A survey of numerical models for hail impact analysis using explicit finite element codes
A survey of numerical models for hail impact analysis using explicit finite element codes
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DOI：
10.1016/j.ijimpeng.2004.06.009
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发表时间：
2005-09
影响因子：
5.1
通讯作者：
M. Anghileri;L. Castelletti;F. Invernizzi;M. Mascheroni
中科院分区：
文献类型：
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作者：
M. Anghileri;L. Castelletti;F. Invernizzi;M. Mascheroni
冰雹冲击对飞机结构（例如前缘和前部）的完整性构成实际威胁。尽管对天气条件的分析减少了飞行路线和冰雹区域之间交叉的发生，但有时穿越冰雹是不可避免的，在这种情况下，飞机结构必须表现出适当水平的对冰雹影响造成的损坏的承受能力。因此，由于实验测试既昂贵又麻烦，开发数值模型非常重要，最终支持高效和防冰雹结构的设计。因此，在本研究中，使用LSTC LS-Dyna，开发了三种冰雹数值模型：有限元、任意拉格朗日欧拉模型和平滑粒子流体动力学模型。最初，这三个模型已根据记录的实验测试进行了验证，随后用于重现冰雹对机舱进气口鼻唇的影响。对三种冰雹模型的优缺点进行了评估，得出的结论是，平滑粒子流体动力学模型对于事件分析是最有效的。
Hailstone impact is an actual threat for the integrity of aircraft structures such as leading edges, and forward sections. Though the analysis of weather conditions reduces the occurrence of intersections between flight routes and hailstorm regions, sometimes the passage through a hailstorm becomes inevitable and, in such a case, it is mandatory that the aircraft structures show an appropriate level of tolerance to damages caused by a hail impact. Therefore, as experimental tests are both expensive and troublesome, it is important to develop numerical models, which eventually support the design of high-efficient and hail-proof structures. Accordingly, in the present research, using LSTC LS-Dyna, three numerical models of hailstone have been developed: finite element, arbitrary Lagrangian Eulerian, and smoothed particle hydrodynamics model. Initially, these three models had been validated referring to a documented experimental test and, subsequently, used to reproduce the impact of a hailstone with the nose-lip of a nacelle intake. Advantages and disadvantages of the three hail models have been evaluated and it has been concluded that the smoothed particle hydrodynamics model is the most efficient and effective for the analysis of the event.