鸟体姿态对结构抗鸟撞性能的影响

发布时间：2018-05-22 12:08

本文选题：鸟撞 + 鸟体姿态　；参考：《爆炸与冲击》2017年05期

【摘要】：低于现行标准规定能量的大量鸟撞事故中,航空结构仍然发生实质性破坏的情况,说明只考虑鸟体的质量和速度不足以保证飞机安全。本文中针对弹性平板、雷达罩及机翼前缘等飞机典型结构,开展了不同姿态鸟体的鸟撞分析研究。分析结果发现,鸟体姿态对结构的抗鸟撞性能有比较显著的影响,不同的结构特点反映的响应规律也不同:对吸能结构,姿态角越大,吸收的能量越多,被保护的结构就越安全;而对承力结构,姿态角越大,高应力区域越大,结构就越危险。因此,在结构的抗鸟撞安全性评估中,除了完成特定姿态鸟体的鸟撞实验,针对危险工况还应通过数值分析评估不同鸟体姿态的结构撞击响应,进一步确保结构的抗鸟撞能力。
[Abstract]:In a large number of bird collision accidents with energy below the current standard, the actual destruction of the aeronautical structure is still taking place, which shows that it is not enough to consider the mass and speed of the bird body to ensure the safety of the aircraft. In this paper, the bird collision analysis of bird bodies with different attitude is carried out for typical structures such as elastic plates, radome and wing leading edge. The results show that the bird body attitude has a significant effect on the bird collision resistance of the structure, and different structural characteristics reflect different responses: for the energy absorption structure, the larger the attitude angle, the more energy is absorbed. The more secure the protected structure is, the more dangerous the structure is when the attitude angle is larger, the higher the stress area is, the more dangerous the structure is. Therefore, in the safety evaluation of bird collision, in addition to the bird impact experiments of bird body with specific attitude, the structure impact response of different bird body attitude should be evaluated by numerical analysis in order to ensure the bird collision resistance ability of the structure.
【作者单位】：西北工业大学航空学院;中航飞机股份有限公司西安飞机分公司;
【基金】：高等学校学科创新引智计划项目(B07050)
【分类号】：O313.4;V215.2;V328

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