多工况下复杂杆系结构的截面优化研究

Section Optimization of Complex Trusses under Multiple Load Cases

根据复杂杆系结构的特点，将约束函数分为局部约束和全局约束，提出了一种用于约束函数处理的简化方法。该方法是利用约束违反程度系数将约束函数归一化，并形成统一约束函数，然后用相对差商法求解经过简化后的数学模型。通过对结构优化算例的计算，说明该方法可大幅度提高计算效率。

In the basis of the characteristic of complex trusses, the constraint functions are separated into local constraints and global constraints, and a simple method for working constraint functions is p resented in this paper. The constraint functions are normalized with v iolated constraint grade coefficients(VCGC) in this method, and the mo del is solved with relative difference quotient algorithm(RDQA). Numer ical results of examples indicate that the method is feasible.