中文摘要：

以提高轧辊使用寿命和板形控制质量为目的，提出了热连轧机支承辊辊型曲线的优化设计。基于实际生产状况与轧制板形理论的研究建立了多目标优化设计数学模型，设计了辊型曲线并进行了优化计算分析。模拟计算和生产试验表明，优化设计的辊型可均匀辊间接触压力分布、降低轧辊不均匀磨损程度、避免辊身端部疲劳剥落，并提高了弯辊力对板形的控制效果。研究方法不仅为支承辊辊型的设计与改造提供了理论依据，且优化辊型本身也具有进一步的推广实用价值。

英文摘要：

In order to improve service life of roll and control of strip flatness in hot rolling production,a multi-objective optimization design for back-up roll contour was established based on production conditions and strip flatness control theory. Simulated calculation and production experiment showed that contact pressure distribution between rolls is evened; uneven wear of roll body is reduced; edge spalling of roll surface is prevented; and control effect of strip flatness is improved. The optimization roll contour is valuable and worth further spreading.