典型薄壁结构抗鸟撞动响应试验及数值模拟研究

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (14) : 127-134.

论文

李振华，刘军

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Experimental and numerical simulation study on the bird impact responses of typical thin-walled structures

LI Zhenhua，LIU Jun

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文章历史 +

摘要

设计满足鸟撞适航条款要求的飞机薄壁结构，必须进行典型薄壁结构抗鸟撞动响应试验及数值模拟研究。对某飞机机头上壁板薄壁结构进行了鸟撞试验，并采用光滑粒子流体动力学–有限元法(smoothed particle hydrodynamics–finite element method，SPH–FE)耦合方法，基于商用显式有限元分析软件PAM-CRASH，建立了鸟撞上壁板薄壁结构数值计算模型，计算结果表明，上壁板结构损伤模式主要包括蒙皮撕裂和铆钉断裂，计算结果与试验结果良好的一致性验证了本文数值计算模型及方法的合理性。在此基础上，建立了鸟撞典型薄壁结构数值计算模型，研究了鸟弹不同撞击角度和速度下典型薄壁结构蒙皮极限厚度值，结果表明，随着撞击速度的增大，蒙皮极限厚度的变化对撞击角度十分敏感。拟合了典型薄壁结构蒙皮极限厚度与鸟弹撞击角度和速度之间的数学关系，为飞机薄壁结构抗鸟撞设计提供技术支撑。
关键词：鸟撞；光滑粒子流体动力学–有限元法（SPH–FEM）；薄壁结构；数值模拟；PAM-CRASH

Abstract

In order to design thin-walled aircraft structures that meet the requirements of airworthiness of bird strike, it is necessary to carry out experiments and numerical simulation on the response of typical thin-walled aircraft structures to bird strike. This paper has carried out on a bird strike aircraft nose wainscot thin-walled structure test, and USES the SPH - coupled FEM method, based on the explicit finite element analysis software, commercial PAM - CRASH, established the bird hit the wall thin-walled structure numerical model, and the results show that the wall structural damage fracture model mainly includes skin tear and rivet, good consistency with the test results as demonstrated in this paper, the rationality of the numerical calculation model and method. On this basis, a numerical model of typical thin-walled structures was established, and the ultimate thickness of typical thin-walled structures was studied at different impact angles and velocities of bird projectile. The results show that with the increase of impact velocity, the change of ultimate thickness of the skin is very sensitive to the impact Angle. The mathematical relationship between the ultimate thickness of the skin of a typical thin-walled structure and the impact Angle and velocity of bird projectile is fitted, which provides technical support for the design of anti-bird impact of thin-walled aircraft structure.
Key words: Bird strike; smoothed particle hydrodynamics–finite element method （SPH–FEM）; thin-walled structure ; numerical simulation ;PAM-CRASH

导出引用

李振华，刘军. 典型薄壁结构抗鸟撞动响应试验及数值模拟研究[J]. 振动与冲击, 2022, 41(14): 127-134

LI Zhenhua，LIU Jun. Experimental and numerical simulation study on the bird impact responses of typical thin-walled structures[J]. Journal of Vibration and Shock, 2022, 41(14): 127-134

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