桁架
笛卡尔坐标系
非线性系统
运动学
刚体
职位(财务)
趋同(经济学)
数学
格子(音乐)
运动(物理)
几何学
数学分析
经典力学
结构工程
物理
工程类
经济
量子力学
经济增长
声学
财务
作者
Marcelo Greco,R. C. G. Menin,Ivone Passos Ferreira,Felício Bruzzi Barros
出处
期刊:Structural Engineering and Mechanics
[Techno-Press]
日期:2012-03-25
卷期号:41 (6): 735-750
被引量:18
标识
DOI:10.12989/sem.2012.41.6.735
摘要
This paper presents a comparison between two different procedures to deal with the geometric nonlinear analysis of space trusses, considering its structural stability aspects. The first nonlinear formulation, called positional, uses nodal positions rather than nodal displacements to describe the finite elements kinematics. The strains are computed directly from the proposed position concept, using a Cartesian coordinate system fixed in space. The second formulation, called corotational, is based on the explicit separation between rigid body motion and deformed motion. The numerical examples demonstrate the performances and the convergence of the responses for both analyzed formulations. Two numerical examples were compared, including a lattice beam with postcritical behavior. Despite the two completely different approaches to deal with the geometrical nonlinear problem, the results present good agreement.
科研通智能强力驱动
Strongly Powered by AbleSci AI