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

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Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (14) : 127-134.

LI Zhenhua，LIU Jun

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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

Key words

Bird strike / smoothed particle hydrodynamics–finite element method （SPH–FEM） / thin-walled structure / numerical simulation ;PAM-CRASH

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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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