Aluminium Foam Sandwich (AFS) panels are a type of structural configuration in which two aluminium thin layers enclose a core made of foamed aluminium. Both the metallic characteristic of the matrix and the foam porosity lead to a remarkable combination of properties which range from high specific stiffness to thermal and acoustic isolation. However, these characteristics, depending on core properties as foam density, pores morphology, type and size of gas bubbles, are obtained by means of a manufacturing process that is not fully controlled. Thus, in order to reduce the financial and temporal costs of the campaign of experimental tests needed for completely understanding the properties and potentialities of AFS panels, similitude methods can be used so that scaled-down models can be tested in place of the full-scale structure. In this work, the similitude conditions and scaling laws of Alulight® AFS panels with two different boundary conditions (simply supported and free-free) are derived and validated. In particular, two different sets of conditions are derived: the first by expliciting all the geometrical and material properties, the second by combining some parameters into just one with physical meaning, the bending stiffness. The analysis in similitude is addressed towards the prediction of vibroacoustic properties such as natural frequencies, Frequency Response Function (FRF) and radiated acoustic power. Both models in complete and partial similitude are investigated. While the former allow to reconstruct the vibroacoustic characteristics of the prototype, the latter does not. Furthermore, it is proved that it is possible to derive a simplified set of similitude conditions if many parameters are gathered into just one parameter with physical meaning.

铝泡沫三明治（AFS）面板是一种结构配置，其中两个铝薄层包围着由泡沫铝制成的内芯。基质的金属特性和泡沫孔隙率都导致了从高比刚度到隔热和隔音的各种性能的显着结合。然而，这些特征取决于诸如泡沫密度，孔的形态，气泡的类型和大小的核心性质，是通过未完全控制的制造工艺获得的。因此，为了减少完全了解AFS面板的特性和潜力所需的实验测试活动的财务和时间成本，可以使用相似性方法，以便可以对按比例缩小的模型进行测试以代替全面模型结构体。在这项工作中 推导并验证了具有两种不同边界条件（简单支持和自由约束）的Alulight®AFS面板的相似条件和缩放定律。特别是，导出了两组不同的条件：第一组通过明确所有的几何和材料特性，第二组通过将某些参数组合为仅一个具有物理意义的参数，即弯曲刚度。相似性分析的目的是预测诸如自然频率，频率响应函数（FRF）和辐射声功率等振动特性。研究了完全相似和部分相似的两种模型。尽管前者允许重建原型的振动声特性，但后者不允许。此外，