法兰及材料不连续对充液壳能量流传播的影响

Effects of Flanges and Material Discontinuities on Energy Flow Propagating in the Fluid-Filled Cylindrical Shell

运用结构振动的波动方法对有限长的、采用法兰连接的材料不连续区域在充液圆柱壳中的能量流传播进行了研究。考察了法兰结构参数的影响。数值结果表明 :法兰截面高度和宽度对于 n=0 ,1阶周向模态弯曲波的较低频成份影响不大。而对于 n=0 ,1阶的弯曲波在较高频区域和 n≥ 2的弯曲波在整个频域上都有较大的影响 ;当存在一个不连续区域时 。

The propagation characteristics of vibration energy flow in fluid-filled circular cylindrical shell with flange-connected finite region of material discontinuity are investigated by wave motion approach. The effects of flanges' structural parameters are examined extensively. The result shows that the height and width of flanges' cross section have little effects on n=0, 1 circumferential waves at low frequency. The effects are grave on n=0,1 waves at high frequency and on n greater than or equal 2 waves ab both low and high frequency. With only one region in the pipeline of shell, the effects of the region's length on the energy flow are examined.