Name
Syromyatnikov Pavel Viktorovich
Scholastic degree
•
Academic rank
—
Honorary rank
—
Organization, job position
Southern Scientific Center
Web site url
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Articles count: 1
The article is dedicated to a numerical investigation of
a plane problem of the oscillation amplitude of a
buried source, depending on the frequency and motion
speed in various isotropic media. Three types of the
medium are considered: a two-layer package with a
rigidly fixed base, a two-layer package with a
mechanically free base, a half-space. The source, in the
form of a stress jump simulating a rigid inclusion of
small dimensions, moves in the interface plane at a
constant speed. Homogeneous boundary value
problems are considered in a moving coordinate
system associated with a source. The solution method
is based on the usage of integral Fourier transforms,
the method of direct contour integration and
algorithms for constructing symbols of Green's
matrices. The method of direct contour integration
significantly simplifies calculations in comparison
with the traditional approaches to the calculation of
Fourier integrals. We have presented calculations of
nine amplitude-frequency and amplitude-velocity
characteristics for different combinations of medium
and source types, that give an exhaustive qualitative
and quantitative description of the solutions for
boundary value problems in a wide range of velocities
and frequencies. Comparative analysis of calculations
showed a primary influence of the type of an elastic
medium on the investigated characteristics, as well as
the large influence of the source type. Which, in turn,
revealed some substantial connections between the
boundary value problems with a moving source and
the corresponding problems with a stationary source