The paper shows the directions to improve the assessment of the external load on a rigid structure during the crash of an aircraft. Our estimates describe the modeling of initial stage of impact (deformation of the nose compartment). The main goal is to evaluate the correctness and applicability of the Riera approach to mechanical equivalent of onboard equipment. Volume-perforated samples of the aluminum alloy D16T were used as mechanical equivalents in numerical and experimental studies. Both our model which uses constitutive equations of high-porous elastoplastic medium (Carroll-Holt model) and direct 3D modeling of the structure of volume-perforated samples by finite element method in the LS-DYNA allows us to obtain the history of load on a rigid wall. We demonstrate the features and differences between this approaches and the Riera approach.

本文展示了改进飞机坠毁期间刚性结构外部载荷评估的方向。我们的估计描述了冲击初始阶段（鼻腔变形）的建模。主要目标是评估 Riera 方法对机载设备的机械等效性的正确性和适用性。铝合金 D16T 的体积穿孔样品在数值和实验研究中用作机械等效物。我们的模型使用高孔弹塑性介质的本构方程（Carroll-Holt 模型）和在 LS-DYNA 中通过有限元方法对体积穿孔样品的结构进行直接 3D 建模，都可以让我们获得载荷的历史刚性墙。我们展示了这种方法与 Riera 方法之间的特征和差异。