Department of Mechanical Engineering, Auburn University, Auburn, Alabama 36849, USA.
J Acoust Soc Am. 2010 Feb;127(2):829-40. doi: 10.1121/1.3273885.
The sound transmission characteristics of an aluminum panel and two composite sandwich panels were investigated by using two boundary element analyses. The effect of air loading on the structural behavior of the panels is included in one boundary element analysis, by using a light-fluid approximation for the eigenmode series to evaluate the structural response. In the other boundary element analysis, the air loading is treated as an added mass. The effect of the modal energy loss factor on the sound transmission loss of the panels was investigated. Both boundary element analyses were used to study the sound transmission loss of symmetric sandwich panels excited by a random incidence acoustic field. A classical wave impedance analysis was also used to make sound transmission loss predictions for the two foam-filled honeycomb sandwich panels. Comparisons between predictions of sound transmission loss for the two foam-filled honeycomb sandwich panels excited by a random incidence acoustic field obtained from the wave impedance analysis, the two boundary element analyses, and experimental measurements are presented.
采用两种边界元分析方法研究了铝板和两种复合夹层板的声传输特性。在一种边界元分析中，通过采用轻流体近似来评估结构响应，考虑了空气载荷对板结构行为的影响。在另一种边界元分析中，空气载荷被视为附加质量。研究了模态能量损耗因子对板的隔声量的影响。两种边界元分析都用于研究随机入射声场激励下对称夹层板的隔声量。经典波阻抗分析也用于预测两种填充泡沫的蜂窝夹层板的隔声量。给出了波阻抗分析、两种边界元分析和实验测量结果预测的随机入射声场激励下两种填充泡沫的蜂窝夹层板的隔声量之间的比较。
