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本文提出拱坝体型优化的开裂约束条件，建立了小湾拱坝开裂约束下体型优化设计的数学模型，得出比较合理的优化体型，可供设计部门参考。
In this paper, the constraints of arch dam body shape optimization are proposed, and the mathematic model of body shape optimization design under the constraint of cracking of the Xiaowan arch dam is established. A more reasonable optimized body shape is obtained, which is available to the design department for reference.