Dynamic response analysis of a large commercial aircraft hitting the AP1000 containment vessel
- Publication Type:
- Journal Article
- Citation:
- Zhendong yu Chongji/Journal of Vibration and Shock, 2022, 41, (10)
- Issue Date:
- 2022-05-28
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| Filename | Description | Size | |||
|---|---|---|---|---|---|
| Dynamic response analysis of a large commercial aircraft hitting the AP1000 containment vessel.pdf | Published version | 1.49 MB |
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Since the event of "9•11", 2001, the protection of nuclear power plants against the impact of large commercial aircraft has been a hot issue in the field of nuclear safety. Using ANSYS/LS-DYNA software, the refinement finite element models of a Boeing 737 MAX 8 and a AP1000 containment vessel were established. The accuracy and validity of the finite element modelling of the plane hitting were validated by using the Riera method. Five different initial impact velocities (100 m/s, 150 m/s, 200 m/s, 250 m/s and 300 m/s) and five different impact heights (39 m, 30 m, 47 m, 54 m and 65 m) in the plane hitting process were taken into account in the numerical simulation. The time history of the impact force and kinetic energy of the aircraft, the dynamic response of the steel containment, the equivalent stress distribution and the local damage of the aircraft were studied and analyzed. The research results show that the engine's contribution to the aircraft impact force is about 3-4 times of that of the front of the fuselage; the peak impact force on the steel tube body in the equivalent beam segment is larger, than that on other segments, the largest one is up to 171% of the latter (at the rate of 300 m/s); the junction part of the containment cylinder body to the dome is the most dangerous position, where the penetrated sizes are greater than those at other locations, the largest penetrated size in ring direction is 29.68 m, and that in vertical direction is 17.86 m. The dome in all conditions are not damaged. The equivalent steel beam segment can withstand the aircraft impact very well. When the impact velocity of the aircraft is greater than 150 m/s, the influence range of the equivalent steel plate stress in the impact area of the containment vessel decreases with the increase of initial impact velocity, and the distribution range of the equivalent steel plate stress in the impact area of the equivalent beam segment is larger than that of the non-equivalent steel beam segment. The research results provide reference to the safety assessment and design of similar nuclear island containment vessels against aircraft impact.
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