一种MSC.NASTRAN中偏心梁有限元计算结果修正方法

A Correction Method for the FEM Results of the Deflective Girder in MSC.NASTRAN

讨论了MSC.NASTRAN中偏心梁有限元计算结果的弯矩偏差现象,并给出了一种简便、准确的修正方法,能够有效地消除计算结果中偏心梁元的弯矩偏差,并得到较为理想的梁元内力。此修正方法通过插值得到计算部位的梁元轴力,带入修正公式得到偏心梁的修正弯矩。将此法与通常的有限元网格细化方法进行了比较,证实了此方法的精确性。

The warp of moment of the deflective girder in the FEM results of MSC.NASTRAN is discussed,and presented a handy and exact correction method,to eliminate the warp of moment of the deflective girder in the FEM results effectively,and got the preferable element forces in the girder.In this method,interpolation is used to get the axial force at the analysis site,then put the force into the correction formula to get the corrected moment of the deflective girder.And this method is compared with the usual FEM mesh refining,the results prove the accuracy of the correction method.