单元刚度矩阵（element stiffness matrix）是计算固体力学中利用有限元方法计算的重要一个重要的系数矩阵。在对有限单元体的力学分析中，表征单元体的受力与变形关系。
推导了模型的单元刚度矩阵和各杆件的刚度。
Stiffness matrix of the model and element stiffness is provided.
推导了模型的单元刚度矩阵和各杆件的刚度。
Stiffness matrix of the model and element stiffness was developed.
应用加权余量法推导出单元刚度矩阵和单元载荷矩阵。
The element stiffness and load matrices are derived by Galerkin's weighted residual method.
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