Nonlinear mathematical model of hydrodynamics of a rigid bearing surface gliding on an incompressible weightless fluid with oscillations

Authors
DOI:
https://doi.org/10.34169/2414-0651.2025.3(47).43-51
Keywords:
Array, Array, Array, Array, Array, Array, Array
Abstract

The paper presents a nonlinear mathematical model for studying the hydrodynamics of a rigid bearing surface gliding on an incompressible weightless liquid with oscillations in the process of gradual motion. The mathematical model was developed for further studies to assess the loads on the wetted surface of the fuselage of transport category aircraft in contact with a water surface during an emergency landing. The problem is to be solved in a nonlinear steady-state formulation using the wing analogy and will allow, along with the total loads, to obtain distributed loads to assess the strength of the structure in the investigated mode. The basic mathematical relations for obtaining the desired values, the general methodology and features of the numerical implementation of the proposed mathematical model are presented. The presented methodology allows studying hydrodynamic characteristics in the presence of flow asymmetry and angular velocities. As an example, numerical calculations are carried out and the obtained hydrodynamic characteristics of a gliding bearing surface at low subsonic speeds in the presence of an angular pitching speed are presented.

Author Biography
  1. Olexandr Rasstrygin, Central Scientific Research Institute of Armament and Military Equipment of the Armed Forces of Ukraine

    Doctor of Technical Sciences, Professor

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Kanishchev, V., Rasstrygin, O., Varsegov, A., & Isaienko, O. (2025). METHOD FOR CALCULATING THE HYDRODYNAMIC CHARACTERISTICS OF A CIRCUIT PLANNING ON THE UNDISTURBED SURFACE OF AN INCOMPRESSIBLE, WEIGHTLESS FLUID AT LOW SUBSONIC SPEEDS. Weapons and Military Equipment, 46(2), 22–28.

https://doi.org/10.34169/2414-0651.2025.2(46).22-28

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Published
2025-09-30
Issue
Vol. 47 No. 3 (2025): Weapons and military equipment
Section
NAVY ARMAMENT & EQUIPMENT
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Copyright (c) 2026 Олександр Расстригін,Вадим Каніщев

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How to Cite

Nonlinear mathematical model of hydrodynamics of a rigid bearing surface gliding on an incompressible weightless fluid with oscillations. (2025). Weapons and Military Equipment, 47(3), 43-51. https://doi.org/10.34169/2414-0651.2025.3(47).43-51

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