This research presents a numerical study on vibro-acoustic and sound transmission loss behavior of an aluminum honeycomb core sandwich panel with fabric-reinforced graphite (FRG) composite face sheets. The sandwich theory, which assumes the honeycomb core as an orthotropic structural layer, is applied to investigate the free and forced vibration behavior of the panel. The radiated sound power from the panel is quantified by Rayleigh integral method, and the random diffuse field as an incident sound source is derived based on finite element method with the employment of ACTRAN. A validation between the simulated results and the experimental data published is carried out to demonstrate the accuracy and reliability of the present approach. The comparison between different materials of honeycomb sandwich structures illustrates the advantages of the fabric-reinforced graphite honeycomb sandwich structure over the other types of sandwich structures considered. The effects of different boundary conditions and honeycomb structural geometry properties on the acoustical performance of the stiffness of the FRG panel are also investigated. The approach of the present research provides useful guidance for evaluating and selecting the other honeycomb sandwich panels when the vibratory and acoustic behaviors of the panels are considered.

本研究对具有织物增强石墨 (FRG) 复合面板的铝蜂窝芯夹芯板的振动声学和声音传输损失行为进行了数值研究。夹心理论假设蜂窝芯为正交各向异性结构层，用于研究面板的自由和受迫振动行为。面板辐射声功率采用瑞利积分法量化，随机扩散场作为入射声源，采用有限元法，利用ACTRAN推导出。对模拟结果和公布的实验数据进行了验证，以证明本方法的准确性和可靠性。蜂窝夹层结构不同材料之间的比较说明了织物增强石墨蜂窝夹层结构相对于其他类型的夹层结构的优势。还研究了不同边界条件和蜂窝结构几何特性对 FRG 板刚度的声学性能的影响。当考虑面板的振动和声学行为时，本研究的方法为评估和选择其他蜂窝夹芯板提供了有用的指导。还研究了不同边界条件和蜂窝结构几何特性对 FRG 板刚度的声学性能的影响。当考虑面板的振动和声学行为时，本研究的方法为评估和选择其他蜂窝夹芯板提供了有用的指导。还研究了不同边界条件和蜂窝结构几何特性对 FRG 板刚度的声学性能的影响。当考虑面板的振动和声学行为时，本研究的方法为评估和选择其他蜂窝夹芯板提供了有用的指导。