Geodesic
Unsteady bending function for an unlimited anisotropic plate
Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences, Tome 25 (2021) no. 1, pp. 111-126

Voir la notice de l'article provenant de la source Math-Net.Ru

This work is devoted to the study of non-stationary vibrations of a thin anisotropic unbounded Kirchhoff plate under the influence of random non-stationary loads. The approach to the solution is based on the principle of superposition and the method of influence functions (the so-called Green functions), the essence of which is to link the desired solution to the load using an integral operator of the type of convolution over spatial variables and over time. The convolution core is the Green function for the anisotropic plate, which represents normal displacements in response to the impact of a single concentrated load in coordinates and time, mathematically described by the Dirac delta functions. Direct and inverse integral transformations of Laplace and Fourier are used to construct the Green function. The inverse integral Laplace transform is found analytically. The inverse two-dimensional integral Fourier transform is found numerically by integrating rapidly oscillating functions. The obtained fundamental solution allowed us to present the desired non-stationary deflection in the form of a triple convolution in spatial coordinates and time of the Green function with the non-stationary load function. The rectangle method is used to calculate the convolution integral and construct the desired solution. The found deflection function makes it possible to study the space-time propagation of non-stationary waves in an unbounded Kirchhoff plate for various versions of the symmetry of the elastic medium: anisotropic, orthotropic, transversally isotropic, and isotropic. Examples of calculations are presented.
Keywords: non-stationary dynamics, anisotropic material, Green function, non-stationary deflection, Kirchhoff plate, integral transforms, rectangle method, rapidly oscillating functions.
Mots-clés : quadrature formulas 
@article{VSGTU_2021_25_1_a7,
     author = {A. O. Serdiuk and D. O. Serdyuk and G. V. Fedotenkov},
     title = {Unsteady bending function for an unlimited anisotropic plate},
     journal = {Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences},
     pages = {111--126},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VSGTU_2021_25_1_a7/}
}
TY  - JOUR
AU  - A. O. Serdiuk
AU  - D. O. Serdyuk
AU  - G. V. Fedotenkov
TI  - Unsteady bending function for an unlimited anisotropic plate
JO  - Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences
PY  - 2021
SP  - 111
EP  - 126
VL  - 25
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/VSGTU_2021_25_1_a7/
LA  - ru
ID  - VSGTU_2021_25_1_a7
ER  - 
%0 Journal Article
%A A. O. Serdiuk
%A D. O. Serdyuk
%A G. V. Fedotenkov
%T Unsteady bending function for an unlimited anisotropic plate
%J Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences
%D 2021
%P 111-126
%V 25
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/VSGTU_2021_25_1_a7/
%G ru
%F VSGTU_2021_25_1_a7
A. O. Serdiuk; D. O. Serdyuk; G. V. Fedotenkov. Unsteady bending function for an unlimited anisotropic plate. Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences, Tome 25 (2021) no. 1, pp. 111-126. http://geodesic.mathdoc.fr/item/VSGTU_2021_25_1_a7/