Benha University

Taha Hussein Abd Allah Mohamed

Lecturer

Faculty of Engineering, Shoubra Engineering Mathematics and Physics

Efficient Fundamental Solution Based Finite Element for 2-D Dynamics

Engineering Analysis with Boundary Elements • 2023
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Publication Information
Authors Elsayed M. Elsheikh, Taha H.A. Naga, and Youssef F. Rashed
Keywords Finite element method; Fundamental solution; Variational method; Elasticity; Dynamics
Journal Engineering Analysis with Boundary Elements
Publisher ELSEVIER
Volume 148
Issue Not Available
Pages 376-388
publication.type International
Paper Link Open Link
Supplementary Materials Not Available
Abstract
In this paper, an efficient finite element is developed for the dynamic analysis of 2-D elasticity problems. Unlike
the conventional direct or indirect formulations, the proposed integral equation is based on minimizing the
relevant energy functional. In doing so, variational methods are used. The proposed element stiffness matrix is
obtained by a modified hybrid displacement variational statement, taking the fundamental solution as a trial
function. Quadratic shape functions are used for the approximation of the boundary variables. To avoid singularities,
the source points are located outside the problem domain. The element mass matrix is computed using
the relevant element shape functions. Only four Gauss points are needed for accurate computation of the domain
integral related to the mass matrix computation. The proposed element is applicable for: free vibration, forced
vibration, and harmonic analysis as demonstrated by the presented numerical examples. The obtained results are
very promising, and the accuracy level is excellent.
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