Space Truss
Mostrando 1-11 de 11 artigos, teses e dissertações.
-
1. Optimization of geometrically nonlinear truss structures under dynamic loading
Abstract The goal of this article is to present the formulation of the optimization problem of truss structures with geometric nonlinearity under dynamic loads and provide examples of this problem. The formulated optimization problem aims to determine the cross-sectional area of the bars that minimizes the weight of the structure, imposing constraints on nod
REM, Int. Eng. J.. Publicado em: 2020-09
-
2. Modeling the creep behavior of GRFP truss structures with Positional Finite Element Method
Abstract This paper presents the development of a formulation, based on Positional Finite Element Method, to describe the viscoelastic mechanical behavior of space trusses. The numerical method used was chosen due to its efficiency in the applications concerning nonlinear numerical analyses. The formulation describes the positional variation over time under
Lat. Am. j. solids struct.. Publicado em: 26/04/2018
-
3. A Cultural Algorithm for Optimal Design of Truss Structures
Abstract A cultural algorithm was utilized in this study to solve optimal design of truss structures problem achieving minimum weight objective under stress and deflection constraints. The algorithm is inspired by principles of human social evolution. It simulates the social interaction between the peoples and their beliefs in a belief space. Cultural Algori
Lat. Am. j. solids struct.. Publicado em: 2015-09
-
4. Kinematic Analysis of the Deployable Truss Structures for Space Applications
Abstract: Deployable structure technology has been used in aerospace and civil engineering structures very popularly. This paper reported on a recent development of numerical approaches for the kinematic analysis of the deployable truss structures. The dynamic equations of the constrained system and the computational procedures were summarized. The driving f
J. Aerosp. Technol. Manag.. Publicado em: 2012-12
-
5. Análise teórico-experimental da conexão estampada de treliça espacial de aço sob carregamentos estático e cíclico
Three-dimensional structures made of steel bars, widely known as space trusses, are very frequently used at the construction of roofs. These structures consist of steel bars, generally, connected by bolts at nodes. There are several types of connection for these 3D trusses, many are patented but others are not. In Brazil, the connection usually employed in t
Publicado em: 2008
-
6. Aplicação da descrição cinemática co-rotacional na análise não-linear geométrica de estruturas discretizadas por elementos finitos de treliças, vigas e cascas / The application of the co-rotational kinematic description to the geometrically non-linear analysis of structures modeled by truss, beam and shell finite elements
The co-rotational formulation was used as the kinematic description to evaluate the geometrically non-linear behavior of different types of structures on a static analysis. Along the current research, it was aimed to demonstrate the basic concepts of the co-rotational approach that is based on the separation of the total motion into rigid body and deformatio
Publicado em: 2006
-
7. Numerical analysis, using FEM, of connections in metallic space trusses / Análise numérica, via MEF, de ligações em treliças metálicas espaciais
As treliças espaciais vêm sendo freqüentemente utilizadas, de forma bastante diversificada, mas seu principal uso é como cobertura de grande vãos. Recentemente, vários acidentes com este tipo de estrutura têm acontecido, principalmente devido a uma série de considerações adotadas para dimensionamento, as quais não condizem com a realidade. Neste c
Publicado em: 2004
-
8. Theoretical and experimental analysis of space trusses / Análise teórica e experimental de treliças espaciais
This paper presents a study of the behavior of tubular circular section space trusses with the main emphasis placed on the performance of the various truss typologies used in Brazil. Nine space trusses with plan dimensions of 7.5m x 15.0m and one with plan dimensions of 7.5mx7.5m and height of 1.5m were tested. The joint type was varied with the objective to
Publicado em: 2003
-
9. Contribuição ao estudo da instabilidade lateral de vigas pré-moldadas / On the lateral stability of precast concrete beams
The lateral stability of long and slender precast concrete beams requires great attention. In particular, it is important to ensure the stability of these members during transitory phases like tilting and transport, and also when the deformability of temporary supports is taken into account. The state of the art of the problem of lateral stability in precast
Publicado em: 2002
-
10. IDENTIFICACIÓN DE SISTEMAS DE EXTRUCTURAS MECÁNICAS Y APLICACIONES / IDENTIFICATION OF MECHANICAL SYSTEMS WITH APPLICATIONS / IDENTIFICAÇÃO DE SISTEMAS DE ESTRUTURAS MECÂNICAS E APLICAÇÕES
The aims of this work are three: First, to make a brief review of linear system and estimation theory used in mechanical structure problems. Second, to study an algorithm called ERA (Eigensystem Realization Algorithm) that provides a minimal realization using the input (forces, moments, impulses) and output signals (accelerations). Third, to develop some num
Publicado em: 2000
-
11. Uma formulação teórica consistente para análise não linear de estruturas treliçadas espaciais
Aiming the study of the non-linear behaviour of space trusses, a general theory for the analysis of such structures by the finite element method is presented. The formulation take into accounts the material and geometric nonlinearities. The theory is developed applying a rigorous Lagrangian formulation where the corotacional thecnique is used to obtain the s
Publicado em: 2000