Open Access
ARTICLE
A Unified Dimensionless Parameter for Finite Element Mesh for Beams Resting on Elastic Foundation
Ping Lou1, 2, ∗, Xinlei Zhang1, F. T. K. Au3, Zixian Zhang1, Yi Huang1
1 School of Civil Engineering, Central South University, Changsha, China.
2 Key Laboratory of Heavy Railway Engineering Structure of Education Ministry, Central South University, Changsha, China.
3 Department of Civil Engineering, University of Hong Kong, Hong Kong, China.
* Corresponding Author: Ping Lou. Email: .
Computer Modeling in Engineering & Sciences 2020, 122(3), 955-969. https://doi.org/10.32604/cmes.2020.08302
Received 13 August 2019; Accepted 13 December 2019; Issue published 01 March 2020
Abstract
Discretising a structure into elements is a key step in finite element (FE)
analysis. The discretised geometry used to formulate an FE model can greatly affect
accuracy and validity. This paper presents a unified dimensionless parameter to generate
a mesh of cubic FEs for the analysis of very long beams resting on an elastic foundation.
A uniform beam resting on elastic foundation with various values of flexural stiffness and
elastic supporting coefficients subject to static load and moving load is used to illustrate
the application of the proposed parameter. The numerical results show that (a) Even if the
values of the flexural stiffness of the beam and elastic supporting coefficient of the elastic
foundation are different, the same proposed parameter “
s” can ensure the same accuracy of
the FE solution, but the accuracy may differ for use of the same element length; (b) The
proposed dimensionless parameter “
s” can indeed be used as a unified index to generate the
mesh for a beam resting on elastic foundation, whereas the use of the same element length
as a criterion may be misleading; (c) The errors between the FE and analytical solutions for
the maximum vertical displacement, shear force and bending moment of the beam increase
with the dimensionless parameter “
s”; and (d) For the given allowable errors for the
vertical displacement, shear force and bending moment of the beam under static load and
moving load, the corresponding values of the proposed parameter are provided to guide
the mesh generation.
Keywords
Cite This Article
Lou, P., Zhang, X., T., F., Zhang, Z., Huang, Y. (2020). A Unified Dimensionless Parameter for Finite Element Mesh for Beams Resting on Elastic Foundation.
CMES-Computer Modeling in Engineering & Sciences, 122(3), 955–969. https://doi.org/10.32604/cmes.2020.08302