[提要]  采用变量分解策略简化微曲面网架最小造价设计，并应用组合型离散优化算法求该类网架结构优化参数的最佳匹配方案。实际计算结果表明，在大跨度情况下微曲面网架比平板网架具有显著降低造价的优势。
[关键词]  网架 最小造价 离散优化设计 敏度分析 非线性规划

A variable decomposition strategy is suggested to reduce the cost minimization design of the less-curved surface grid, and a discrete combination optimization algorithm is developed to obtain the achiveing optimal matching scheme for all variable of the kind of grid structure. It is pointed out according to the calculation that, under the condition of large span,the less -curved surface grid has greater advfantage over the plan one in decreasing the cost.
Keywords: grid; minimization cost; discrete  optimization  design; sen.sitive  analysis; nonlinear  pro-gramming