Transient reaction of an elastic half-plane on a source of a concentrated boundary disturbance

11th International Conference on "Mesh methods for boundary-value problems and applications"

Okonechnikov, A.S.^1 ; Tarlakovski, D.V.^1,2 ; Ul'Yashina, A.N.^1 ; Fedotenkov, G.V.^1

Moscow Aviation Institute (National Research University), Russia^1

Lomonosov Moscow State University, Moscow, Russia^2

关键词: External disturbances;    Governing equations;    Influence functions;    Integral transformations;    Nonstationary process;    Quadrature formula;    Superposition principle;    Surface influences;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/158/1/012073/pdf
DOI  :  10.1088/1757-899X/158/1/012073

来源: IOP

【 摘 要 】

One of the key problems in studying the non-stationary processes of solid mechanics is obtaining of influence functions. These functions serve as solutions for the problems of effect of sudden concentrated loads on a body with linear elastic properties. Knowledge of the influence functions allows us to obtain the solutions for the problems with non-mixed boundary and initial conditions in the form of quadrature formulae with the help of superposition principle, as well as get the integral governing equations for the problems with mixed boundary and initial conditions. This paper offers explicit derivations for all nonstationary surface influence functions of an elastic half-plane in a plane strain condition. It is achieved with the help of combined inverse transform of a Fourier-Laplace integral transformation. The external disturbance is both dynamic and kinematic. The derived functions in xτ-domain are studied to find and describe singularities and are supplemented with graphs.