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基于曲率离散的几何非线性空间梁单元

齐朝晖 方慧青 张志刚 王刚

齐朝晖, 方慧青, 张志刚, 王刚. 基于曲率离散的几何非线性空间梁单元[J]. 应用数学和力学, 2014, 35(5): 498-509. doi: 10.3879/j.issn.1000-0887.2014.05.004
引用本文: 齐朝晖, 方慧青, 张志刚, 王刚. 基于曲率离散的几何非线性空间梁单元[J]. 应用数学和力学, 2014, 35(5): 498-509. doi: 10.3879/j.issn.1000-0887.2014.05.004
QI Zhao-hui, FANG Hui-qing, ZHANG Zhi-gang, WANG Gang. Geometric Nonlinear Spatial Beam Elements With Curvature Interpolations[J]. Applied Mathematics and Mechanics, 2014, 35(5): 498-509. doi: 10.3879/j.issn.1000-0887.2014.05.004
Citation: QI Zhao-hui, FANG Hui-qing, ZHANG Zhi-gang, WANG Gang. Geometric Nonlinear Spatial Beam Elements With Curvature Interpolations[J]. Applied Mathematics and Mechanics, 2014, 35(5): 498-509. doi: 10.3879/j.issn.1000-0887.2014.05.004

基于曲率离散的几何非线性空间梁单元

doi: 10.3879/j.issn.1000-0887.2014.05.004
基金项目: 国家自然科学基金(11372057)
详细信息
    作者简介:

    齐朝晖(1964—),男,辽宁大连人,教授,博士生导师(通讯作者. E-mail: zhaohuiq@dlut.edu.cn)

  • 中图分类号: O342

Geometric Nonlinear Spatial Beam Elements With Curvature Interpolations

Funds: The National Natural Science Foundation of China(11372057)
  • 摘要: 以绝对坐标为节点参数的梁单元在结构的几何非线性分析和多柔体系统动力学中都有广泛的应用前景.其中一种具有代表性的单元为基于精确几何模型的梁单元,但它的构造过程涉及对节点转动矢量的插值,由此引起了很多数值求解方面的困难.由Shabana提出的绝对坐标梁单元,其节点参数中不含转动矢量,从而避免了对转角的插值,但却为此大幅度地增加了节点参数.以大变形梁虚功率方程为理论基础,先通过单元的形心曲线插值得到端面曲率及其对弧长的变化率,进而对单元域内的曲率进行插值,提出了一种既可避免转动矢量插值同时又不增加节点参数的空间梁单元,可用于梁的大变形几何非线性分析.数值算例验证了该单元的合理性.
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出版历程
  • 收稿日期:  2014-02-26
  • 修回日期:  2014-04-10
  • 刊出日期:  2014-05-15

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