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1.问题的提出 对于Ⅰ字梁型钢截面优化设计中Lagrange乘子法,文献[1]说有解,文献[2]说无解。孰是孰非?本文就此进行探讨。 2.文献[2]的原意 由图1,有:目标函数A=2bt(2+k)→min(A);约束条件(抗弯强度与翼缘局部屈曲)
1. Proposal of the problem For the Lagrange multiplier method in the optimization design of I-shaped beam sections, there is a solution in [1] and no solution in [2]. This article discusses this issue. 2. The original intention of the literature [2] is shown in Fig. 1. They are: objective function A=2bt(2+k)→min(A); constraints (bending strength and local buckling of the flange)