Buckling of Pretwisted Columns
Buckling of Pretwisted Columns
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发表时间：
1982-05
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通讯作者：
N. Tebedge
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作者：
N. Tebedge
介绍了预扭转对柱屈曲载荷的影响。针对预扭转柱的稳定性分析，建立了一种有限元公式。通过对预扭转柱及其他相关类型柱的数值算例，验证了该有限元模型。在所有情况下，都观察到良好的收敛性，使用少量单元即可获得令人满意的精度，且所需的计算工作量极小。通过改变预扭转角度，给出了屈曲载荷及相关屈曲模态的实验结果。预测值与实验结果吻合良好。以表格形式以及图形形式给出了不同预扭转角度和不同主惯性矩比下预扭转柱临界载荷的有限元解。
The effect of pretwist on the buckling load of column is presanted. A finite element formulation is developed for the stability analysis of pretwisted columns. Numerical examples are used on pretwisted columns and other related types of columns to demonstrate the finite element model. In all cases, good convergence is observed and satisfactory accuracy is obtained by using few elements, and the required computational effort is found to be minimal. Experimental results are presented for the buckling loads and the associated buckling modes by varying the angles of pretwist. Good agreement between the predicted values and the experimental results is observed. Finite element solutions, of critical loads of pretwisted columns are presented in tabular form and also graphically for various angles of pretwist and different ratios of principal moment of inertia.