NONLOCAL STABILITY CONDITIONS OF THE "CREST" DIFFERENCE SCHEME FOR I-D GAS DYNAMICS WITH LAGRANDIAN VARIABLES
Yu. A. Bondarenko, V. V. Zmushko, А. M. Stenin VANT. Ser. Metodiki i Programmy Chislennogo Resheniya Zadach Matematicheskoy Fiziki 1984. Вып.3. С. 9-12.
The linearized difference scheme, "Crest", is used to describe a method for obtaining nonlocal and asymptotically exact stability conditions (with a mesh point number tending to infinity) from initial data in the presence of local inhomogeneity in the scheme coefficients. A case of region-by-region computation and that of one small cell, compared to the rest, are considered. Smeared shock wave stability is examined for an artificial quadratic viscosity.
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INVESTIGATING THE DYNAMIC BEHAVIOR OF A THICK SPHERE STRESS STATE UNDER A MOBILE LOADING ON AN EXTERNAL BOUNDARY
T. I. Zmushko, Yu. N. Bukharev VANT. Ser. Metodiki i Programmy Chislennogo Resheniya Zadach Matematicheskoy Fiziki 1984. Вып.3. С. 49-53.
A method of space characteristics is used to study elastic wave propagation and forming the highest stress regions (that is maximum stress rate regions) for a thick sphere which experiences dynamic load on its external surface h = 0,5R, h is the shell thickness, R is the external radius). Die external load is assumed to be determined by two stress tensor components (σrr normal and τkθ tangent) and its application region varies with time. The sphere being studied occupies the Rl≤r≤R, region within the r, θ, φ spherical coordinates, where 0≤θ≤π/2, is uniform, isotropic, and has linearly elastic properties defined by the density, ρ, longitudinal wave velocity, α, and transverse wave velocity, β. Axial symmetry requirements are assumed to be met.
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