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本文采用优文设计的方法,对某厂一型钢轧机(斜楔联接的开式机架)的现状进行了分析比较,结果表明:在U形架重量不变的情况下,优化设计后,U形架立柱在机架上盖止口接触处的刚度,可提高9％左右;楔孔处的强度,可提高12％左右,可见优化后的效果。本文还对静不定力对U形架立柱挠曲,一个立柱在机架上盖止口处的变形及对楔孔处应力的影响作了分析。本文使用惩罚函数法(SUMT),和无约束最优化求解法,求得惩罚函数ψ(X,r)的最优化解,以此无约束最优化解近似代替原目标函数F(X)的约束最优化解X~*,F(X~*)。
In this paper, by using the method of essay design, the status quo of a steel rolling mill (wedge-jointed open frame) of a factory is analyzed and compared. The results show that after the U-shaped frame has the same weight, U The rigidity of the frame post at the contact point of the cover of the frame can be increased by about 9%; the strength at the wedge hole can be increased by about 12%, which shows the optimized effect. The article also analyzes the deflection of the U-shaped frame column, the deformation of a column in the cover and the influence of the stress on the wedge hole. In this paper, the optimal solution to the penalty function ψ (X, r) is obtained by using the penalty function method (SUMT) and the unconstrained optimization solution, so that the unconstrained optimization solution is replaced by the original objective function F (X) Optimal solution X ~ *, F (X ~ *).