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KIAM Preprint  10, Moscow, 2019
Authors: Poveschenko Y. A., Krukovskiy A. Y., Podryga V. O., Golovchenko E. N.
Difference schemes of support operator method for equations of elasticity with azimuthal rotation
Abstract:
In the work, for full displacement vectors and velocities, taking into account the azimuthal rotations, on irregular grids with minimal reasonable restrictions for their topological and geometric structure, the approximations of vector analysis operations in cylindrical geometry were constructed with respect to the difference schemes for elasticity theory problems. Taking into account the energy balance of the medium in the presence of azimuthal rotations, families of integrally consistent approximations of vector analysis operations were made, sufficient for discrete modeling of these processes, with respect to the curvature of space caused by the cylindrical geometry of the system. On (r,z)regular grids with differential rotation along the azimuthal coordinate θ, the difference schemes of the support operator method for the equations of the elasticity theory in displacements were constructed and investigated. The considered approximations retain the properties of divergence, self-adjointness and sign-definiteness of differential operators, and are also applicable for solving nonstationary problems of hydrodynamics with allowance for elastic processes.
Keywords:
difference schemes, support operator method, theory of elasticity, cylindrical geometry, azimuthal rotation
Publication language: russian,  pages: 36
Research direction:
Mathematical modelling in actual problems of science and technics
Russian source text:
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About authors:
  • Poveschenko Yuri Andreevich,  orcid.org/0000-0001-9211-9057KIAM RAS
  • Krukovskiy Alexander Yurevich,  orcid.org/0000-0003-4188-6904KIAM RAS
  • Podryga Victoria Olegovna,  orcid.org/0000-0001-7874-6978KIAM RAS
  • Golovchenko Evdokiya Nikolayevna,  orcid.org/0000-0003-0797-4492KIAM RAS