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| Crash Worthiness of a Civil Aircraft in Different Ground Environments |
| Received:October 26, 2024 Revised:November 21, 2024 |
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| DOI：10.7643/issn.1672-9242.2025.02.003 |
| KeyWord:civil aircraft crashworthiness passenger safety structural failure ground environment aircraft design |
| Author | Institution |
| FENG Zilong |
Nanjing University of Aeronautics and Astronautics, Nanjing , China |
| ZHU Shuhua |
Nanjing University of Aeronautics and Astronautics, Nanjing , China |
| HUI Xulong |
Aircraft Strength Research Institute of China, Xi'an , China |
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| Abstract: |
| The work aims to study the crashworthiness of civil aircraft in different ground environments. With the mid body section of a certain type of civil aircraft as the research object, a finite element analysis model of the mid body section containing aviation seats and dummies was established based on the dynamic simulation software LS-Dyna. Three typical ground environments, rigid, soft, and hard, were selected for a finite element simulation analysis of civil aircraft crashes. From the aspects of body structure damage, ground energy absorption, and cabin passenger damage, the worthiness of civil aircraft to different crash environments was systematically studied. The results indicated that the higher the stiffness of the ground environment, the more severe the impact damage of civil aircraft, and the energy absorbed by the ground was positively correlated with its deformation. Under a 6.1 m/s impact, due to the damage to the cargo hold and the absorption of impact energy by ground deformation, there was no danger of exceeding the damage threshold for the occupants inside the cabin. Among them, the passenger had the highest degree of lumbar injury and the lowest degree of femoral injury. This type of civil aircraft has good crash resistance at an initial speed of 6.1 m/s, and there are no serious injuries to the passengers inside the cabin. The lower the ground stiffness, the better the absorption effect of impact energy, and the better the crashworthiness of civil aircraft. For passengers in the cabin, the overall damage to the window side dummy is lower than that of the corridor side dummy. |
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