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Abstract There has a significant impact when the separation bolt is unlocked, therefore to avoid damage to the aircraft structure, the impact energy needs to be absorbed. A cushioning energy absorption device was designed in a limited installation applying the energy absorption principle of the thin-walled cylinder. The cushioning property of thin-walled cylinders with different thicknesses and different impact velocities were analyzed using the finite element method and were verified by the cushion test. The results show that when the aircraft structure is not completely crushed, the thin-walled cylinder performs effectively in cushioning energy absorption, the smaller the wall thickness of the thin-walled cylinder, the better the cushioning effect. The impact velocity has an outstanding correlation with the cushioning property and exhibits a solid nonlinear relationship.
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Received: 28 November 2022
Published: 06 July 2023
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2023, Vol. 6 
