本文在T．L．坐标下，利用能量原理，同时导出了空间杆元精确的割线刚度矩阵和切线刚度矩阵显式。
In this paper, the tangent stiffness matrices and the secant stiffness matrices of space trusses are derived with the energy principle in the Total Lagrangian coordinates.
采用拖带坐标系下的退化壳单元，以及动态显式有限元方法求解管材在弯管机上的弯曲成型问题。
A dynamic explicit finite element method is used to pipe bend forming processes on bender in this paper. The degenerated shell element and co-rotational coordinate system are employed.
并建立了相应的薄壁单元刚度方程，从而得出了局部坐标系下单元刚度矩阵的显式。
And the corresponding thin-walled element stiffness equation was formulated. The apparent formulation of element stiffness matrix under the local coordination was attained.
本文借助于运动坐标系用显式有限元算法求解烧蚀动边界的传热问题。
An explicit finite element method is presented in this paper to solve the heat transfer problem with ablation moving boundary in a moving coordinate system.
本文借助于运动坐标系用显式有限元算法求解烧蚀动边界的传热问题。
An explicit finite element method is presented in this paper to solve the heat transfer problem with ablation moving boundary in a moving coordinate system.
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