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.
推演了索单元的切线刚度矩阵，建立了斜拉桥施工控制计算的几何非线性模型。
The paper deduces tangent stiffness matrix and set up geometrical nonlinear model of construction control calculation of the cable-stayed bridge.
推导了铰接杆系结构切线刚度矩阵较为简便的计算生成过程，便于在编程中实现。
Numerical calculation process to obtain the tangent stiffness matrix of structure is deduced and geometric stability of different types of structures are analyzed.
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