Formulações e métodos de solução na análise não-linear de treliças espaciais

The main objective of this work is to examine the numerical performance of the Total Lagrangean and Updated Lagragean formulations for geometrically and materially nonlinear analysis of space trusses, and the most commonly used nonlinear equation solution algorithms. These formulations, and two others; are implemented in the ANALITE program. The Total Lagrangean and Updated Lagrangean formulations are developed based on general principles of continuum mechanics. They make possible the nonlinear analysis of large displacements and large deformations. The structure is discretizeted by the finite element method, using the displacement model. The solution of the nonlinear equation system can be carried out by several incremental procedures: Newton iteration type (Newton-Raphson and modified Newton-Raphson), conventional incremental, improved incremental, first-order self-correcting incremental, and some numerical integration techniques (fourth-order Runge-Kutta and Hamming's predictor-corrector). Several examples comparing the different possibilities of the program are presented and commented.

Grantor dc:publisher

Universidade Federal do Rio de Janeiro

Year dc:date.issued

1978

Author dc:creator

• Codes, Rodrigo Amaral de

Advisor dc:contributor.advisor

• Ebecken, Nelson Francisco Favilla

• Análise não-linear de estruturas
• Treliças

Statement dc:rights

• Acesso Aberto

Language dc:language

por

Handle dc:identifier.uri

http://hdl.handle.net/11422/2951

OAI identifier oai:identifier

oai:pantheon.ufrj.br:11422/2951