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Dynamic Instability of Shallow Shells Interacting with a Three-Dimensional Potential Gas Flow

To study the interaction of a vibrating shallow shell with a three-dimensional subsonic gas flow, we deduce a system of hypersingular integral equations for the aerodynamic derivatives of the pressure drop. This system of equations is convenient for the solution of the problems of aeroelasticity. We solve the system of hypersingular integral equations by using a numerical approach based on the discrete vortex method. To model vibrations of shallow shells, we deduce a system of ordinary differential equations with the help of the assumed-mode method. We also perform the numerical investigation of dynamic instability of the equilibrium state of a shallow shell in the subsonic gas flow.

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Correspondence to K. V. Avramov.

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Translated from Matematychni Metody ta Fizyko-Mekhanichni Polya, Vol. 61, No. 4, pp. 130–143, October–December, 2019.

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Avramov, K.V. Dynamic Instability of Shallow Shells Interacting with a Three-Dimensional Potential Gas Flow. J Math Sci 256, 518–535 (2021). https://doi.org/10.1007/s10958-021-05442-y

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  • DOI: https://doi.org/10.1007/s10958-021-05442-y

Keywords

  • hypersingular integral equations
  • dynamic instability of shells
  • gas flow