本文提出在设计风速一次作用下,发生破坏概率最小,并结构物重量最轻的双目标优化思想.并构造了一个含有这二个目标值的替代函数.使上述矢量优化问题转化为一个替代的无约束优化问题来解决.其优点在于省时,方便.结构破坏概率不作为约束条件而作为目标提出,不必事先定出约束的边界,节省准备时间.其次,计算时无须每步判别是否满足约束条件,正大大地节省机时. This paper proposes a double-objective optimization idea with the least damage probability and the lightest weight of the structure under a single action of design wind speed. An alternative function containing these two target values ​​is constructed. The above vector optimization problem is transformed into an alternative. Unconstrained optimization problem to solve. The advantage is that it is time-saving and convenient. Structure destruction probability is not set as a constraint condition as a goal, without having to set the boundary of the constraint in advance, saving preparation time. Second, the calculation does not require each step to determine whether to meet the constraints Conditions are greatly saving machine time.