Restrain alteration size is applied to improve the efficiency of structure optimization . approximate reanalysis technology is introduced to save the time of stress reanalysis . the multi - cantilever method and the finite element method is combined to analysis the arch dam , to enhance the capability of practical applications in engineer 在拱壩優(yōu)化設計中采用了約束變尺度算法,提高了優(yōu)化效率;在優(yōu)化重分析過程中,采用近似重分析技術,節(jié)省應力分析時間;采用試載法和有限元相結(jié)合的應力分析方法,提高了解決實際工程問題的能力。