为揭示飞机撞击作用下储油罐的损伤破坏机理并为工程防护措施提供参考，建立了精细化的空客A320飞机和10000m3大型储油罐有限元模型，通过LS-DYNA有限元分析软件对不同位置的撞击全过程进行了数值模拟，分析了储油罐和飞机的动力响应和损伤破坏。结果表明：随着撞击高度的增加，储油罐的损伤破坏程度加重，罐体出现明显的“V”字形褶皱变形并被飞机地板穿透；不同位置处撞击力的时程变化趋势相似，但撞击力峰值有明显差别，其中2m高处的撞击力峰值（约9.62×106N）约为11m高处(约7.13×106N)的1.35倍；不同位置处撞击位移差别较大，其中11m高处的撞击位移峰值(约8.35m)约为2m高处（约0.73m）的11倍；罐体变形在燃油重力作用下部分恢复，并且撞击位置越低恢复程度越大，其中2m高处的恢复程度几乎达到70%。
Abstract
In order to reveal the damage mechanism of the fuel tank under the aircraft impact and providing corresponding references for engineering protection measures, the refined finite element models of aircraft A320 and the large fuel tank of 10000m3 are established, respectively. The process of the impact is simulated by using the commercial finite element software LS-DYNA. Considering different impact positions, dynamic response and damage of the fuel tank and aircraft are analyzed. The results show that: the damage of the fuel tank is more seriously with the increase of impinging height and the impact wrinkle appears like the letter “V” with a hole; the force-time curve trend of different positions is similar, but the peak force is obviously different, for example, the peak force of 2m height(about 9.62×106N) is nearly 1.35 times of the 11m height(about 7.13×106N); the displacement of different positions has significant difference, for example, the peak displacement of 11m height(about 8.35m) is nearly 11 times of the 2m height(about 0.73m); the deformation of the fuel tank recover due to the effect of gravity and the degree is greater with lower impinging position, for example, the degree of recovery is almost 70% at the 2m height position.
关键词
储油罐 /
飞机撞击 /
数值模拟 /
损伤破坏
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Key words
fuel tank /
aircraft impact /
numerical simulation /
damage failure
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