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Numerical Study of a Transport Aircraft Wing Impact with a Birch Tree

机译：运输飞机机翼撞击桦树的数值研究

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Assessment of the crashworthiness of the aircraft structure like the wing is important. Nowadays, the finite-element (FE) analysis is widely used in this area. Also, the numerical simulation can aid air crash investigation to exclude some unreasonable reasons. In this work, finite-element models of the wing and slat structures are generated including skin, spars, stringers, and ribs. In every scenario with various fidelity of the mesh of the wing, material model of the birch, and the impact location, the front spar of the wing cut through the tree and the upper part of the tree fell in the direction of the movement of the airplane. The damage to the wing is localized on the leading edge and front spar, while the structural integrality of the wing is maintained. The impact with the birch tree cannot cause significant damage to the wing. This paper exhibits the methodology of modeling and simulating the wing impact against the tree to assess its crashworthiness and explore the possible reason for the accident.
机译：评估飞机结构（如机翼）的耐撞性非常重要。目前，有限元分析在这一领域得到了广泛的应用。此外，数值模拟可以帮助空难调查排除一些不合理的原因。在这项工作中，生成了机翼和板条结构的有限元模型，包括蒙皮、翼梁、纵梁和肋。在每个场景中，机翼网格、桦树材料模型和撞击位置的保真度各不相同，机翼的前翼梁穿过树，树的上部朝飞机运动的方向坠落。机翼的损伤集中在前缘和前翼梁上，同时保持机翼的结构完整性。与桦树的撞击不会对机翼造成重大损坏。本文展示了机翼撞击树木的建模和模拟方法，以评估其耐撞性，并探讨事故的可能原因。

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