考虑畸变时薄壁箱梁受扭分析的精细积分法

Precise Integration Method for Torsion Analysis of Thin-walled Box Beam When Distortion Was Considered

在广义坐标法的假定下,导出考虑畸变时薄壁箱形截面梁受扭分析的拉格朗日方程和哈密顿对偶求解体系,用精细积分法求该体系的高精度数值解。计算结果表明该方法精度高、计算简单、适用性强,可方便用于薄壁杆件结构的计算。

On the basis of generalized coordinate method assumption, Lagrange equations and Hamil- tonian dual system for torsion analysis of the thin-walled box beam are deduced by considering distor- tion. Then the high accuracy numerical solutions can be obtained by using a precise integration meth- od. Through the calculation results, this method has higher precision and greater applicability. The calculating process is simple. It can be conveniently used for the calculation of thin-walled bar struc- tures.