中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2013, Vol. 32 ›› Issue (4): 564-568.DOI: 10.3969 /j.issn.1674-0696.2013.04.04

• • 上一篇    下一篇

空间大挠度 Timoshenko 梁的有限元计算方法

刘小会1,王家林1,严 波2   

  1. 1.重庆交通大学 土木建筑学院,重庆 400074;2.重庆大学 资源及环境科学学院,重庆 400044
  • 收稿日期:2012-12-18 修回日期:2013-04-18 出版日期:2013-08-15 发布日期:2014-10-27
  • 作者简介:刘小会(1981—),男,内蒙古包头人,讲师,博士,主要从事柔性结构行为分析的研究。E-mail:cqdxlxh@126.com。
  • 基金资助:
    国家自然科学基金重点项目( 51277186)

FEM Calculation of Space Timoshenko Beam of Large Deflection

Liu Xiaohui1,Wang Jialin1,Yan Bo2   

  1. 1.School of Civil Engineering & Architecture,Chongqing Jiaotong University,Chongqing 400074,China;2.School of Resources & Environmental Science,Chongqing University,Chongqing 400044,China
  • Received:2012-12-18 Revised:2013-04-18 Online:2013-08-15 Published:2014-10-27

摘要: 解析了几何非线性的大挠度 Timoshenko 梁的变分原理,建立了考虑横向剪切应变的大挠度梁的空间单元刚度矩阵; 采用基于梁截面弯矩-曲率关系的宏观有限元方法,直接通过节点坐标系计算内部节点力,提高了大位移、大转动梁的计算精度及效率; 编制了考虑单元大转角、大位移和剪切变形影响的非线性有限元程序; 通过数值算例验证了该程序的可行性和有效性。

关键词: 几何非线性, 大挠度, 空间梁, 剪切变形

Abstract: A variation principle for Timoshenko beams of large deflection with geometrical non-linearity is presented. And the space beam element stiffness matrix of large deflection can be deduced from this variation principle,considering the effect of the shear deformation. To improve the computational precision and efficiency for the large displacement and rotation of beam,a finite element method based on the moment-curvature relationship of beam section is presented. The method calculated by node coordinates of the beam element is applied to calculate the internal nodal forces. A nonlinear finite element code is then developed which considers the effects of large rotations,large displacements and shear deformations. Numerical examples are provided in order to verify the feasibility and effectivity of the presented method.

Key words: geometric non-linearity, large deflection, space beam, shear deformation

中图分类号: