The use of 3D printing to produce acoustic panels with good mechanical and acoustic properties was investigated in this paper. Various fiber layups of the fiberglass face sheet and core designs were fabricated and tested for their indentation resistance and acoustic absorption performance. It was found that the bidirectional face sheet layup exhibited the best indentation energy absorption recording 4.2 J, which is 37% more than the 45-degree layout and 66% more than the quasi-isotropic layup. The specific energy absorption of the hybrid honeycomb core is the best among the three core designs recording 404 J/kg, which is 56% higher than the corrugated triangle with horizontal beam core (359 J/kg) and 20% higher than double ellipse core (335 J/kg). Computed-Tomography (CT) scan was used to study the fracture behavior of the sandwich structures. It was found that the bidirectional layup exhibited a different failure mode as compared to the 45-degree and quasi-isotropic layup. In terms of the acoustic properties, the face sheets with various layup patterns have a low acoustic absorption coefficient with minimal differences from each other at low frequencies (500 Hz–3000 Hz) and have higher absorption coefficients with greater differences from each other at frequencies between 3000 Hz–6500 Hz. The absorption curve was significantly affected by the design of the core. The orientation of the core also comes into play if the core is asymmetrical. The hybrid honeycomb sandwich structure was the optimal structure among the three designs for balanced indentation resistance and acoustic insulation.

本文研究了使用 3D 打印生产具有良好机械和声学性能的吸音板。玻璃纤维面板和芯设计的各种纤维叠层被制造并测试了它们的抗压痕性和吸声性能。结果表明，双向面板叠层表现出最好的压痕能量吸收记录 4.2 J，比 45 度布局高 37%，比准各向同性叠层高 66%。混合蜂窝芯的比能量吸收是三种芯设计中最好的，记录为 404 J/kg，比带水平梁的波纹三角形芯（359 J/kg）高 56%，比双椭圆芯高 20% (335 焦耳/公斤)。计算机断层扫描 (CT) 扫描用于研究夹层结构的断裂行为。发现与 45 度和准各向同性叠层相比，双向叠层表现出不同的失效模式。在声学特性方面，具有不同叠层图案的面板在低频（500 Hz-3000 Hz）下吸声系数较低，彼此之间的差异很小，并且吸声系数较高，在之间的频率下彼此差异较大。 3000 赫兹–6500 赫兹。吸收曲线受核心设计的显着影响。如果核心是不对称的，核心的方向也会起作用。混合蜂窝夹层结构是三种设计中平衡抗压痕和隔音的最佳结构。