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本文应用符拉索夫的开口薄壁杆件理论推导了一种新的开口薄壁杆件单元刚度矩阵。该单元刚度矩阵是建立在形心坐标系下的,它不仅消除了某些文章中由于混淆了形心坐标与扭心坐标所产生的错误,而且具有实用方便的特点。
This paper uses Vlasov’s open thin-walled bar theory to derive a new open-cell thin-walled element stiffness matrix. The unit stiffness matrix is established in the centroid coordinate system. It not only eliminates the errors caused by confusing the centroid coordinates and the twisted heart coordinates in some articles, but also has the characteristics of practical convenience.