动形式分别采用三种振动方程近似表示-考虑板的面内面外振动、仅考虑板的面内振动、仅考虑板的面内准纵波振动,托板的振动形式也分别采用三种振动方程近似表示-考虑板的面内振动、仅考虑板的面内准纵波振动、近似成杆的纵向振动,数值分析对比得出了不同方法的偏差值;并对不同连接方式的双壳声辐射性能进行了比较,得出结论当托板铺满整个环面时,结构与环肋板相似,辐射性能也与环肋板连接相似.

The vibration characteristics of two types of linked structure between outer shell arid inner shell of double stiffened cylindrical shells, namely annular plates and splints, are studied. The annular plates＇ vibration is treated as both extensional and bending vibration, only extensional vibration and only radial vibration, respectively. Moreover, the splints＇ vibration is treated as extensional vibration, only ra- dial vibration and pole＇s vibration, respectively. The comparison of three methods for each structure type shows that different methods have different precision. A conclusion is drawn from the present analysis： the splints linked double shells have similar sound radiation to the annular plate＇s connected ones when splints fully overspread in the circumferential direction.