| Citation: | ZHAO Yunke, LIU Peiqing. Numerical study on maximum impact load during aircraft ditching on wave surface[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(5): 1025-1037. doi: 10.13700/j.bh.1001-5965.2020.0556(in Chinese)
|
This paper uses numerical methods to study the magnitude of the maximum impact load on the fuselage and its physical cause during the compulsory landing of the wave. In the numerical calculation, the finite volume method and Volume of Fluid (VOF) method are used to capture the free surface. The Six-Degree-of-Freedom (6DOF) model and the Global Motion Mesh (GMM) are used to process the relative motion between water and the aircraft, and simulate the forced landing process of the aircraft. By selecting the wavefront phase of the aircraft that has the maximum sinking speed relative to the water surface as the position of the forced landing water contact, the ultimate impact load on the fuselage is predicted. The results show that during the water-impacting stage of the wavy surface, the fuselage encounters an unforeseen impact peak on a calm water surface, and the magnitude of the impact peak is related to the sinking speed of the aircraft relative to the water surface. This paper also compares the movement attitude and overload change history of aircraft forced landing under five different wave height sea conditions, and gives the influence rules of wave height on the maximum impact load and the peak values of other parameters, which provides a reference for the design of aircraft load distribution.
| [1] |
PATEL A A, GREENWOOD J R P.Transport water impact and ditching performance: DOT/FAA/AR-95/54[R].Washington, D.C.: Galaxy Scientific Corp Pleasantville, 1996.
|
| [2] |
THOMSON R G, CAIAFA C.Structural response of transport airplanes in crash situations: DOT/FAA/CT83/42[R].Washinton, D.C.: Federal Aviation Administration Technical Center Atlantic City, 1983.
|
| [3] |
VON KARMAN T.The impact of seaplane floats during landing: NACATN321[R].Washington, D.C.: NACA, 1929.
|
| [4] |
WAGNER H.Phenomena associated with impacts and sliding on liquid surfaces[J].Journal of Applied Mechanics, 1932, 12(4):193-215. http://www.zhangqiaokeyan.com/ntis-science-report_other_thesis/020711235357.html
|
| [5] |
DOBROVOL'SKAYA Z N.On some problems of similarity flow of fluid with a free surface[J].Journal of Fluid Mechanics, 1969, 36(4):805-829. doi: 10.1017/S0022112069001996
|
| [6] |
GREENHOW M.Wedge entry into initially calm water[J].Applied Ocean Research, 1987, 9(4):214-223. doi: 10.1016/0141-1187(87)90003-4
|
| [7] |
ZHAO R, FALTINSEN O.Water entry of two-dimensional bodies[J].Journal of Fluid Mechanics, 1993, 246:593-612. doi: 10.1017/S002211209300028X
|
| [8] |
ZHAO R, FALTINSEN O, AARSNES J.Water entry of arbitrary two-dimensional sections with and without flow separation[C]//Proceedings of the 20st Symposium on Naval Hydrodynamics.Washington, D.C.: The National Academies Press, 1997: 408-423.
|
| [9] |
MCBRIDE E E, FISHER L J.Experimental investigation of the effect of rear-fuselage shape on ditching behavior: TN 2929[R].Washington, D.C.: NACA, 1953.
|
| [10] |
魏飞, 许靖锋.飞机模型水上迫降试验测控系统设计[M]//褚林堂, 叶树林, 译.北京:航空工业出版社, 2011:383-391.
WEI F, XU J F.Design of measurement and control system for forced landing test on airplane model[M]//CHU L T, YE S L, translated.Beijing:Aviation Industry Press, 2011:383-391(in Chinese).
|
| [11] |
蒲锦华, 张科, 魏飞, 等.摄像测量技术在飞机模型水上迫降试验中的应用[C]//2017年(第三届)中国航空科学技术大会论文集(下册).北京: 中国航空学会, 2017: 340-345.
PU J H, ZHANG K, WEI F, et al.Application of camera measurement technology in forced landing test on aircraft model[C]//Proceedings of the 2017(3rd) China Aviation Science and Technology Conference (Volume 2).Beijing: Chinese Society of Aeronautics and Astronautics, 2017: 340-345(in Chinese).
|
| [12] |
XU G D, DUAN W Y, WU G X.Numerical simulation of water entry of a cone in free-fall motion[J].Quarterly Journal of Mechanics and Applied Mathematics, 2011, 64(3):265-285. doi: 10.1093/qjmam/hbr003
|
| [13] |
XIAO T, QIN N, LU Z, et al.Development of a smoothed particle hydrodynamics method and its application to aircraft ditching simulations[J].Aerospace Science and Technology, 2017, 66:28-43. doi: 10.1016/j.ast.2017.02.022
|
| [14] |
CHENG H, MING F R, SUN P N, et al.Towards the modeling of the ditching of a ground-effect wing ship within the framework of the SPH method[J].Applied Ocean Research, 2019, 82:370-384. doi: 10.1016/j.apor.2018.09.014
|
| [15] |
HUA C, FANG C, CHENG J.Simulation of fluid-solid interaction on water ditching of an airplane by ALE method[J].Journal of Hydrodynamics, 2011, 23(5):637-642. doi: 10.1016/S1001-6058(10)60159-X
|
| [16] |
STRECKWALL H, LINDENAU O, BENSCH L.Aircraft ditching:A free surface/free motion problem[J].Archives of Civil and Mechanical Engineering, 2007, 7(3):177-190. doi: 10.1016/S1644-9665(12)60025-9
|
| [17] |
GUO B D, LIU P Q, QU Q L, et al.Effect of pitch angle on initial stage of a transport airplane ditching[J].Chinese Journal of Aeronautics, 2013, 26(1):17-26. doi: 10.1016/j.cja.2012.12.024
|
| [18] |
QU Q L, HU M X, GUO H, et al.Study of ditching characteristics of transport aircraft by global moving mesh method[J].Journal of Aircraft, 2015, 52(5):1550-1558. doi: 10.2514/1.C032993
|
| [19] |
HIRT C W, NICHOLS B D.Volume of fluid (VOF) method for the dynamics of free boundaries[J].Journal of Computational Physics, 1981, 39(1):201-225. doi: 10.1016/0021-9991(81)90145-5
|
| [20] |
MUZAFERIJA S.A two-fluid Navier-Stokes solver to simulate water entry[C]//Proceedings of 22nd Symposium on Naval Architecture.Washington, D.C.: National Academy Press, 1999: 638-651.
|
Figures(27)
Copyright © Journal of Beijing University of Aeronautics and Astronautics
Address: Editorial Department of Journal of Beijing University of Aeronautics and Astronautics, 37 Xueyuan Road, Haidian District, Beijing Post Code: 100191 Email: jbuaa@buaa.edu.cn
Supported by:
Beijing Renhe Information Technology Co., Ltd.
DownLoad:
