飞机绝热隔声层分布方式对壁板隔声量的影响

摘要

运用传递矩阵法分析民用飞机绝热隔声层不同分布方式对机身整体壁板隔声性能的影响.计算和比较在机身蒙皮和内饰板材料物理参数不变、两板之间距离不变条件下,绝热隔声层不同分布状态下的壁板的隔声性能.以该研究为基础,设计人员可以针对不同隔声要求和机身结构采用不同的绝热隔声层的设计方案.%The thermal/acoustic insulation blankets of the airplanes are very important components in commercial aircraft design. In this paper, the influence of the layout of the thermal/acoustic insulation blankets on the transmission loss was analyzed by means of the transfer matrix method. With the constant physical parameters of the skin and the internal decorative materials and the constant gap between the adjacent blankets, the sound insulation performances of the thermal/acoustic insulation blankets for different layouts were calculated and comparatively analyzed. The results obtained can provide some help in acoustic design for selecting the optimal layout of the thermal/acoustic insulation blankets for different fuselages of airplanes.