Relationships between equilibrium matrix and tangent stiffness matrix, linear stiffness matrix, initial stress stiffness matrix are discussed. NFM separates stiffness into two parts, which are derived from topology and material.
与几何非线性有限元法进行了比较,深入阐述平衡矩阵与切线刚度矩阵、线性刚度矩阵、初始应力矩阵的联系,指出了该方法进行动不定结构分析的优越性。
参考来源 - 动不定结构的平衡矩阵分析方法与理论研究·2,447,543篇论文数据，部分数据来源于NoteExpress
列式法求解切线刚度矩阵来考虑几何非线性。
For geometrical nonlinearity, Updated Lagrangian formulations are adopted to derive the tangent stiffness matrix.
讨论了桥梁结构分析中常用单元切线刚度矩阵的具体表达形式。
The concrete expression of the unit tangent line stiffness matrix is given.
利用变分原理，推导了两节点二维曲梁单元几何非线性的单元切线刚度矩阵。
From the variation principle, an analytical solution of the tangential stiffness matrices with nonlinear effects geometrically, for two-nodal two-dimension curved beam element, has been derived.
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