船用栅格构型夹层板隔声特性研究

Sound insulation characteristics of marine grid configuration sandwich plate

本文利用声学有限元法系统研究了米字型栅格构型夹芯板的隔声特性,将铝板隔声量的软件计算结果与理论进行对比从而验证仿真的正确性,进一步分析阻尼损耗因子、芯层厚度、芯层壁厚以及面板厚度对隔声性能的影响规律,研究结果表明改变面板厚度、夹层高度、夹层壁厚对隔声性能的优劣有重要影响,并通过控制质量和体积与普通矩形栅格夹芯板对比,得出米字型栅格比矩形栅格构型有着更优的隔声性能,该研究结果可为船舶噪声控制提供参考依据。

In this paper,we systematically study the sound insulation characteristics of the sandwich plate with star type by acoustic finite element method.We compare the theoretical results with the simulation results by aluminum plate,and the result is confirmed.Next we study the influence of damping loss factor,core layer thickness,core layer thickness and panel thickness.The results show that the sound insulation performance is related to the panel thickness,core layer height and core layer wall thickness.We ensure the same quality and volume to analyze the ordinary rectangular grid sandwich panel.It is concluded that the plate with star type has better sound insulation performance than the rectangular grid configuration.The results can provide a reference for ship noise control.