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<p>The motion of liquid with the free surface in the aircraft wing tank under harmonic excitation for a wide frequency range has been considered. Nonlinear problem statement is studied accounting for both translational and rotational motions of the tank. In separate cases of excitation, it has been established that the amplitudes of liquid wave motion during horizontal translational and rotational motion of the tank are highest in the vicinity of the resonant frequency of the first antisymmetric normal mode of free-surface oscillation (forced oscillation mechanism). In the case of vertical oscillations of the tank, the liquid oscillations are considerably greater and occur in the vicinity of double frequency of oscillations by the first antisymmetric normal mode (parametric oscillation mechanism).</p>

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Dynamics of Liquid in Aircraft Wing Tanks Under Various Wing Oscillations

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • S. V. Kopylov,
  • O. S. Limarchenko

摘要

The motion of liquid with the free surface in the aircraft wing tank under harmonic excitation for a wide frequency range has been considered. Nonlinear problem statement is studied accounting for both translational and rotational motions of the tank. In separate cases of excitation, it has been established that the amplitudes of liquid wave motion during horizontal translational and rotational motion of the tank are highest in the vicinity of the resonant frequency of the first antisymmetric normal mode of free-surface oscillation (forced oscillation mechanism). In the case of vertical oscillations of the tank, the liquid oscillations are considerably greater and occur in the vicinity of double frequency of oscillations by the first antisymmetric normal mode (parametric oscillation mechanism).