基于有限元分析的中间坯温度预报策略  

Temperature prediction strategy of intermediate slabs based on finite element method

作　　者：彭文[1] 陈树宗[1] 马更生[1] 张殿华[1] 

机构地区：[1]东北大学轧制技术及连轧自动化国家重点实验室,辽宁沈阳110004

出　　处：《中南大学学报（自然科学版）》2017年第11期2874-2881,共8页Journal of Central South University:Science and Technology

基　　金：国家重点研发计划资助项目(2017YFB0304100);国家自然科学基金资助项目(51704067;51774084;51634002)~~

摘　　要：在辊道运输过程中,中间坯上、下表面的换热边界条件不同,使表面温降过程存在差异,影响到精轧入口温度的预报,对厚度设定模型的精度也会产生影响。为提高模型精度,采用有限元法对传热过程进行系统分析,基于分析获得轧件辊道停留时间、粗轧出口温度及轧件厚度对表面温度的影响规律,进一步通过拟合得到轧件到达精轧入口时表面温度,并对轧件平均温度预报模型进行优化。研究结果表明:优化模型的预测精度能够有效满足实际控制要求。During the transport process, the heat transfer boundary conditions between the upper and lower surfaces ofthe intermediate slab are different, so there exist certain differences in the surface temperature drop process, and theprediction of the finishing entrance temperature will be influenced, as well as the set-up model precision. In order toenhance the model precision, the heat transfer process was analyzed systematically by the finite element method, and onthe basis of the analysis, the impact of residence time, initial temperature and the strip thickness on the surfacetemperature were obtained. The mathematical description of the surface temperature were obtained by fitting, and theaverage temperature prediction model was optimized. The results show that the predicted precision of the optimizedmodel can meet the actual control requirements effectively.

关 键 词：热连轧 有限元分析 对流换热 温度预报 

分 类 号：TG333.5[金属学及工艺—金属压力加工]