A Time-Domain Finite Element Formulation for Transient Dynamic Linear Elasticity

- Journal title : Transactions of the Korean Society of Mechanical Engineers A
- Volume 25, Issue 4, 2001, pp.574-581
- Publisher : The Korean Society of Mechanical Engineers
- DOI : 10.22634/KSME-A.2001.25.4.574

Title & Authors

A Time-Domain Finite Element Formulation for Transient Dynamic Linear Elasticity

Sim, U-Jin; Lee, Seong-Hui;

Sim, U-Jin; Lee, Seong-Hui;

Abstract

Transient linear elastodynamic problems are numerically analyzed in a time-domain by the Finite Element Method, for which the variational formulation based upon the equations of motion in convolution integral is newly derived. This formulation is implicit and does not include the time derivative terms so that the computation procedure is simple and less assumptions are required comparing to the conventional time-domain dynamic numerical algorithms, being able to get the improved numerical accuracy and stability. That formulation is expanded using the semi-discrete approximation to obtain the finite element equations. In the temporal approximation, the time axis is divided equally and constant and linear time variations are assumed in those intervals. It is found that unconditionally stable numerical results are obtained in case of the constant time variation. Some numerical examples are given to show the versatility of the presented formulation.

Keywords

Transient;Dynamic Elasticity;Finite Element Method;Elastic Wave;

Language

Korean

Cited by

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