基于生死单元法的双辊铸轧过程热-力耦合数值模拟  

Thermal-mechanical Coupled Modelling and Numerical Simulation for Twin-roller Casting Process with Technique of Deactivate and Reactivate Element

作　　者：黄华贵[1,2] 刘文文[1,2] 王巍[2] 杜凤山[1,2] 

机构地区：[1]国家冷轧板带装备及工艺工程技术研究中心,秦皇岛066004 [2]燕山大学,秦皇岛066004

出　　处：《中国机械工程》2015年第11期1503-1508,共6页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(51474189);河北省自然科学基金资助项目(E2013203377)

摘　　要：以二辊160mm×150mm立式铝带实验铸轧机为对象,基于MSC.Marc商用有限元软件及其二次开发接口,引入纯铝固-液两相材料本构模型和界面压力热阻数学模型,建立了双辊铸轧过程热-力耦合非线性有限元模型。采用生死单元法模拟铝液的连续浇入,解决了辊套和铸轧区铝带材间的连续耦合传热问题。通过数值模拟,给出了铸轧速度、浇铸温度、熔池高度等因素对KISS点位置和辊面温度时间历程的影响规律,并对典型工况温度模拟结果进行了实验验证。Aiming at the？160 mm×150 mm vertical type experimental twin-rollers continuous caster,a thermal-mechanical coupled FEM model of twin-roller casting process was established with MSC.Marc and its＇secondary development interface based on the solid-liquid two phases constitutive model of pure aluminum and the thermal resistance model considering the contact pressure.The tech-nique of deactivate and reactivate element method was used to simulate the continuous casting of alu-minums liquid,and the problem of coupled heat transmission between the cast roll shell and alumi-num strip in the cast rolling area was therefore resolved.From the simulation results,the influences of casting speed,casting temperature,the height of cast rolling area on the position of KISS point and the time history of temperature on the roll surface were presented.An twin-roller casting experiment was carried out,and the numerical simulation results are in good agreements with the experimental data.

关 键 词：双辊铸轧 温度场 有限元法 生死单元法 数值模拟 

分 类 号：TG233.6[金属学及工艺—铸造] TP391.9[自动化与计算机技术—计算机应用技术]