Comparing different fidelity models for the impact analysis of large commercial aircrafts on a containment building
Comparing different fidelity models for the impact analysis of large commercial aircrafts on a containment building
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DOI：
10.1016/j.engfailanal.2015.08.002
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发表时间：
2015-11-01
影响因子：
4
通讯作者：
Lin, Li
中科院分区：
文献类型：
--
作者：
Lu, Xinzheng;Lin, Kaiqi;Lin, Li
利用CATIA、Hypermesh和LS-DYNA建立了三种不同几何尺寸的波音767飞机有限元模型。利用LS-DYNA软件模拟了这些模型对刚性墙和安全壳厂房的冲击。仿真结果表明，在低速碰撞情况下，不同模型的冲击力和冲击冲量的时间历程存在较大差异。随着撞击速度的增加，撞击力的时程与安全壳结构的损伤时程趋于相似。此外，只有当高保真度模型以高速撞击安全壳厂房时，才会发生对安全壳厂房后侧的撞击。过于简化的飞机模型会低估冲击载荷，并导致与高保真模型不同的失效模式。在撞击模拟中应考虑飞机的内部结构。该研究为进一步研究飞机对安全壳建筑物的撞击提供了参考。(C)2015爱思唯尔有限公司版权所有。
Three Boeing 767 finite element models with different fidelities are built using CATIA, Hypermesh and LS-DYNA in this study. The impacts of these models on a rigid wall and a containment building are simulated with LS-DYNA. The simulation results show that the time histories of the impact forces and impulses differ significantly among these models for the low-speed impact case. With the increase of the impact velocity, the time histories of impact forces and the damage of the containment building become similar. Moreover, the impact on the back side of the containment building will occur only when the high fidelity model impacts the containment building with a high velocity. The over-simplified aircraft models will underestimate the impact load and induce a different failure mode compared to the high fidelity model. The internal structures of an aircraft should be accounted for in the impact simulation. This investigation provides a reference for further studies of aircraft impacts on containment buildings. (C) 2015 Elsevier Ltd. All rights reserved.