根据有限元理论，建立各单元刚度矩阵。
Based on the finite element method, the element stiffness matrix for each element is set up.
根据有限元理论及最优化理论，同时考虑结构受力特点，给出了塔架体系在可靠度约束下的最优化设计方法。
Based on finite element theory and optimization theory, considering mechanical properties of the structure, the reliability optimization design method of tower truss system is presented.
本文对这类结构进行了详细的理论分析，并根据有限元法编制了相应的电算分析程序。
In this paper, the detailed theoretical analyses are given, and the computer program is also presented based on the finite element method.
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