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Acta Armamentarii ›› 2025, Vol. 46 ›› Issue (5): 240289-.doi: 10.12382/bgxb.2024.0289

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Hydrodynamic Response of Amphibious Aircraft Taxiing Based on S-ALE Numerical Pooling

WEI Jiaqing1, PENG Xiangfu1, WU Bin2, JIANG Ting2, WANG Mingzhen2, YANG Yang1,*()   

  1. 1 School of Aeronautics, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, China
    2 Key Aviation Scientific and Technological Laboratory of High-Speed Hydrodynamic, China Special Vehicle Research Institute, Jingmen 448035, Hubei, China
  • Received:2024-04-15 Online:2025-05-07
  • Contact: YANG Yang

Abstract:

Amphibious aircraft inevitably suffers from the hydrodynamic impact of waves and other complex sea conditions during taxiing on the water surface, and in serious cases, the fuselage structure may be deformed and destroyed, which threatens the safety of airframe and aircrew. The structured arbitrary Lagrange-Euler (S-ALE) method is used to investigate the hydrodynamic response of amphibious aircraft during taxiing on a wavy water surface by taking a domestic large-scale amphibious aircraft as the research object. A coupled fluid-structure simulation method based on S-ALE and penalty function contact algorithm is established, and a numerical wave pool is generated and simulated by using the physically imitated push-plate wave-making mode and the mass-damped wave dissipation method, and the hydrodynamic characteristics and wave resistance of the aircraft during taxiing on calm and wavy surfaces are investigated, respectively. The results show that the S-ALE method can effectively simulate the dynamic response of amphibious aircraft taxiing on water surface; the attitude angle of aircraft taxiing at a steady speed of 19.4m/s under a wave height of 1.2m is 7°, and the corresponding resonance wavelength is two or three times of the fuselage length. When the ratio of the airplane fuselage to the wavelength is 1, the vertical overload becomes bigger and bigger under the environment of 1.8m wave height, and will gradually converges under the wave height of 1.2 m. While the changes of the wave height have no obvious effect on the pitch and heave of the aircraft.

Key words: amphibious aircraft, numerical wave-making, structured-arbitrary Lagrange-Eulerian, seakeeping, fluid-structure coupling

CLC Number: