| 吴国荣.柔性梁大变形计算的一种新方法[J].计算力学学报,2010,27(4): |
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| 柔性梁大变形计算的一种新方法 |
| A consistent element for calculating large deformation of flexible beams |
| 投稿时间：2008-12-06 |
| DOI：10.7511/jslx20104027 |
| 中文关键词: 大变形 梁 有限元 插值函数 非线性 |
| 英文关键词:large deformation beam FEM interpolation function nonlinear |
| 基金项目: |
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| 摘要点击次数: 1928 |
| 全文下载次数: 1617 |
| 中文摘要: |
| 研究了柔性梁大变形问题。常规Lagrangian有限元格式在处理大变形问题时,由于其单元插值函数不满足位移场的协调性要求,从而需要划分较多的单元,才能得到较好的结果。本文首先推导了Lagrangian坐标描述下的位移场变量满足的协调关系式,利用此关系式给出了位移场协调的非线性单元插值函数。基于虚功原理导出了梁大变形问题的非线性控制方程,数值计算结果证明了本文方法的正确性和有效性。 |
| 英文摘要: |
| Based on low Reynolds number,the aerodynamic characteristics of the Tandem-Airfoil were simulated numerically in using of 2D-CFD method. The lift and drag characteristics between the Tandem-Airfoil and the single airfoil had been compared. The impacts on the lift and drag characteristics made by the different angles of the canard and wing (δ) had been analyzed. And keeping αc=±5°, the impacts made by the relative distance and height of the installation had been investigated, finding that the canard in the upper position had the bigger (Cl)max and αcr, it could significantly improve the aerodynamic characteristics of Tandem-Airfoil. |
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