The problem of reducing the effect of fluid mobility on the motion of a body partially filled with a fluid is solved. For the mathematical description of the problem, a variational approach with elements of nonlinear mechanics and ideas of the method of modal decomposition of system variables is used. This approach makes it possible to determine analytically the internal forces of interaction between the fluid and the walls of the tank. The proposed control method is based on the idea of compensating the interaction of the fluid with the structure by controlling this force. This approach was tested against various control problems (for short-term and harmonic perturbations). Now, the capabilities of the method are tested against various initial perturbations of the free surface fluid. The obtained results indicate the small effect of such initial perturbations on the motion of the structure under the chosen control. The perturbation of the fluid and the interaction of the fluid with the tank walls is reduced compared to the case of uncontrolled motion, and the laws of their change are less different from sinusoidal. The proposed approach is based on the analytical properties of a specific nonlinear dynamic model of the combined motion of the structure with a fluid.
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Translated from Prykladna Mekhanika, Vol. 58, No. 4, pp. 85–95, July–August 2022.
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Sirenko, O.O., Limarchenko, O.S. & Hubs’ka, V.V. Effect of Initial Perturbations of the Fluid on the Efficiency of Control of a Moving Carrying Body. Int Appl Mech 58, 445–454 (2022). https://doi.org/10.1007/s10778-022-01169-8
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DOI: https://doi.org/10.1007/s10778-022-01169-8