大型结构优化选型计算的探讨

On the Calculation of Optimal Style Selection for Large-Size Constructions

本文探讨了大型结构优化选型计算问题.根据原有结构型式和设计经验建立优化选型计算模型;对目标函数和约束条件在数学上进行近似处理后,利用Kuhn-Tuckr条件和Lagrange乘子,把选型问题转化为求解典型二次规划问题;引进加权因子和利用改进后的变尺度法使计算过程简化、可靠,计算精度较高.

A Practical calculating method for optimal style selection for large-size construction is described. On the basis of the original construction style and design experience, a calculating model for optimal style selection is developed. After approximate treatment of the objective function and constraint conditions, the style selection problem is reduced to the solving of a canonical quadratic programming one based on the Kuhn-Tucker condition and La-grange multiplier. The calculation is simple and highly accurate owing to the introduction of the weighted factor and an improved variable metric method.