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通过对拱坝多目标优化的模型、方法与程序实现的探讨，提出以经济性指标（如坝体方量Ｖ）和安全性指标（应力水平［σ］、强度失效概率Ｆ、高应力区范围Ｈ）作为优化的多个目标函数的设想。多目标优化采用理想点法，通过对各分目标的权系数调整，可提供反映设计者要求的多个解方案。同时首次探讨了拱坝优化的柔性建模方法，并通过程序予以实现。结合小湾拱坝，用上述方法提出了若干个推荐方案，初步效果良好。
Through the discussion of the multi-objective optimization model, method and program of arch dam, this paper puts forward a new method to optimize the multi-objective arch dam based on the economic indicators (such as the dam body mass V) and the safety index (stress level [σ] H) as the optimization of multiple objective function assumption. Multi-objective optimization uses the ideal point method, through the adjustment of the weight coefficients of each sub-target, can provide multiple solutions to reflect the designer’s requirements. At the same time, the flexible modeling method of arch dam optimization is discussed for the first time and realized through the procedure. In combination with Xiaowan arch dam, several recommended schemes are put forward by the above methods, and the initial results are good.