Compliance optimization of the truss structures

  • Sławomir Czarnecki Warsaw University of Technology

Abstract

The paper discusses the problem of designing the stiffest truss with a given and fixed number of joints and element connections. The design variables are the cross sectional areas of the bars or/and the nodal points locations. In each case a maximal volume of a truss, constituting an isoperimetric unilateral condition is prescribed. The nodal force vector is assumed to be independent of the design variables, hence fixed during the optimization process. The equilibrium problems of the trusses are modeled by the conventional linear as well as nonlinear finite element analyses taking into account large nodal displacements and small deformations of members. New optimal layouts of plane and space trusses are presented. These new layouts are found by using the moving asymptotes algorithm, the simplex method and the optimality criteria method.

Keywords

References

[1] W. Achtziger. Topology Optimization of Discrete Structures: An Introductory Course Using Convex and Nonsmooth Analysis. Advanced School, International Centre for Mechanical Sciences (CISM) , Udine, June 24- 28, 1996.
[2] M. Bendsøe. Optimization of Structural Topology, Shape, and Material. Springer, Berlin, 1995.
[3] M. Crisfield. Non-linear Finite Element Analysis of Solids and Structures. John Wiley and Sons, New York, 1991.
[4] S. Czarnecki. Non-linear stability analysis of the truss structures (in Polish) . Computer Methods in Civil Engineering, 2: 17- 30, 1996.
[5] S. Czarnecki. Topology and shape optimization in the minimum compliance problems for shell bar structures. Lightweight Structures in Civil Engineering. Local Seminar of IASS Polish Chapter, 24- 29, Warsaw- Cracow, December 1, 2000.
Published
Jan 27, 2023
How to Cite
CZARNECKI, Sławomir. Compliance optimization of the truss structures. Computer Assisted Methods in Engineering and Science, [S.l.], v. 10, n. 2, p. 117-137, jan. 2023. ISSN 2956-5839. Available at: <https://cames.ippt.gov.pl/index.php/cames/article/view/1082>. Date accessed: 21 nov. 2024.
Section
Articles