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根据离散变量结构可靠性优化设计的特点与难点，提出了基于改进遗传算法的可靠性优化设计方法．通过１５６杆输电塔屈服失效状态下的可靠性优化设计与简易海洋平台屈服及疲劳失效状态下的可靠性优化设计实例，验证了方法的有效性，在计算速度及解的质量方面都取得了比较满意的结果．
According to the characteristics and difficulties of discrete variable structure reliability optimization design, a reliability optimization design method based on improved genetic algorithm is proposed. The reliability of the 156-pole transmission tower under the yield failure condition and the reliability of the simplified offshore platform under the condition of fatigue and fatigue are optimized to verify the effectiveness of the method. The calculation speed and the solution quality are compared. Satisfying result.